RE: PWM boards

I agree with Tim. I have seen this identical = problem on one of our units and
was caused by charred contacts on one of the step = start relays (K2).

-----Original Message-----
From: twaldron@mail.mdanderson.org [mailto:twaldron@mail.mdande= rson.org]
Sent: Wednesday, February 05, 2003 6:28 AM
To: Bob Huff
Cc: linac-eng@plato.aristotle.net
Subject: Re: PFN

A good place to start is the K2, K3, K4 contactors = (step-start, mode A/B).
They're not easy to get to for that SN (might as = well just replace given the
effort needed to inspect), but what will happen is = that the contacts will get a
little burnt and cause all manner of PFN, DQing and = AFC symptoms, often with a
"heating up" aspect.
On the C1 and C2 types, those Cutler Hammer = contactors last 5-7 years easily,
but the C3 types (Telemechanique) are only lasting 3 = years here. We've seen
enough problems with the newer ones that we just = replace them every 3 years and
be done with it.
Best of luck.

"Bob Huff" = <radiotherapy@engineer.com> on 02/05/2003 06:41:15 AM
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;

          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
To:      = linac-eng@plato.aristotle.net       &= nbsp;           &= nbsp;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
cc:      (bcc: = Timothy J. = Waldron/MDACC)         &nbs= p;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
Subject: = PFN           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;
          &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;           &nb= sp;

Hello,
I have a 2100C, #656. Machine runs good all = day for clinical use. My problem is
during extended runs of about 2000 m/u, dose rate = begins to drop off, and will
eventually be zero. I've checked the usual = parameters: DQing, RFDR, FWD pwr,
AFC, and all seems to be good. The only significant = change I can see is the PFN
voltage on the Meters display. It is a nominal = 30.35, but after beamed on for
about 5-6 min, it will begin to drop. Once this = value gets below 30, that's when
the dose rate drops off. My educated guess is that = something in the modulator is
heating up, and then breaking down. I can beam off, = and immediately beam on
again, and dose rate will be normal for several more = minutes. Anyone have some
suggestions as to where to begin?

Thanks in advance,
&nb= sp; Bob
--
__________________________________________________________
Sign-up for your own FREE Personalized E-mail at = Mail.com
http://www.mail.com/?sr=3Dsignup

Best regards to all

David Burgess

Nova Scotia Cancer=20 Centre

This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version.

--=_1B4458EE.ABCADB69-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 14 03:57:31 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18tfNy-00021U-00; Fri, 14 Mar 2003 03:57:30 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2D07A1112F1; Fri, 14 Mar 2003 03:55:41 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id UAA18438 for linac-eng-list; Thu, 13 Mar 2003 20:27:10 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dmx.hs.uab.edu ([164.111.99.209]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id UAA18434 for ; Thu, 13 Mar 2003 20:27:08 -0600 (CST) Received: from msgia.hs.uab.edu ([10.20.2.43]) by dmx.hs.uab.edu (Netscape Messaging Server 3.6) with ESMTP id AAA5584 for ; Thu, 13 Mar 2003 20:23:18 -0600 Received: from INET-MTA by msgia.hs.uab.edu with Novell_GroupWise; Thu, 13 Mar 2003 20:25:46 -0600 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.3 Beta Date: Thu, 13 Mar 2003 20:25:30 -0600 From: "Stephen Jordan" To: Subject: 2100C C1 sn 069 symm meters Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id UAA18435 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 13 Mar 2003 20:25:30 -0600 From: "Stephen Jordan" To: Subject: 2100C C1 sn 069 symm meters Content-Disposition: inline X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id UAA18435 Sender: owner-linac-eng@plato.aristotle.net I have an interesting problem with my C1 2100C. During the cal/check cycle, with any energy selected, the Radial meter displays -1.0, while the Transverse meter shows -9.9. We have had an ongoing issue with electron symmetry drift, and the V regional specialist suggested I troubleshoot this circuit (I believe it's on the Dual Ion Ch Interlock pcb) before any further steps are taken. So far, I've been unsuccessful in getting a straight answer as to what this circuits function is; the training manuals do not cover this vintage of board.....I have my doubts as to the relevance of this circuit to my problem. Can someone shed some light? Thanks in advance! Steve Jordan UAB Rad Physics 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 14 12:31:41 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18tnPZ-0005Sh-00; Fri, 14 Mar 2003 12:31:41 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 437791112F1; Fri, 14 Mar 2003 12:29:55 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id EAA24203 for linac-eng-list; Fri, 14 Mar 2003 04:59:30 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-d05.mx.aol.com (imo-d05.mx.aol.com [205.188.157.37]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id EAA24199 for ; Fri, 14 Mar 2003 04:59:29 -0600 (CST) From: Rtsolution@aol.com Received: from Rtsolution@aol.com by imo-d05.mx.aol.com (mail_out_v34.21.) id s.d.c0b518d (4222); Fri, 14 Mar 2003 05:58:54 -0500 (EST) Message-ID: Date: Fri, 14 Mar 2003 05:58:54 EST Subject: Re: Varian PMIs To: JMADDOX@LROC.HARVARD.EDU, linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_d.c0b518d.2ba30fee_boundary" X-Mailer: 7.0 for Windows sub 10502 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Rtsolution@aol.com Date: Fri, 14 Mar 2003 05:58:54 EST Subject: Re: Varian PMIs To: JMADDOX@LROC.HARVARD.EDU, linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_d.c0b518d.2ba30fee_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I have 4 linac, two new and 2 old, and one Xim. I have one engineer and we look after service and physic QC. Every 2 weeks the machines (linacs) are serviced in am and QC in pm. The new machines are come with contract PMI 4 times annually and will be reviewed when contract ends. How about your centers ? RTsolution --part1_d.c0b518d.2ba30fee_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable I have 4 linac, two new and 2 old, and one Xim.

I have one engineer and we look after service and physic QC. Every 2 weeks t= he machines (linacs) are serviced in am and QC in pm. The new machines are c= ome with contract PMI 4 times annually and will be reviewed when contract en= ds.

How about your centers ?

RTsolution --part1_d.c0b518d.2ba30fee_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 14 12:45:31 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18tncx-0005ZD-00; Fri, 14 Mar 2003 12:45:31 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id DF9BF1112F1; Fri, 14 Mar 2003 12:43:45 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id FAA24443 for linac-eng-list; Fri, 14 Mar 2003 05:24:39 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail5.nhs.uk (mail5.nhs.uk [194.72.23.242]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id FAA24439 for ; Fri, 14 Mar 2003 05:24:37 -0600 (CST) From: David.Smith@arh.grampian.scot.nhs.uk Received: from hn-ext by mail5.nhs.uk (Sendmail 8.8.8) with esmtp id 18tnID-00056v-00; Fri, 14 Mar 2003 11:24:05 +0000 Received: from relay.nhs.uk (194.62.42.142) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E607712002667E9 for linac-eng@plato.aristotle.net; Fri, 14 Mar 2003 11:24:05 +0000 Received: from mta.grampian.scot.nhs.uk (195.106.102.11) by relay.nhs.uk (Syntegra-2 7.0.008) id 3E6F2586000AC834; Fri, 14 Mar 2003 11:24:12 +0000 Received: from arh_mail.grampian.scot.nhs.uk (actually host arh.grampian.scot.nhs.uk) by mta.grampian.scot.nhs.uk with SMTP (Mailer) with ESMTP; Fri, 14 Mar 2003 11:21:01 +0000 Received: by arh.grampian.scot.nhs.uk with Internet Mail Service (5.5.2650.21) id ; Fri, 14 Mar 2003 11:24:32 -0000 Message-ID: <5FB97D7B340FD2118A6100A0C9A9A1F505D07D50@arh.grampian.scot.nhs.uk> To: srjordan@uabmc.edu, linac-eng@plato.aristotle.net Subject: RE: 2100C C1 sn 069 symm meters Date: Fri, 14 Mar 2003 11:24:31 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: David.Smith@arh.grampian.scot.nhs.uk To: srjordan@uabmc.edu, linac-eng@plato.aristotle.net Subject: RE: 2100C C1 sn 069 symm meters Date: Fri, 14 Mar 2003 11:24:31 -0000 Sender: owner-linac-eng@plato.aristotle.net Steve, We had a similar problem, but it was during beam on when Radial symmetry was displaying an error of up to 1.5 (which does directly relate to % symmetry). The problem was a dodgy solid state relay K1 on beam position servo pcb. Dave Smith (Aberdeen) > -----Original Message----- > From: Stephen Jordan [SMTP:srjordan@uabmc.edu] > Sent: Friday, March 14, 2003 2:26 AM > To: linac-eng > Subject: 2100C C1 sn 069 symm meters > > I have an interesting problem with my C1 2100C. During the cal/check > cycle, with any energy selected, the Radial meter displays -1.0, while the > Transverse meter shows -9.9. We have had an ongoing issue with electron > symmetry drift, and the V regional specialist suggested I troubleshoot > this circuit (I believe it's on the Dual Ion Ch Interlock pcb) before any > further steps are taken. So far, I've been unsuccessful in getting a > straight answer as to what this circuits function is; the training manuals > do not cover this vintage of board.....I have my doubts as to the > relevance of this circuit to my problem. Can someone shed some light? > Thanks in advance! > > Steve Jordan > UAB Rad Physics 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 14 15:06:38 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18tppW-0007As-00; Fri, 14 Mar 2003 15:06:38 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 42B6F1112F3; Fri, 14 Mar 2003 15:04:53 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA26199 for linac-eng-list; Fri, 14 Mar 2003 07:36:09 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from hccexch.harringtoncc.org ([207.19.3.226]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA26178 for ; Fri, 14 Mar 2003 07:36:06 -0600 (CST) Subject: RE: Varian PMIs Date: Fri, 14 Mar 2003 07:32:17 -0600 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Message-ID: <2617828127B3A34CB94408B1507E9EEA7537AC@hccexch.harringtoncc.org> X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 content-class: urn:content-classes:message Thread-Topic: Varian PMIs Thread-Index: AcLqI4SBQsfXwdXhQfOMxLjfGvH0qQAB2txA From: "Steve Robinson" To: Cc: Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA26179 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Subject: RE: Varian PMIs Date: Fri, 14 Mar 2003 07:32:17 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 content-class: urn:content-classes:message Thread-Topic: Varian PMIs Thread-Index: AcLqI4SBQsfXwdXhQfOMxLjfGvH0qQAB2txA From: "Steve Robinson" To: Cc: X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA26179 Sender: owner-linac-eng@plato.aristotle.net There are probably as many situations as engineers. As for myself, I am the sole engineer and I have 3 LINACS (6/100, 2100CD, & 23EX) plus a XIM. I am quite new to this game so I don't really have any reference as to how other centers operate. We have a patient load of 80 to 100. During the high patient load periods, PMI's are quite challenging to find time to perform. I find myself coming in early (i.e. 4:30 AM) to get a jump on it and keep the process flowing. So as you can see, PMI's is a process that truly never ends. I stop once the therapists arrive and place myself on call for the rest of the day. If everything goes OK, and once treatment time is over, I rest and the process starts all over again. Some days treatment time can last until 8 PM. I also need too work on some Saturdays (ONLY IF I HAVE TOO AND AT OVERTIME RATE). I am constantly looking for the best times and situations so although this is the current plan, if the need presents itself, I change! . There is also talk of adding a new machine in the near future. Just more stuff to do. > -----Original Message----- > From: Rtsolution@aol.com [SMTP:Rtsolution@aol.com] > Sent: Friday, March 14, 2003 4:59 AM > To: JMADDOX@LROC.HARVARD.EDU; linac-eng@plato.aristotle.net > Subject: Re: Varian PMIs > > I have 4 linac, two new and 2 old, and one Xim. > > I have one engineer and we look after service and physic QC. Every 2 weeks the machines (linacs) are serviced in am and QC in pm. The new machines are come with contract PMI 4 times annually and will be reviewed when contract ends. > > How about your centers ? > > RTsolution 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 14 16:32:20 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18trAS-0008Cc-00; Fri, 14 Mar 2003 16:32:20 +0100 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 60DB61112F1 for ; Fri, 14 Mar 2003 16:30:37 +0100 (MET) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KTIRH1WYJ48XW1UN@med.uu.nl> for kok@radth.med.uu.nl; Fri, 14 Mar 2003 16:19:40 +0100 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KTIRGYTLSS8XU4XQ@med.uu.nl> for kok@radth.med.uu.nl; Fri, 14 Mar 2003 16:19:36 +0100 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA26199 for linac-eng-list; Fri, 14 Mar 2003 07:36:09 -0600 (CST) Received: from hccexch.harringtoncc.org ([207.19.3.226]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA26178 for ; Fri, 14 Mar 2003 07:36:06 -0600 (CST) Date: Fri, 14 Mar 2003 07:32:17 -0600 From: Steve Robinson Subject: RE: Varian PMIs Sender: owner-linac-eng@plato.aristotle.net To: Rtsolution@aol.com Cc: linac-eng@plato.aristotle.net Message-id: <2617828127B3A34CB94408B1507E9EEA7537AC@hccexch.harringtoncc.org> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft Exchange V6.0.5762.3 X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA26179 Content-type: text/plain; charset="us-ascii" Content-transfer-encoding: 8bit Precedence: bulk Thread-Topic: Varian PMIs Thread-Index: AcLqI4SBQsfXwdXhQfOMxLjfGvH0qQAB2txA content-class: urn:content-classes:message X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Fri, 14 Mar 2003 07:32:17 -0600 From: Steve Robinson Subject: RE: Varian PMIs Sender: owner-linac-eng@plato.aristotle.net To: Rtsolution@aol.com Cc: linac-eng@plato.aristotle.net X-MIMEOLE: Produced By Microsoft Exchange V6.0.5762.3 X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA26179 Thread-Topic: Varian PMIs Thread-Index: AcLqI4SBQsfXwdXhQfOMxLjfGvH0qQAB2txA content-class: urn:content-classes:message X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f There are probably as many situations as engineers. As for myself, I am the sole engineer and I have 3 LINACS (6/100, 2100CD, & 23EX) plus a XIM. I am quite new to this game so I don't really have any reference as to how other centers operate. We have a patient load of 80 to 100. During the high patient load periods, PMI's are quite challenging to find time to perform. I find myself coming in early (i.e. 4:30 AM) to get a jump on it and keep the process flowing. So as you can see, PMI's is a process that truly never ends. I stop once the therapists arrive and place myself on call for the rest of the day. If everything goes OK, and once treatment time is over, I rest and the process starts all over again. Some days treatment time can last until 8 PM. I also need too work on some Saturdays (ONLY IF I HAVE TOO AND AT OVERTIME RATE). I am constantly looking for the best times and situations so although this is the current plan, if the need presents itself, I change! . There is also talk of adding a new machine in the near future. Just more stuff to do. > -----Original Message----- > From: Rtsolution@aol.com [SMTP:Rtsolution@aol.com] > Sent: Friday, March 14, 2003 4:59 AM > To: JMADDOX@LROC.HARVARD.EDU; linac-eng@plato.aristotle.net > Subject: Re: Varian PMIs > > I have 4 linac, two new and 2 old, and one Xim. > > I have one engineer and we look after service and physic QC. Every 2 weeks the machines (linacs) are serviced in am and QC in pm. The new machines are come with contract PMI 4 times annually and will be reviewed when contract ends. > > How about your centers ? > > RTsolution 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 14 19:30:32 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18ttwu-0000Ph-00; Fri, 14 Mar 2003 19:30:32 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 554351112F1; Fri, 14 Mar 2003 19:28:48 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id LAA02582 for linac-eng-list; Fri, 14 Mar 2003 11:47:25 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICI.MGH.HARVARD.EDU (phsexchici.mgh.harvard.edu [132.183.126.51]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id LAA02576 for ; Fri, 14 Mar 2003 11:47:23 -0600 (CST) Received: by phsexchici.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id ; Fri, 14 Mar 2003 12:31:16 -0500 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F131@phsexch6.partners.org> From: "Maddox, Buford J" To: "'Bob Huff'" , linac-eng@plato.aristotle.net Subject: RE: KSOL Date: Fri, 14 Mar 2003 12:31:13 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="ISO-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'Bob Huff'" , linac-eng@plato.aristotle.net Subject: RE: KSOL Date: Fri, 14 Mar 2003 12:31:13 -0500 Sender: owner-linac-eng@plato.aristotle.net If the PS is ok, load may be changing. do you have records of the V right at the solenoid, with 35 amps? Water inside could lower the resistance some, bypass some of the current so the kly focus is off a little. Water temp will also change the resistance, and the PS V will follow since it regulates in current mode. It may take while to settle. You have to be at 40C and well wqrmed up when you adjust those interlocks. I had a leaky valve, cold machine with off, screwed up AFC and adjustments of sol and BMI V interlocks. I would record the input V to the PCB to see if it is changing, try to rule out the opamp and its power supplies. Good luck, let us know what you find. Jerry -----Original Message----- From: Bob Huff [mailto:radiotherapy@engineer.com] Sent: Thursday, March 13, 2003 1:49 PM To: linac-eng@plato.aristotle.net Subject: KSOL Hello, Twice this month I've had to adjust the KSOL interlock null in the Aux Elect Chassis. I haven't had a KSOL fault, but when I've tried to beam on, the beam instantly shuts off and goes back to "ready" state. The value for the KSOL null on the "catch all" pcb in the aux chassis was -217mv. Once I null this out, the machine runs fine. I've notice that the KSOL power supply is only 94.4v, 35.3A. This voltage seems low, and the only record of the meters was at 103.8v, taken some time ago. My question.... has anyone seen this power supply drift? Is it adjustable/repairable? Any input is greatly appreciated. Bob Huff -- __________________________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 17 14:53:04 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18uv32-00030e-00; Mon, 17 Mar 2003 14:53:04 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 37F721112F3; Mon, 17 Mar 2003 14:51:35 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA06715 for linac-eng-list; Mon, 17 Mar 2003 07:16:16 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsmq08.netvigator.com (imsmq08.netvigator.com [218.102.49.40]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA06711 for ; Mon, 17 Mar 2003 07:16:14 -0600 (CST) Received: (qmail 11238 invoked from network); 17 Mar 2003 13:15:58 -0000 Received: from pcd566193.netvigator.com (HELO kyeung) (218.102.98.193) by imsmq08.netvigator.com with SMTP; 17 Mar 2003 13:15:58 -0000 Message-ID: <004f01c2ec87$532578e0$269afea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re; Varian gantry mechanical readout installation Date: Mon, 17 Mar 2003 21:15:47 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004C_01C2ECCA.61272720" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re; Varian gantry mechanical readout installation Date: Mon, 17 Mar 2003 21:15:47 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_004C_01C2ECCA.61272720 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, =20 Varian C-series Clinac We have a problem of discrepancy between the gantry's mechanical and = digital readout. The discrepancy is about 1 degree and is not the = off-set type.=20 It seems the centers of the pendulum and the mechanical readout casing = are not concentric, we do not know how to local the center of the = pendulum.=20 Could anyone advise the installation procedure of Varain C-series = gantry mechanical readout? Thanks in advance. Kim Yeung ------=_NextPart_000_004C_01C2ECCA.61272720 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

= Varian=20 C-series Clinac

We have a problem of = discrepancy between=20 the gantry's mechanical and digital readout. The discrepancy is about 1 = degree=20 and is not the off-set type.

It seems the centers of the pendulum = and the=20 mechanical readout casing are not concentric, we do not know = how to=20 local the center of the pendulum.

Could anyone advise = the installation procedure=20 of Varain C-series gantry mechanical readout?

Thanks in advance.

Kim Yeung

------=_NextPart_000_004C_01C2ECCA.61272720-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 17 16:09:39 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18uwF9-0003zW-00; Mon, 17 Mar 2003 16:09:39 +0100 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id A58F01112F3 for ; Mon, 17 Mar 2003 16:08:12 +0100 (MET) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KTMXG9IRZK8XOYSV@med.uu.nl> for kok@radth.med.uu.nl; Mon, 17 Mar 2003 15:54:25 +0100 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KTMXE0NTI08XNKP7@med.uu.nl> for kok@radth.med.uu.nl; Mon, 17 Mar 2003 15:52:11 +0100 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA06715 for linac-eng-list; Mon, 17 Mar 2003 07:16:16 -0600 (CST) Received: from imsmq08.netvigator.com (imsmq08.netvigator.com [218.102.49.40]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA06711 for ; Mon, 17 Mar 2003 07:16:14 -0600 (CST) Received: (qmail 11238 invoked from network); Mon, 17 Mar 2003 13:15:58 +0000 Received: from pcd566193.netvigator.com (HELO kyeung) (218.102.98.193) by imsmq08.netvigator.com with SMTP; Mon, 17 Mar 2003 13:15:58 +0000 Date: Mon, 17 Mar 2003 21:15:47 +0800 From: kim yeung Subject: Re; Varian gantry mechanical readout installation Sender: owner-linac-eng@plato.aristotle.net To: linac-eng Message-id: <004f01c2ec87$532578e0$269afea9@kyeung> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Mailer: Microsoft Outlook Express 6.00.2600.0000 Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_VX5ByA0lpQmBWpeqsoa9MA)" X-Priority: 3 X-MSMail-priority: Normal Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Mon, 17 Mar 2003 21:15:47 +0800 From: kim yeung Subject: Re; Varian gantry mechanical readout installation Sender: owner-linac-eng@plato.aristotle.net To: linac-eng X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Priority: 3 X-MSMail-priority: Normal X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This is a multi-part message in MIME format. --Boundary_(ID_VX5ByA0lpQmBWpeqsoa9MA) Content-type: text/plain; charset="iso-8859-1" Content-transfer-encoding: quoted-printable Hi Colleagues, =20 Varian C-series Clinac We have a problem of discrepancy between the gantry's mechanical and = digital readout. The discrepancy is about 1 degree and is not the = off-set type.=20 It seems the centers of the pendulum and the mechanical readout casing = are not concentric, we do not know how to local the center of the = pendulum.=20 Could anyone advise the installation procedure of Varain C-series = gantry mechanical readout? Thanks in advance. Kim Yeung --Boundary_(ID_VX5ByA0lpQmBWpeqsoa9MA) Content-type: text/html; charset="iso-8859-1" Content-transfer-encoding: quoted-printable

Hi Colleagues,

= Varian=20 C-series Clinac

We have a problem of = discrepancy between=20 the gantry's mechanical and digital readout. The discrepancy is about 1 = degree=20 and is not the off-set type.

It seems the centers of the pendulum = and the=20 mechanical readout casing are not concentric, we do not know = how to=20 local the center of the pendulum.

Could anyone advise = the installation procedure=20 of Varain C-series gantry mechanical readout?

Thanks in advance.

Kim Yeung

--Boundary_(ID_VX5ByA0lpQmBWpeqsoa9MA)-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 17 16:15:55 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18uwLD-000457-00; Mon, 17 Mar 2003 16:15:55 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 4D38E1112F3; Mon, 17 Mar 2003 16:14:27 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id IAA08138 for linac-eng-list; Mon, 17 Mar 2003 08:43:36 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from intfw1.phci.org ([207.67.109.80]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id IAA08134 for ; Mon, 17 Mar 2003 08:43:34 -0600 (CST) Received: through eSafe SMTP Relay 1047414200; Mon Mar 17 08:43:03 2003 Received: from intfw1.phci.org (root@localhost) by intfw1.phci.org with ESMTP id h2HEgu4V015427; Mon, 17 Mar 2003 08:42:56 -0600 (CST) Received: from wmhmail1.phci.org (smtpscan.phci.org [172.20.3.10]) by intfw1.phci.org with SMTP id h2HEgtrU015424; Mon, 17 Mar 2003 08:42:55 -0600 (CST) Received: through eSafe SMTP Relay 1047399707; Mon Mar 17 08:42:55 2003 Received: by wmhmail1.whs.org with Internet Mail Service (5.5.2653.19) id ; Mon, 17 Mar 2003 08:42:55 -0600 Message-ID: <7A3389A8D723D511B2260008C7B2BF390D6097@wmhmail.phci.org> From: "Williams, Rod" To: "'kim yeung'" , linac-eng Subject: RE: Re; Varian gantry mechanical readout installation Date: Mon, 17 Mar 2003 08:42:54 -0600 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2EC93.7E27F250" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Williams, Rod" To: "'kim yeung'" , linac-eng Subject: RE: Re; Varian gantry mechanical readout installation Date: Mon, 17 Mar 2003 08:42:54 -0600 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2EC93.7E27F250 Content-Type: text/plain; charset="iso-8859-1" 1 DEGREE How come yours is so close.??? Your machine must be a ringer. -----Original Message----- From: kim yeung [mailto:kimyeung@netvigator.com] Sent: Monday, March 17, 2003 7:16 AM To: linac-eng Subject: Re; Varian gantry mechanical readout installation Hi Colleagues, Varian C-series Clinac We have a problem of discrepancy between the gantry's mechanical and digital readout. The discrepancy is about 1 degree and is not the off-set type. It seems the centers of the pendulum and the mechanical readout casing are not concentric, we do not know how to local the center of the pendulum. Could anyone advise the installation procedure of Varain C-series gantry mechanical readout? Thanks in advance. Kim Yeung This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. ------_=_NextPart_001_01C2EC93.7E27F250 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

1=20 DEGREE How come yours is so close.??? Your machine must be a=20 ringer.

-----Original Message-----
From: kim yeung=20 [mailto:kimyeung@netvigator.com]
Sent: Monday, March 17, 2003= 7:16=20 AM
To: linac-eng
Subject: Re; Varian gantry mechani= cal=20 readout installation

Hi Colleagues,

= Varian=20 C-series Clinac

We have a problem of=20 discrepancy between the gantry's mechanical and digital read= out.=20 The discrepancy is about 1 degree and is not the off-set type.=20

It seems the centers of the pendulum a= nd the=20 mechanical readout casing are not concentric, we do not know how&= nbsp;=20 to local the center of the pendulum.

Could anyone advise the installat= ion=20 procedure of Varain C-series gantry mechanical=20 readout?

Thanks in advance.

Kim Yeung

This information is confidential and int= ended solely for the use of the individual or entity to whom it is addres= sed.

If you have received this email in error= please notify the sender or our Help Desk at (262) 928-2777.

We have scanned this email and its attac= hments for malicious content.

However, the recipient should check this= email and any attachments for the presence of viruses.

ProHealth Care, Inc. accepts no liabilit= y for any damage caused by any virus transmitted by this email.
------_=_NextPart_001_01C2EC93.7E27F250-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Mar 18 09:58:35 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18vCvb-0007Lt-00; Tue, 18 Mar 2003 09:58:35 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 51C031112F3; Tue, 18 Mar 2003 09:57:02 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id CAA24549 for linac-eng-list; Tue, 18 Mar 2003 02:33:39 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from ubht.swest.nhs.uk (hide227.nhs.uk [195.107.47.227]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id CAA24545 for ; Tue, 18 Mar 2003 02:33:36 -0600 (CST) Received: by ubhtfw1.ubht.swest.nhs.uk id <117124>; Tue, 18 Mar 2003 08:28:02 +0000 Message-Id: <03Mar18.082802gmt.117124@ubhtfw1.ubht.swest.nhs.uk> From: "White, Malcolm" To: linac-eng@plato.aristotle.net Date: Tue, 18 Mar 2003 08:32:41 -0000 Subject: Re Varian Mechanical readout installation MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Mailer: Internet Mail Service (5.5.2653.19) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "White, Malcolm" To: linac-eng@plato.aristotle.net Date: Tue, 18 Mar 2003 08:32:41 -0000 Subject: Re Varian Mechanical readout installation Sender: owner-linac-eng@plato.aristotle.net As I recall the mechanical readout is mounted on slots and you play with the positioning until you minimise the discrepancy between electrical and mechanical scales. Malcolm White 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Mar 18 19:14:59 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18vLc3-0006qm-00; Tue, 18 Mar 2003 19:14:59 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B0C491112F4; Tue, 18 Mar 2003 19:13:25 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id LAA03037 for linac-eng-list; Tue, 18 Mar 2003 11:27:12 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from spf1.us.outblaze.com (205-158-62-158.outblaze.com [205.158.62.158]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id LAA03033 for ; Tue, 18 Mar 2003 11:27:10 -0600 (CST) Received: (qmail 13093 invoked from network); 18 Mar 2003 17:25:56 -0000 Received: from unknown (205.158.62.68) by spf1.us.outblaze.com with QMQP; 18 Mar 2003 17:25:56 -0000 Received: (qmail 22364 invoked from network); 18 Mar 2003 17:26:13 -0000 Received: from unknown (HELO ws1-10.us4.outblaze.com) (205.158.62.111) by 205-158-62-153.outblaze.com with SMTP; 18 Mar 2003 17:26:13 -0000 Received: (qmail 39864 invoked by uid 1001); 18 Mar 2003 17:26:12 -0000 Message-ID: <20030318172612.39863.qmail@mail.com> Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-Mailer: MIME-tools 5.41 (Entity 5.404) Received: from [150.198.138.127] by ws1-10.us4.outblaze.com with http for radiotherapy@engineer.com; Tue, 18 Mar 2003 12:26:12 -0500 From: "Bob Huff" To: linac-eng@plato.aristotle.net Date: Tue, 18 Mar 2003 12:26:12 -0500 Subject: RE: KSOL X-Originating-Ip: 150.198.138.127 X-Originating-Server: ws1-10.us4.outblaze.com Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Content-Disposition: inline From: "Bob Huff" To: linac-eng@plato.aristotle.net Date: Tue, 18 Mar 2003 12:26:12 -0500 Subject: RE: KSOL X-Originating-Ip: 150.198.138.127 X-Originating-Server: ws1-10.us4.outblaze.com Sender: owner-linac-eng@plato.aristotle.net Thanks for all the input. What I found is the Klystron Solenoid is leaking water internally and now externally. The internal water leak was changing the resistance value of the winding, and affecting the voltage from the KSOL pwr supply (ohm's law). Now that I found the water leaking external to the solenoid, it is scheduled for replacement on Wednesday. Bob Huff ----- Original Message ----- From: "Kevin Pueschel" Date: Fri, 14 Mar 2003 09:49:54 -0500 To: "''Bob Huff''" Subject: RE: KSOL > Sounds like you have shorted turns in the KSOL. The purpose of the fault is > to detect just that problem. The power supply is fine, You are programming > current and it is maintaining that current setting, The load resistance has > changed to a lower value. If the resistance change can't be proved to be > caused by other factors such as temperature, Say Water temp at 20 C, then > the coil is shorted. > > Kevin Pueschel > > -----Original Message----- > From: owner-linac-eng@plato.aristotle.net > [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Bob Huff > Sent: Thursday, March 13, 2003 1:49 PM > To: linac-eng@plato.aristotle.net > Subject: KSOL > > Hello, > Twice this month I've had to adjust the KSOL interlock null in the Aux > Elect Chassis. I haven't had a KSOL fault, but when I've tried to beam on, > the beam instantly shuts off and goes back to "ready" state. > > The value for the KSOL null on the "catch all" pcb in the aux chassis > was -217mv. Once I null this out, the machine runs fine. I've notice that > the KSOL power supply is only 94.4v, 35.3A. This voltage seems low, and the > only record of the meters was at 103.8v, taken some time ago. > > My question.... has anyone seen this power supply drift? Is it > adjustable/repairable? > > Any input is greatly appreciated. > > Bob Huff > -- > __________________________________________________________ > Sign-up for your own FREE Personalized E-mail at Mail.com > http://www.mail.com/?sr=signup > > --- > Incoming mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.404 / Virus Database: 228 - Release Date: 10/15/2002 > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.404 / Virus Database: 228 - Release Date: 10/15/2002 > > -- __________________________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 19 15:03:11 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18ve9v-0004zp-00; Wed, 19 Mar 2003 15:03:11 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 377C41112F3; Wed, 19 Mar 2003 15:01:29 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA21693 for linac-eng-list; Wed, 19 Mar 2003 07:31:43 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail3.nhs.uk (mail3.nhs.uk [194.72.23.240]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA21689 for ; Wed, 19 Mar 2003 07:31:40 -0600 (CST) Received: from hn-ext by mail3.nhs.uk (Sendmail 8.8.8) with esmtp id 18vdfN-0005EW-00; Wed, 19 Mar 2003 13:31:37 +0000 Received: from relay.nhs.uk (194.62.42.143) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E6077120032C137 for linac-eng@plato.aristotle.net; Wed, 19 Mar 2003 13:31:37 +0000 Received: from carrot.ruh-bath.nhs.uk (194.189.240.90) by relay.nhs.uk (Syntegra-3 7.0.008) (authenticated as smtp-in_ruh-bath_swest_nhs_uk@es2002.nhs.uk) id 3E7751CA0003FF2D for linac-eng@plato.aristotle.net; Wed, 19 Mar 2003 13:31:37 +0000 Received: by carrot.ruh-bath.swest.nhs.uk with Internet Mail Service (5.5.2653.19) id <18RT9BWA>; Wed, 19 Mar 2003 13:31:36 -0000 Message-ID: <1F3B1695594CBE4EA34A153F14F31FDD1ADAC1@carrot.ruh-bath.swest.nhs.uk> From: "Amesbury, Ross" To: linac-eng@plato.aristotle.net Subject: service contracts Date: Wed, 19 Mar 2003 13:31:35 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Amesbury, Ross" To: linac-eng@plato.aristotle.net Subject: service contracts Date: Wed, 19 Mar 2003 13:31:35 -0000 Sender: owner-linac-eng@plato.aristotle.net Hi I am trying to find out what is the current general trend for servicing and repair of linacs, e.g. do you have a full service contract with the supplier of your equipment or an in house engineering department. Or any variation on this theme. Of particular interest are departments in the U.K. Ross Amesbury Royal United Hospital Bath 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 19 15:28:26 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18veYM-0005KS-00; Wed, 19 Mar 2003 15:28:26 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 63C9F1112F3; Wed, 19 Mar 2003 15:26:49 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA22109 for linac-eng-list; Wed, 19 Mar 2003 07:56:17 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from hccexch.harringtoncc.org ([207.19.3.226]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA22105 for ; Wed, 19 Mar 2003 07:56:10 -0600 (CST) content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Subject: RF Driver Replacements X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Wed, 19 Mar 2003 07:53:34 -0600 Message-ID: <2617828127B3A34CB94408B1507E9EEA7537AD@hccexch.harringtoncc.org> Thread-Topic: RF Driver Replacements Thread-Index: AcLuH0iaRTToOVhCEdeYSwABAyeA7w== From: "Steve Robinson" To: Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA22106 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f content-class: urn:content-classes:message Subject: RF Driver Replacements X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Wed, 19 Mar 2003 07:53:34 -0600 Thread-Topic: RF Driver Replacements Thread-Index: AcLuH0iaRTToOVhCEdeYSwABAyeA7w== From: "Steve Robinson" To: X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA22106 Sender: owner-linac-eng@plato.aristotle.net Hello to my fellow collages, I have an RF Driver problem which will require replacement. On an intermittent basic, output drops to 6-7 MU per minute. The event log shows the RF DRV MTR was somewhere between 17-19 when it should read approx. 41. I have had the opportunity to observe this phenomenon once and the RF DRV MTR reading made a slow climb from 12 up to approx. 20 the it jumped to a normal reading. I am not sure of any other practices except replacement for this problem. I would thank any input to the repair of this unit but I feel that replacement may be my only recourse. I had seen on occasion of other sources for replacement other than Varian and I would like to contact these people. If someone could forward phone numbers I need to start contacting them before I face total system failure. All other comments will be enjoyed. Thanks 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 19 17:34:39 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18vgWV-0007Bs-00; Wed, 19 Mar 2003 17:34:39 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 1EFCC1112F3; Wed, 19 Mar 2003 17:33:00 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA24771 for linac-eng-list; Wed, 19 Mar 2003 09:52:54 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from fep01.biz.rr.com (fep01.biz.rr.com [24.30.200.200]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA24766 for ; Wed, 19 Mar 2003 09:52:52 -0600 (CST) Received: from pent4 ([24.174.72.124]) by fep01.biz.rr.com with ESMTP id <20030319155252.EAYQ1471.fep01.biz.rr.com@pent4> for ; Wed, 19 Mar 2003 10:52:52 -0500 From: "Thomas McCausland" To: "linac-eng \"Steve Robinson\"" Date: Wed, 19 Mar 2003 09:52:16 -0600 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: Re: RF Driver Replacements Reply-To: acceltek@acceltekservice.com Message-ID: <3E783DD0.19675.58FBF1@localhost> In-reply-to: <2617828127B3A34CB94408B1507E9EEA7537AD@hccexch.harringtoncc.org> X-mailer: Pegasus Mail for Win32 (v3.12c) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Thomas McCausland" To: "linac-eng \"Steve Robinson\"" Date: Wed, 19 Mar 2003 09:52:16 -0600 Subject: Re: RF Driver Replacements Reply-To: acceltek@acceltekservice.com In-reply-to: <2617828127B3A34CB94408B1507E9EEA7537AD@hccexch.harringtoncc.org> Sender: owner-linac-eng@plato.aristotle.net > Hello to my fellow collages, > I have an RF Driver problem which will require replacement. On an > intermittent basic, output drops to 6-7 MU per minute. The event log > shows the RF DRV MTR was somewhere between 17-19 when it should read > approx. 41. I have had the opportunity to observe this phenomenon > once and the RF DRV MTR reading made a slow climb from 12 up to > approx. 20 the it jumped to a normal reading. I am not sure of any > other practices except replacement for this problem. I would thank > any input to the repair of this unit but I feel that replacement may > be my only recourse. I had seen on occasion of other sources for > replacement other than Varian and I would like to contact these > people. If someone could forward phone numbers I need to start > contacting them before I face total system failure. All other > comments will be enjoyed. > Thanks Steve, Procomm both repairs drivers and sells their model of replacement drivers. Their number is 732-206-0060. Also, depending on the model of your machine, we have a Procomm driver availible in stock for a Varian. We also have some Siemens drivers. If your interested, give us a call. I'd check too that your AFC system is not giving you problems..AFC problems could also be driver related of course, but make sure the rest of the AFC system isn't the source of the problem. Thomas W. McCausland AccelTek Inc. 281-652-0059 888-619-8811 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 19 21:34:08 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18vkGG-0007st-00; Wed, 19 Mar 2003 21:34:08 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 554151112F3; Wed, 19 Mar 2003 21:32:30 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id NAA29468 for linac-eng-list; Wed, 19 Mar 2003 13:57:07 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from hccexch.harringtoncc.org ([207.19.3.226]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id NAA29464 for ; Wed, 19 Mar 2003 13:57:03 -0600 (CST) content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Subject: RF Driver Replacement X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Wed, 19 Mar 2003 13:54:31 -0600 Message-ID: <2617828127B3A34CB94408B1507E9EEA7537AE@hccexch.harringtoncc.org> Thread-Topic: RF Driver Replacement Thread-Index: AcLuUbSiRTToP1hCEdeYSwABAyeA7w== From: "Steve Robinson" To: Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id NAA29465 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f content-class: urn:content-classes:message Subject: RF Driver Replacement X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Wed, 19 Mar 2003 13:54:31 -0600 Thread-Topic: RF Driver Replacement Thread-Index: AcLuUbSiRTToP1hCEdeYSwABAyeA7w== From: "Steve Robinson" To: X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id NAA29465 Sender: owner-linac-eng@plato.aristotle.net Thanks to the many people that have replied to my request. I am going to give the repair option a try. It seems the most cost effective. I just hope that I get the longevity out of it that I wish. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 19 21:34:37 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18vkGj-0007sy-00; Wed, 19 Mar 2003 21:34:37 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A4FBD1112F3; Wed, 19 Mar 2003 21:32:59 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA29523 for linac-eng-list; Wed, 19 Mar 2003 14:01:22 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA29519 for ; Wed, 19 Mar 2003 14:01:14 -0600 (CST) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h2JK0CGG000738 for ; Thu, 20 Mar 2003 08:00:16 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Thu, 20 Mar 2003 08:55:22 -0600 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Thu, 20 Mar 2003 07:59:54 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Thu, 20 Mar 2003 07:59:50 +1200 From: "Dave Pinchin" To: , Subject: Re: RF Driver Replacements Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 20 Mar 2003 07:59:50 +1200 From: "Dave Pinchin" To: , Subject: Re: RF Driver Replacements Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day Steve, I have seen two modes of variable output of RF drivers ( apart from the 'old age - gettting tired' ). 1/ #40 - C1a Saturated klystron. Cause - cooling fan on RF driver. Output rise on fan seizing. 2/ #1164 - C3 KLM. Some of the monitoring plumbing was loose. On the the back of the unit there is some plumbing which monitors the output and connects it to the console. It also feeds the RF driver output servo system. Hope this helps Dave :D >>> "Steve Robinson" 20/03/03 01:53:34 >>> Hello to my fellow collages, I have an RF Driver problem which will require replacement. On an intermittent basic, output drops to 6-7 MU per minute. The event log shows the RF DRV MTR was somewhere between 17-19 when it should read approx. 41. I have had the opportunity to observe this phenomenon once and the RF DRV MTR reading made a slow climb from 12 up to approx. 20 the it jumped to a normal reading. I am not sure of any other practices except replacement for this problem. I would thank any input to the repair of this unit but I feel that replacement may be my only recourse. I had seen on occasion of other sources for replacement other than Varian and I would like to contact these people. If someone could forward phone numbers I need to start contacting them before I face total system failure. All other comments will be enjoyed. Thanks ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Mar 20 11:30:31 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18vxJf-0004T1-00; Thu, 20 Mar 2003 11:30:31 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id C61711112F3; Thu, 20 Mar 2003 11:28:41 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id EAA13720 for linac-eng-list; Thu, 20 Mar 2003 04:04:04 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail9.nhs.uk (mail9.nhs.uk [213.120.235.87]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id EAA13716 for ; Thu, 20 Mar 2003 04:04:02 -0600 (CST) Received: from [194.62.42.123] (helo=relayint1.nhs.uk) by mail9.nhs.uk with esmtp (Exim 4.10) id 18vwtX-0005Mr-00 for linac-eng@plato.aristotle.net; Thu, 20 Mar 2003 10:03:31 +0000 Received: from relay.nhs.uk (194.62.42.142) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E6077120036137F for linac-eng@plato.aristotle.net; Thu, 20 Mar 2003 10:03:31 +0000 Received: from smtp.koc.mtw-tr.nhs.uk (212.196.163.36) by relay.nhs.uk (Syntegra-2 7.0.008) id 3E7751B900084CEA; Thu, 20 Mar 2003 10:03:31 +0000 Received: from ns2.onc.koc.mtw-tr.nhs.uk (pat.koc.mtw-tr.nhs.uk [192.168.1.253]) by smtp.koc.mtw-tr.nhs.uk (8.11.6/8.11.6) with ESMTP id h2KA41v20897; Thu, 20 Mar 2003 10:04:02 GMT Received: from ws135 (ws135.onc.koc.mtw-tr.nhs.uk [192.168.2.163]) by ns2.onc.koc.mtw-tr.nhs.uk (8.11.6/8.11.6) with SMTP id h2K9uRU10085; Thu, 20 Mar 2003 09:56:27 GMT From: "David Fenn" To: "'Bob Huff'" , Subject: RE: KSOL Date: Thu, 20 Mar 2003 10:03:22 -0000 Message-ID: <000e01c2eec7$f1e64da0$a302a8c0@onc.koc.mtwtr.nhs.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Importance: Normal In-Reply-To: <20030313184923.61964.qmail@mail.com> Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "David Fenn" To: "'Bob Huff'" , Subject: RE: KSOL Date: Thu, 20 Mar 2003 10:03:22 -0000 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Importance: Normal In-Reply-To: <20030313184923.61964.qmail@mail.com> Sender: owner-linac-eng@plato.aristotle.net Hi Bob! This is a familiar story to us! The KSOL psu is a constant current device which is why you see the voltage dropping. Ours dropped to the same sort of value as yours and we were then into the nulling of the interlock just like you. We were advised by Varian to check the resistance of the coil at 20 degrees and compare this with the nameplate value. As suspected this had decreased by 20%. We drilled the usual hole to drain any water (see previous postings on this subject) but our well was dry! We then concluded we had shorted turns and replaced the solenoid. This was sourced from RadParts and the voltage returned to the correct level after installation. We did the job ourselves and it took us 2men 4 hours Best regards and good luck David Fenn Kent Oncology Centre Maidstone UK -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Bob Huff Sent: 13 March 2003 18:49 To: linac-eng@plato.aristotle.net Subject: KSOL Hello, Twice this month I've had to adjust the KSOL interlock null in the Aux Elect Chassis. I haven't had a KSOL fault, but when I've tried to beam on, the beam instantly shuts off and goes back to "ready" state. The value for the KSOL null on the "catch all" pcb in the aux chassis was -217mv. Once I null this out, the machine runs fine. I've notice that the KSOL power supply is only 94.4v, 35.3A. This voltage seems low, and the only record of the meters was at 103.8v, taken some time ago. My question.... has anyone seen this power supply drift? Is it adjustable/repairable? Any input is greatly appreciated. Bob Huff -- __________________________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Mar 20 19:39:19 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18w4wh-0000sJ-00; Thu, 20 Mar 2003 19:39:19 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A6D6C1112F7; Thu, 20 Mar 2003 19:37:32 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA19447 for linac-eng-list; Thu, 20 Mar 2003 12:02:33 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mailhost.chi1.ameritech.net (mailhost1-chcgil.chcgil.ameritech.net [206.141.192.67]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA19443 for ; Thu, 20 Mar 2003 12:02:32 -0600 (CST) Received: from SeanFrigo ([64.108.146.17]) by mailhost.chi1.ameritech.net (InterMail vM.4.01.02.17 201-229-119) with SMTP id <20030320180231.WOQX11905.mailhost.chi1.ameritech.net@SeanFrigo> for ; Thu, 20 Mar 2003 12:02:31 -0600 Message-ID: <004101c2ef0a$e03757f0$9601a8c0@SeanFrigo> From: "Sean Frigo" To: "Linac-eng List" Subject: Varian 21EX beam energy designation Date: Thu, 20 Mar 2003 12:02:30 -0600 Organization: Southern WI Radiotherapy Ctr. MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Sean Frigo" To: "Linac-eng List" Subject: Varian 21EX beam energy designation Date: Thu, 20 Mar 2003 12:02:30 -0600 Organization: Southern WI Radiotherapy Ctr. X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Hi listers, We are taking delivery of a new Varian 21EX. We can get the high energy x-ray beam labeled as 18 MV or 23 MV. If I understand correctly, in either case, the electron beam hitting the target has the same energy spectrum, and hence the x-ray spectrum out of the target is the same. The only difference is in the how one interprets the resulting percent depth dose curve in water. The definition is in BJR reports 11, 17, and 25. I heard there once was a billing and reimbursement advantage to this, and so the linac manufacturers targeted their sales and marketing to this, as well as presenting a "mine is bigger" aura. However, with the billing advantage gone, I was wondering if there was anything on the machine side that would argue in favor of the 23 MV designation? For example, can one get 23 MeV electrons and hence 23 MV photons out by sufficiently tuning the bend magnet? In this situation, what do people typically label their machines, 18 MV or 23 MV? Thanks in advance. Sean 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Mar 20 20:59:09 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18w6Bx-0000yG-00; Thu, 20 Mar 2003 20:59:09 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 231481112F7; Thu, 20 Mar 2003 20:57:26 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id NAA21271 for linac-eng-list; Thu, 20 Mar 2003 13:32:51 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id NAA21267 for ; Thu, 20 Mar 2003 13:32:48 -0600 (CST) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Thu, 20 Mar 2003 15:31:04 -0400 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.4.1 Date: Thu, 20 Mar 2003 15:30:54 -0400 From: "Scott Purcell" To: Subject: Linac hand pendant Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id NAA21268 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 20 Mar 2003 15:30:54 -0400 From: "Scott Purcell" To: Subject: Linac hand pendant Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id NAA21268 Sender: owner-linac-eng@plato.aristotle.net Hi To All Does anyone know if Varian uses the shift & then number pad on the linac hand pendants for a clinical machine. I am checking the data stream for each key stoke and nothing shows for these keys. Any help would be appreciated. Cheers Scott Scott Purcell, C.E.T Linear Accelerator Service Technologist Department of Medical Physics Nova Scotia Cancer Centre 5820 University Avenue Halifax, Nova Scotia Canada Email scott.purcell@cdha.nshealth.ca Phone: 902-473-2563 Fax: 902-473-6120 This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Mar 20 21:56:43 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18w75f-00012T-00; Thu, 20 Mar 2003 21:56:43 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id BB47D1112F3; Thu, 20 Mar 2003 21:55:00 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id OAA22226 for linac-eng-list; Thu, 20 Mar 2003 14:09:57 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail4.nhs.uk (mail4.nhs.uk [194.72.23.241]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA22222 for ; Thu, 20 Mar 2003 14:09:55 -0600 (CST) Received: from hn-ext by mail4.nhs.uk (Sendmail 8.8.8) with esmtp id 18w6Lo-0000AW-00; Thu, 20 Mar 2003 20:09:20 +0000 Received: from relay.nhs.uk (194.62.42.142) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E6077120038DED2 for linac-eng@plato.aristotle.net; Thu, 20 Mar 2003 20:09:20 +0000 Received: from relay.wales.nhs.uk (194.189.180.1) by relay.nhs.uk (Syntegra-2 7.0.008) id 3E7751B9000DA4BC for linac-eng@plato.aristotle.net; Thu, 20 Mar 2003 20:09:20 +0000 X-Internal-ID: 3E72149100032EB6 Received: from ygc-mail.cd-tr.wales.nhs.uk (131.3.9.10) by relay.wales.nhs.uk (NPlex 2.0.108) for linac-eng@plato.aristotle.net; 20 Mar 2003 20:08:25 +0000 Received: by YGC-MAIL with Internet Mail Service (5.5.2653.19) id ; Thu, 20 Mar 2003 20:09:42 -0000 Message-ID: <4BD1673C955CD41182DA00508BACF2DF01BD51F8@YGC-MAIL> From: "Jordan, Tom" To: Linac-eng List Subject: RE: Varian 21EX beam energy designation Date: Thu, 20 Mar 2003 20:09:37 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f X-Internal-ID: 3E72149100032EB6 From: "Jordan, Tom" To: Linac-eng List Subject: RE: Varian 21EX beam energy designation Date: Thu, 20 Mar 2003 20:09:37 -0000 Sender: owner-linac-eng@plato.aristotle.net As the author of BJR supplement 25, I would recommend you ignore the higher spec. figure that appears in supplement 17. How it worked was that supplement 17, 20 years ago took real data submitted by people and used the MV value used by those contributors to publish depth dose that reflected what was really happening. However inevitably the spread on those values was huge, and at the higher energies there was little data so it was easily biased. In supplemnt 25 I used a more organised basis from published work spurred by supplement 17. This is not dissimilar to the current Varian definitions [BJR Dose at 10cm deep, (100fsd to suface 10x10cm surface field) is 79% for 18MV, and about 82% for 23MV). It is important for standardisation (and selection of appropriate calibration factors) that we move towards similar definitions. The AAPM reports will be quite clear on this. Then we do clinical trials we are talking the same language. For the higher energies manufacturers do tend to use electrons with lower nominal energies, thin targets and judicious choice of low atomic no. filters to absorb the bottom end of the X-ray spectrum and give a depth dose similar to higher energies. Tom Jordan T J Jordan Acting Director of Medical Physics North Wales Medical Physics Conwy &Denbighshire NHS Trust Bodelwyddan Denbighshire LL18 5UJ Tel. 01745 445111, Fax. 01745 445103 This email is confidential and intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. You are requested to inform the sender of the incorrect delivery. Any views or opinions presented are to be understood as those of the author and do not necessarily represent those of Conwy and Denbighshire NHS Trust. This message and any attached files will have been checked with virus detection software before transmission. However, the recipient must carry out their own virus checks before opening any attachment. Conwy and Denbighshire NHS Trust accepts no liability for any loss or damage which may be caused by software viruses. > -----Original Message----- > From: Sean Frigo [SMTP:sfrigo@smrif.com] > Sent: 20 March 2003 18:03 > To: Linac-eng List > Subject: Varian 21EX beam energy designation > > Hi listers, > > We are taking delivery of a new Varian 21EX. We can get the high energy > x-ray beam labeled as 18 MV or 23 MV. If I understand correctly, in either > case, the electron beam hitting the target has the same energy spectrum, > and > hence the x-ray spectrum out of the target is the same. The only > difference > is in the how one interprets the resulting percent depth dose curve in > water. The definition is in BJR reports 11, 17, and 25. > > I heard there once was a billing and reimbursement advantage to this, and > so > the linac manufacturers targeted their sales and marketing to this, as > well > as presenting a "mine is bigger" aura. However, with the billing advantage > gone, I was wondering if there was anything on the machine side that would > argue in favor of the 23 MV designation? For example, can one get 23 MeV > electrons and hence 23 MV photons out by sufficiently tuning the bend > magnet? > > In this situation, what do people typically label their machines, 18 MV or > 23 MV? > > Thanks in advance. > > Sean 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 21 00:23:28 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18w9Ng-0001C6-00; Fri, 21 Mar 2003 00:23:28 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 9BBD31112F3; Fri, 21 Mar 2003 00:21:42 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id QAA29623 for linac-eng-list; Thu, 20 Mar 2003 16:50:36 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from clift.nettas.net (clift.nettas.net [202.7.15.71]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA29618 for ; Thu, 20 Mar 2003 16:50:33 -0600 (CST) Received: from dchs6305.dchs.tas.gov.au ([147.109.23.26]) by clift.nettas.net (8.12.7/8.12.7) with ESMTP id h2KMpZ6r010827 for ; Fri, 21 Mar 2003 09:51:35 +1100 (EST) Received: by DCHS6305 with Internet Mail Service (5.5.2655.55) id ; Fri, 21 Mar 2003 09:50:11 +1100 Message-ID: From: Causby Damian To: "'linac-eng@plato.aristotle.net'" Subject: Blown clipper diodes Date: Fri, 21 Mar 2003 09:50:07 +1100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Causby Damian To: "'linac-eng@plato.aristotle.net'" Subject: Blown clipper diodes Date: Fri, 21 Mar 2003 09:50:07 +1100 Sender: owner-linac-eng@plato.aristotle.net Hi all I am having problems with the clipper diodes blowing on our 2100 C2 linac Also having a problem warming up some mornings 6e or 9e have low or no dose rate, Mostly only happens when Im not there, The last set of clipper diodes only lasted 48 hours and took out the MOVs as well. Machine is runner perfectly at present. Damian Causby Engineering Operations Manager W.P. Holman Clinic Launceston General Hospital TAS, AUSTRALIA ph 03 6348 7151 fax 03 6361 6371 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 21 09:46:01 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18wIA4-0002ui-00; Fri, 21 Mar 2003 09:46:00 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 047251112F3; Fri, 21 Mar 2003 09:44:15 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id CAA16209 for linac-eng-list; Fri, 21 Mar 2003 02:22:52 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from lisa.cityu.edu.hk (lisa.cityu.edu.hk [144.214.5.205]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id CAA16205 for ; Fri, 21 Mar 2003 02:22:50 -0600 (CST) Received: from conversion-daemon.alumni.cityu.edu.hk by alumni.cityu.edu.hk (iPlanet Messaging Server 5.1 HotFix 1.9 (built Dec 3 2002)) id <0HC300001AW128@alumni.cityu.edu.hk> for linac-eng@plato.aristotle.net; Fri, 21 Mar 2003 16:21:59 +0800 (CST) Received: from alumni.cityu.edu.hk (ppp221233.cityu.edu.hk [144.214.221.233]) by alumni.cityu.edu.hk (iPlanet Messaging Server 5.1 HotFix 1.9 (built Dec 3 2002)) with ESMTP id <0HC300GP0B7ZIZ@alumni.cityu.edu.hk> for linac-eng@plato.aristotle.net; Fri, 21 Mar 2003 16:21:37 +0800 (CST) Date: Fri, 21 Mar 2003 16:24:30 +0800 From: Jonathan Chan Subject: Re: Blown clipper diodes To: linac eng Reply-To: Sui_Keung.Chan@alumni.cityu.edu.hk Message-id: <3E7ACC3E.2000609@alumni.cityu.edu.hk> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=us-ascii Content-transfer-encoding: 7BIT X-Accept-Language: en-us, en, zh-hk, zh-tw, zh-cn User-Agent: Mozilla/5.0 (Windows; U; Win95; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 References: Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 21 Mar 2003 16:24:30 +0800 From: Jonathan Chan Subject: Re: Blown clipper diodes To: linac eng Reply-To: Sui_Keung.Chan@alumni.cityu.edu.hk X-Accept-Language: en-us, en, zh-hk, zh-tw, zh-cn Sender: owner-linac-eng@plato.aristotle.net Damain, Checked if there is any HV arcing. The MOD fault detection may have failed, thus preventing the MOD fault to terminate the beam before the arc current distroy you end-clipper diodes and MOVs. Good Luck, Jonathan Chan QUEEN MARY HOSPITAL HONG KONG Causby Damian wrote: > Hi all > I am having problems with the clipper diodes blowing on our 2100 C2 > linac Also having a problem warming up some mornings 6e or 9e have low or > no dose rate, Mostly only happens when Im not there, > The last set of clipper diodes only lasted 48 hours and took out the MOVs as > well. > Machine is runner perfectly at present. > > Damian Causby > Engineering Operations Manager > W.P. Holman Clinic > Launceston General Hospital > TAS, AUSTRALIA > ph 03 6348 7151 > fax 03 6361 6371 > > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Sat Mar 22 17:57:40 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18wmJQ-0002N3-00; Sat, 22 Mar 2003 17:57:40 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 9AC121112FC; Sat, 22 Mar 2003 17:55:47 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA29771 for linac-eng-list; Sat, 22 Mar 2003 10:30:46 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-d07.mx.aol.com (imo-d07.mx.aol.com [205.188.157.39]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA29767 for ; Sat, 22 Mar 2003 10:30:44 -0600 (CST) From: GARRYANGEL@aol.com Received: from GARRYANGEL@aol.com by imo-d07.mx.aol.com (mail_out_v34.21.) id y.1a6.12368406 (3996) for ; Sat, 22 Mar 2003 11:29:52 -0500 (EST) Message-ID: <1a6.12368406.2bade980@aol.com> Date: Sat, 22 Mar 2003 11:29:52 EST Subject: Interesting Effect!!! To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_1a6.12368406.2bade980_boundary" X-Mailer: 8.0 for Windows sub 6014 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: GARRYANGEL@aol.com Date: Sat, 22 Mar 2003 11:29:52 EST Subject: Interesting Effect!!! To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_1a6.12368406.2bade980_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Everyone ... Well, I thought I had seen everyting over the years, however, I just saew something new.Replaced a Magnetron on a Cl-6/100, aligning AFC, etc ...Everthhing looked very acceptable. Re-installed the "Gantry cage" and checkiung operation one last time. Fortunately, the scope had not been disconnected and I noticed that there was significant Magnetron current pulse degradation on the "leading" portion of the pulse top. I was a "Classic" high voltage corona issue. Removing the metal shield on the Magnetron side of the cage alleviated the problem. At a loss to explain why this would occur with a replacement maggie. Has anyone else out there seen this effect? Garry --part1_1a6.12368406.2bade980_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi Everyone ...

Well, I thought I had seen everyting over the years, however, I just saew so= mething new.Replaced a Magnetron on a Cl-6/100, aligning AFC, etc ...E= verthhing looked very acceptable. Re-installed the "Gantry cage" and checkiu= ng operation one last time. Fortunately, the scope had not been disconnected= and I noticed that there was significant Magnetron current pulse degradatio= n on the "leading" portion of the pulse top. I was a "Classic" high voltage=20= corona issue. Removing the metal shield on the Magnetron side of the cage al= leviated the problem. At a loss to explain why this would occur with a repla= cement maggie.

Has anyone else out there seen this effect?

Garry --part1_1a6.12368406.2bade980_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Sun Mar 23 22:47:39 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xDJa-0004lN-00; Sun, 23 Mar 2003 22:47:38 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 515861112FA; Sun, 23 Mar 2003 22:45:39 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id PAA17997 for linac-eng-list; Sun, 23 Mar 2003 15:19:39 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA17992 for ; Sun, 23 Mar 2003 15:19:35 -0600 (CST) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h2NLJ6ov021509 for ; Mon, 24 Mar 2003 09:19:07 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Mon, 24 Mar 2003 10:13:56 -0600 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Mon, 24 Mar 2003 09:18:47 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Mon, 24 Mar 2003 09:18:41 +1200 From: "Dave Pinchin" To: , Subject: Re: Interesting Effect!!! Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 24 Mar 2003 09:18:41 +1200 From: "Dave Pinchin" To: , Subject: Re: Interesting Effect!!! Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day Garry, Never seen anything like it myself. But using basic principles I can only surmise that the new mag has sharper corners. Or perhaps in the install some of the wires were placed closer to the metal shield. Good forum subject. Any other responders out there??? Dave >>> 23/03/03 04:29:52 >>> Hi Everyone ... Well, I thought I had seen everyting over the years, however, I just saew something new.Replaced a Magnetron on a Cl-6/100, aligning AFC, etc ...Everthhing looked very acceptable. Re-installed the "Gantry cage" and checkiung operation one last time. Fortunately, the scope had not been disconnected and I noticed that there was significant Magnetron current pulse degradation on the "leading" portion of the pulse top. I was a "Classic" high voltage corona issue. Removing the metal shield on the Magnetron side of the cage alleviated the problem. At a loss to explain why this would occur with a replacement maggie. Has anyone else out there seen this effect? Garry ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. 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Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 24 00:53:01 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xFGv-0004ro-00; Mon, 24 Mar 2003 00:53:01 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 644A91112FA; Mon, 24 Mar 2003 00:50:55 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA19668 for linac-eng-list; Sun, 23 Mar 2003 17:32:39 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from gondor.dpa.act.gov.au (gondor.dpa.act.gov.au [136.153.2.50]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA19664 for ; Sun, 23 Mar 2003 17:32:36 -0600 (CST) Received: (from smap@localhost) by gondor.dpa.act.gov.au (8.11.1/8.11.1) id h2NNWTW13007 for ; Mon, 24 Mar 2003 10:32:29 +1100 (EST) Received: from unknown(10.226.2.7) by gondor via smap (V5.5) id xma012580; Mon, 24 Mar 03 10:31:56 +1100 Received: by cal007.dpa.act.gov.au with Internet Mail Service (5.5.2653.19) id ; Mon, 24 Mar 2003 10:31:33 +1000 Message-ID: <2FC7DBCD6D6AD611AD7B0090278CABAEE79DA2@cal036.act.gov.au> From: "Caunt, Peter" To: "Linac Eng (E-mail)" Subject: Interesting effect Date: Mon, 24 Mar 2003 10:14:19 +1000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Caunt, Peter" To: "Linac Eng (E-mail)" Subject: Interesting effect Date: Mon, 24 Mar 2003 10:14:19 +1000 Sender: owner-linac-eng@plato.aristotle.net Garry, The old 6/100 workhorse still throws up some interesting problems. Although our department's 6/100 was replaced a few years ago, I do remember similar problems specific to a replacement magnetron. >From memory, for many years no problem post magnetron change and then mag I stability became a problem. The solution, Varian produced a RF conductive collar that fitted the insulated neck of the magnetron to reduce parasitic oscillations - and the problem just went away. Provided this collar was secured proximal to the magnetron mounting plate with cable ties, arcing was never an issue. The next changed magnetron did not exhibit stability problems and the collar was not needed. You might like to try this if you think it would help, its a relatively painless process (cost and install). If Varian cannot find the part number email me and I will track down a number for you. Kind Regards, Peter Caunt Radiation Oncology The Canberra Hospital Canberra Australia. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 24 16:02:17 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xTSq-00040l-00; Mon, 24 Mar 2003 16:02:17 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 665C81112FB; Mon, 24 Mar 2003 16:00:13 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id IAA29138 for linac-eng-list; Mon, 24 Mar 2003 08:33:05 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICI2.Partners.org (phsexchici2.partners.org [170.223.254.21]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA29134 for ; Mon, 24 Mar 2003 08:33:03 -0600 (CST) Received: by phsexchici2.partners.org with Internet Mail Service (5.5.2655.55) id ; Mon, 24 Mar 2003 09:32:28 -0500 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F13C@phsexch6.partners.org> From: "Maddox, Buford J" To: "'GARRYANGEL@aol.com'" , linac-eng@plato.aristotle.net Subject: RE: Interesting Effect!!! Date: Mon, 24 Mar 2003 09:32:27 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F212.315638A4" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'GARRYANGEL@aol.com'" , linac-eng@plato.aristotle.net Subject: RE: Interesting Effect!!! Date: Mon, 24 Mar 2003 09:32:27 -0500 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2F212.315638A4 Content-Type: text/plain; charset="iso-8859-1" Haven't seen this on my 1982 6-100. In addition to the other suggestions, I would be sure the Despiking network is ok. If too fast a rise time is allowed, voltage will spike at the beginning of the pulse and/or the magnetron may start poorly with arcing or moding. I have used 1/8 " of plexiglas on metal mesh covers where I had to put them too close to a homebrew PFN. OK for corona, but a fire hazard for heavy continuous arcing (note PFN coil is on plastic). I have seen a maggie with bad connections in the top generate lots of electrical noise, affecting many things in the room, with some corona. Similar effects with a new thyratron once. Worried about patient devices that time. Most arcing maggies will generate corona on the insulator, visible with lights off. Nice show. Fun topic. Jerry -----Original Message----- From: GARRYANGEL@aol.com [mailto:GARRYANGEL@aol.com] Sent: Saturday, March 22, 2003 11:30 AM To: linac-eng@plato.aristotle.net Subject: Interesting Effect!!! Hi Everyone ... Well, I thought I had seen everyting over the years, however, I just saew something new.Replaced a Magnetron on a Cl-6/100, aligning AFC, etc ...Everthhing looked very acceptable. Re-installed the "Gantry cage" and checkiung operation one last time. Fortunately, the scope had not been disconnected and I noticed that there was significant Magnetron current pulse degradation on the "leading" portion of the pulse top. I was a "Classic" high voltage corona issue. Removing the metal shield on the Magnetron side of the cage alleviated the problem. At a loss to explain why this would occur with a replacement maggie. Has anyone else out there seen this effect? Garry ------_=_NextPart_001_01C2F212.315638A4 Content-Type: text/html; charset="iso-8859-1"

Haven't seen this on my 1982 6-100. In addition to the other suggestions, I would be sure the Despiking network is ok. If too fast a rise time is allowed, voltage will spike at the beginning of the pulse and/or the magnetron may start poorly with arcing or moding. I have used 1/8 " of plexiglas on metal mesh covers where I had to put them too close to a homebrew PFN. OK for corona, but a fire hazard for heavy continuous arcing (note PFN coil is on plastic). I have seen a maggie with bad connections in the top generate lots of electrical noise, affecting many things in the room, with some corona. Similar effects with a new thyratron once. Worried about patient devices that time. Most arcing maggies will generate corona on the insulator, visible with lights off. Nice show.

Fun topic.

Jerry

-----Original Message-----
From: GARRYANGEL@aol.com [mailto:GARRYANGEL@aol.com]
Sent: Saturday, March 22, 2003 11:30 AM
To: linac-eng@plato.aristotle.net
Subject: Interesting Effect!!!

Hi Everyone ...

Well, I thought I had seen everyting over the years, however, I just saew something new.Replaced a Magnetron on a Cl-6/100, aligning AFC, etc ...Everthhing looked very acceptable. Re-installed the "Gantry cage" and checkiung operation one last time. Fortunately, the scope had not been disconnected and I noticed that there was significant Magnetron current pulse degradation on the "leading" portion of the pulse top. I was a "Classic" high voltage corona issue. Removing the metal shield on the Magnetron side of the cage alleviated the problem. At a loss to explain why this would occur with a replacement maggie.

Has anyone else out there seen this effect?

Garry

------_=_NextPart_001_01C2F212.315638A4-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 24 17:08:44 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xUVA-0005Pa-00; Mon, 24 Mar 2003 17:08:44 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8DF3A1112FB; Mon, 24 Mar 2003 17:06:41 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id JAA00324 for linac-eng-list; Mon, 24 Mar 2003 09:36:51 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail8.nhs.uk (mail8.nhs.uk [213.120.235.86]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA00320 for ; Mon, 24 Mar 2003 09:36:49 -0600 (CST) Received: from [194.62.42.123] (helo=relayint1.nhs.uk) by mail8.nhs.uk with esmtp (Exim 4.10) id 18xTzm-0001Lg-00 for linac-eng@plato.aristotle.net; Mon, 24 Mar 2003 15:36:18 +0000 Received: from relay.nhs.uk (194.62.42.143) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E60771200407364 for linac-eng@plato.aristotle.net; Mon, 24 Mar 2003 15:36:18 +0000 Received: from stobhill-01.NorthGlasgow.scot.nhs.uk (10.249.0.14) by relay.nhs.uk (Syntegra-3 7.0.008) id 3E7751CA001B6221 for linac-eng@plato.aristotle.net; Mon, 24 Mar 2003 15:36:18 +0000 Received: by Stobhill-01 with Internet Mail Service (5.5.2650.21) id ; Mon, 24 Mar 2003 15:35:51 -0000 Message-ID: <5D4FCC9BE31DD511B96600508BB9D2CF1B5518@NORTHNET-09> From: "Inglis, John" To: "'linac-eng@plato.aristotle.net'" Subject: gantry drive assembly on 600C Date: Mon, 24 Mar 2003 15:35:51 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F21B.0CC43820" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Inglis, John" To: "'linac-eng@plato.aristotle.net'" Subject: gantry drive assembly on 600C Date: Mon, 24 Mar 2003 15:35:51 -0000 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2F21B.0CC43820 Content-Type: text/plain; charset="iso-8859-1" Information for anyone who services Varian 600c linacs. We have recently experienced a complete failure of the gantry drive gearbox mounting bracket assembly. This was a result of the bolts, used to attach the bracket to the main linac stand frame, shearing. All, but one, of the bolts sheared allowing the bracket to split at the last remaining bolt hole. The only thing stopping the gantry from free moving was the drive chain jamming up in the system. (Damage was also inflicted on the gantry rotation readout assembly). The bolts holding the gearbox bracket have, on at least two other occasions, sheared on the same linac. Another 600c, about the same age ( 6-7 years) had on one occasion at least one bolt damaged. Newer Linacs appear to have heavier bolts fitted, so we modified the fitting to take larger diameter bolts in the hope this will stop the failure. Has anyone experienced a similar problem? John Inglis MTO 4*** Glasgow _________________________________________________________________ The information contained within this e-mail and in any attachments is confidential and may be privileged. If you are not the intended recipient, please destroy this message, delete any copies held on your systems and notify the sender immediately. You should not retain, copy or use this e-mail for any purpose, nor disclose all or any part of its content to any other person. All messages passing through this gateway are checked for viruses but we strongly recommend that you check for viruses using your own virus scanner as North Glasgow University Hospitals NHS Trust will not take responsibility for any damage caused as a result of virus infection. ------_=_NextPart_001_01C2F21B.0CC43820 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable gantry drive assembly on 600C

Information for anyone who services = Varian 600c linacs. We have recently experienced a complete failure of = the gantry drive gearbox mounting bracket assembly. This was a result = of the bolts, used to attach the bracket to the main linac stand frame, = shearing. All, but one, of the bolts sheared allowing the bracket to = split at the last remaining bolt hole. The only thing stopping the = gantry from free moving was the drive chain jamming up in the system. = (Damage was also inflicted on the gantry rotation readout = assembly).

The bolts holding the gearbox bracket = have, on at least two other occasions, sheared on the same linac. = Another 600c, about the same age ( 6-7 years) had on one occasion at = least one bolt damaged.

Newer Linacs appear to have heavier = bolts fitted, so we modified the fitting to take larger diameter bolts = in the hope this will stop the failure.

Has anyone experienced a similar = problem?

John Inglis
MTO 4***
Glasgow

_________________________________________________________= ________
The information contained within this = e-mail and in any
attachments is confidential and may = be privileged. If you are
not the intended recipient, please = destroy this message, delete
any copies held on your systems and = notify the sender immediately.
You should not retain, copy or use = this e-mail for any purpose,
nor disclose all or any part of its = content to any other person.
All messages passing through this = gateway are checked for viruses
but we strongly recommend that you = check for viruses using your
own virus scanner as North Glasgow = University Hospitals NHS Trust
will not take responsibility for any = damage caused as a result of
virus infection.

------_=_NextPart_001_01C2F21B.0CC43820-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 24 19:03:36 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xWIK-0005kb-00; Mon, 24 Mar 2003 19:03:36 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 801781112FD; Mon, 24 Mar 2003 19:01:29 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id LAA02678 for linac-eng-list; Mon, 24 Mar 2003 11:25:52 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail2.vcu.edu (mail2.vcu.edu [128.172.1.135]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id LAA02674 for ; Mon, 24 Mar 2003 11:25:50 -0600 (CST) Received: from hsc.vcu.edu ([208.31.209.254]) by mail2.vcu.edu (8.12.0/8.11.3) with ESMTP id h2OHPdTg387970; Mon, 24 Mar 2003 12:25:39 -0500 Message-ID: <3E7F3FA6.40302@hsc.vcu.edu> Date: Mon, 24 Mar 2003 12:25:58 -0500 From: "Christopher L. Bartee" User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.2.1) Gecko/20021130 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Inglis, John" Cc: "'linac-eng@plato.aristotle.net'" Subject: Re: gantry drive assembly on 600C References: <5D4FCC9BE31DD511B96600508BB9D2CF1B5518@NORTHNET-09> In-Reply-To: <5D4FCC9BE31DD511B96600508BB9D2CF1B5518@NORTHNET-09> Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 24 Mar 2003 12:25:58 -0500 From: "Christopher L. Bartee" X-Accept-Language: en-us, en To: "Inglis, John" Cc: "'linac-eng@plato.aristotle.net'" Subject: Re: gantry drive assembly on 600C In-Reply-To: <5D4FCC9BE31DD511B96600508BB9D2CF1B5518@NORTHNET-09> Sender: owner-linac-eng@plato.aristotle.net Inglis, John wrote:

gantry drive assembly on 600C
Information for anyone who services Varian 600c linacs. We have recently experienced a complete failure of the gantry drive gearbox mounting bracket assembly. This was a result of the bolts, used to attach the bracket to the main linac stand frame, shearing. All, but one, of the bolts sheared allowing the bracket to split at the last remaining bolt hole. The only thing stopping the gantry from free moving was the drive chain jamming up in the system. (Damage was also inflicted on the gantry rotation readout assembly).

The bolts holding the gearbox bracket have, on at least two other occasions, sheared on the same linac. Another 600c, about the same age ( 6-7 years) had on one occasion at least one bolt damaged.

Newer Linacs appear to have heavier bolts fitted, so we modified the fitting to take larger diameter bolts in the hope this will stop the failure.

Has anyone experienced a similar problem?

John Inglis
MTO 4***
Glasgow

_________________________________________________________________
The information contained within this e-mail and in any
attachments is confidential and may be privileged. If you are
not the intended recipient, please destroy this message, delete
any copies held on your systems and notify the sender immediately.
You should not retain, copy or use this e-mail for any purpose,
nor disclose all or any part of its content to any other person.
All messages passing through this gateway are checked for viruses
but we strongly recommend that you check for viruses using your
own virus scanner as North Glasgow University Hospitals NHS Trust
will not take responsibility for any damage caused as a result of
virus infection.

I have had the same problem, I also inserted heavier bolts. Both machines had R-Arms installed.
The main cause was the gantry was not balanced, so to compensate the clutches were tightened too tight. Once I rebalanced the gantry and set the clutch properly I have had no problems.

Just a thought,
Chris Bartee
1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 24 19:26:38 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xWec-0005oS-00; Mon, 24 Mar 2003 19:26:38 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 6659C1112FD; Mon, 24 Mar 2003 19:24:35 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id LAA03075 for linac-eng-list; Mon, 24 Mar 2003 11:47:45 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mailcity.com (www3.mail.lycos.com [209.202.220.160]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id LAA03068 for ; Mon, 24 Mar 2003 11:47:43 -0600 (CST) Received: from Unknown/Local ([?.?.?.?]) by mailcity.com; Mon, 24 Mar 2003 17:47:01 -0000 To: "'linac-eng@plato.aristotle.net'" , "Inglis, John" Date: Mon, 24 Mar 2003 12:47:01 -0500 From: "david hall" Message-ID: Mime-Version: 1.0 X-Sent-Mail: off Reply-To: hall.david@lycos.com X-Mailer: MailCity Service X-Priority: 3 Subject: Re: gantry drive assembly on 600C X-Sender-Ip: 67.28.80.162 Organization: Lycos Mail (http://www.mail.lycos.com:80) Content-Type: text/plain; charset=us-ascii Content-Language: en Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f To: "'linac-eng@plato.aristotle.net'" , "Inglis, John" Date: Mon, 24 Mar 2003 12:47:01 -0500 From: "david hall" X-Sent-Mail: off Reply-To: hall.david@lycos.com X-Priority: 3 Subject: Re: gantry drive assembly on 600C X-Sender-Ip: 67.28.80.162 Organization: Lycos Mail (http://www.mail.lycos.com:80) Content-Language: en Sender: owner-linac-eng@plato.aristotle.net John, Yes, I've seen this. Usually it is because the chain is too tight. The slack in the chain is NOT symmetrical through the full range of gantry rotation, i.e. if it is perfect at one gantry angle, it can be way too tight 90 degrees from that point. Dave Hall -- On Mon, 24 Mar 2003 15:35:51 Inglis, John wrote: >Information for anyone who services Varian 600c linacs. We have recently >experienced a complete failure of the gantry drive gearbox mounting bracket >assembly. This was a result of the bolts, used to attach the bracket to the >main linac stand frame, shearing. All, but one, of the bolts sheared >allowing the bracket to split at the last remaining bolt hole. The only >thing stopping the gantry from free moving was the drive chain jamming up in >the system. (Damage was also inflicted on the gantry rotation readout >assembly). >The bolts holding the gearbox bracket have, on at least two other occasions, >sheared on the same linac. Another 600c, about the same age ( 6-7 years) had >on one occasion at least one bolt damaged. >Newer Linacs appear to have heavier bolts fitted, so we modified the fitting >to take larger diameter bolts in the hope this will stop the failure. >Has anyone experienced a similar problem? > >John Inglis >MTO 4*** >Glasgow > >_________________________________________________________________ >The information contained within this e-mail and in any >attachments is confidential and may be privileged. If you are >not the intended recipient, please destroy this message, delete >any copies held on your systems and notify the sender immediately. >You should not retain, copy or use this e-mail for any purpose, >nor disclose all or any part of its content to any other person. >All messages passing through this gateway are checked for viruses >but we strongly recommend that you check for viruses using your >own virus scanner as North Glasgow University Hospitals NHS Trust >will not take responsibility for any damage caused as a result of >virus infection. > _____________________________________________________________ Get 25MB, POP3, Spam Filtering with LYCOS MAIL PLUS for $19.95/year. http://login.mail.lycos.com/brandPage.shtml?pageId=plus&ref=lmtplus 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 24 22:50:04 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xZpU-00069m-00; Mon, 24 Mar 2003 22:50:04 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 3992F1112F4; Mon, 24 Mar 2003 22:47:59 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id PAA07298 for linac-eng-list; Mon, 24 Mar 2003 15:22:59 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA07294 for ; Mon, 24 Mar 2003 15:22:56 -0600 (CST) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h2OLMcov019327 for ; Tue, 25 Mar 2003 09:22:38 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Tue, 25 Mar 2003 10:17:22 -0600 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Tue, 25 Mar 2003 09:22:18 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Tue, 25 Mar 2003 09:21:57 +1200 From: "Dave Pinchin" To: , Subject: Re: gantry drive assembly on 600C Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 25 Mar 2003 09:21:57 +1200 From: "Dave Pinchin" To: , Subject: Re: gantry drive assembly on 600C Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day John, We have a 600C #268 and had a similar occurance, One bolt sheared and three were loose. The RTs complained about the gantry being all "Wibble-Wobbly and noisy on rotate" We thought ours was an isolated incident. It's a worry when the unit can be severely out of balance by virtue of the PV arm or tray blocks. Have you notified Varian Factory of the failure and how serious the failure mode could have been? They may have already addressed this issue but I feel it deserves a "mandatory safety" CTB. When you notify Varian make sure that the message gets through to the factory and doesn't get lost at the local level. I have always found V responsive to genuine safety concerns. But they have never been speedy in their response. I guess they just want to do everything thoroughly. Dave. >>> "Inglis, John" 25/03/03 03:35:51 >>> Information for anyone who services Varian 600c linacs. We have recently experienced a complete failure of the gantry drive gearbox mounting bracket assembly. This was a result of the bolts, used to attach the bracket to the main linac stand frame, shearing. All, but one, of the bolts sheared allowing the bracket to split at the last remaining bolt hole. The only thing stopping the gantry from free moving was the drive chain jamming up in the system. (Damage was also inflicted on the gantry rotation readout assembly). The bolts holding the gearbox bracket have, on at least two other occasions, sheared on the same linac. Another 600c, about the same age ( 6-7 years) had on one occasion at least one bolt damaged. Newer Linacs appear to have heavier bolts fitted, so we modified the fitting to take larger diameter bolts in the hope this will stop the failure. Has anyone experienced a similar problem? John Inglis MTO 4*** Glasgow _________________________________________________________________ The information contained within this e-mail and in any attachments is confidential and may be privileged. If you are not the intended recipient, please destroy this message, delete any copies held on your systems and notify the sender immediately. You should not retain, copy or use this e-mail for any purpose, nor disclose all or any part of its content to any other person. All messages passing through this gateway are checked for viruses but we strongly recommend that you check for viruses using your own virus scanner as North Glasgow University Hospitals NHS Trust will not take responsibility for any damage caused as a result of virus infection. ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 24 22:57:12 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xZwO-0006AV-00; Mon, 24 Mar 2003 22:57:12 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0BE5F1112F4; Mon, 24 Mar 2003 22:55:08 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id PAA07503 for linac-eng-list; Mon, 24 Mar 2003 15:37:34 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from web40711.mail.yahoo.com (web40711.mail.yahoo.com [66.218.78.168]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id PAA07499 for ; Mon, 24 Mar 2003 15:37:32 -0600 (CST) Message-ID: <20030324213701.53218.qmail@web40711.mail.yahoo.com> Received: from [203.109.249.134] by web40711.mail.yahoo.com via HTTP; Mon, 24 Mar 2003 21:37:01 GMT Date: Mon, 24 Mar 2003 21:37:01 +0000 (GMT) From: =?iso-8859-1?q?pankaj=20roy?= Subject: Caution:Maggie cable arc To: GARRYANGEL@aol.com, linac-eng@plato.aristotle.net In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 24 Mar 2003 21:37:01 +0000 (GMT) From: =?iso-8859-1?q?pankaj=20roy?= Subject: Caution:Maggie cable arc To: GARRYANGEL@aol.com, linac-eng@plato.aristotle.net In-Reply-To: Sender: owner-linac-eng@plato.aristotle.net Hi Everybody, This problem of the maggie HV arcing with the covers is a bit frustrating and seemingly inexplicable to start with. I have experienced the same problem with a SIEMENS Mevatron ( Digital) as well. This happened after we put the new modification of cooling fans. This is interesting (I don't know if it applies to VARIAN machines) :--- The HV supply to the Magnetron has a Coaxial cable with two wires ( one of them is the outer "shield"). -------BOTH are at High Voltage. They are NOT shielded. The voltage difference between them is just the filament voltage. So the entire length of the cable running from the Pulse Tank to the Maggie is at High Voltage. This cable is often very close to the covers and so arcs to the covers. Those of you servicing SIEMENS Mevatrons may watchout. (Moral of the story--- Do not assume all shields to be grounded. Refer the stupid ckt diagram) Regards, Pankaj Roy > >>> 23/03/03 04:29:52 >>> > Hi Everyone ... > > Well, I thought I had seen everyting over the years, > however, I just > saew > something new.Replaced a Magnetron on a Cl-6/100, > aligning AFC, etc > ...Everthhing looked very acceptable. Re-installed > the "Gantry cage" > and > checkiung operation one last time. Fortunately, the > scope had not been > > disconnected and I noticed that there was > significant Magnetron current > pulse > degradation on the "leading" portion of the pulse > top. I was a > "Classic" high > voltage corona issue. Removing the metal shield on > the Magnetron side > of the > cage alleviated the problem. At a loss to explain > why this would occur > with a > replacement maggie. > > Has anyone else out there seen this effect? > > Garry > > > ********************************************************************** > ** This email and attachments have been scanned for > content and viruses > and is believed to be clean ** > > This email or attachments may contain confidential > or legally > privileged information intended for the sole use of > the addressee(s). > Any use, redistribution, disclosure, or reproduction > of this message, > except as intended, is prohibited. If you received > this email in error, > please notify the sender and remove all copies of > the message, > including any attachments. Any views or opinions > expressed in this > email (unless otherwise stated) may not represent > those of Canterbury > District Health Board > ********************************************************************** > __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Mar 25 16:43:53 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18xqaf-0004gp-00; Tue, 25 Mar 2003 16:43:53 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B0BB71112F5; Tue, 25 Mar 2003 16:41:44 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id JAA23943 for linac-eng-list; Tue, 25 Mar 2003 09:03:46 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail3.nhs.uk (mail3.nhs.uk [194.72.23.240]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA23937 for ; Tue, 25 Mar 2003 09:03:41 -0600 (CST) Received: from hn-ext by mail3.nhs.uk (Sendmail 8.8.8) with esmtp id 18xpxh-0001D4-00; Tue, 25 Mar 2003 15:03:37 +0000 Received: from relay.nhs.uk (194.62.42.143) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B60049BEE0 for linac-eng@plato.aristotle.net; Tue, 25 Mar 2003 15:03:36 +0000 Received: from smtp.koc.mtw-tr.nhs.uk (212.196.163.36) by relay.nhs.uk (Syntegra-3 7.0.008) id 3E8015D700031F51; Tue, 25 Mar 2003 15:03:36 +0000 Received: from ns2.onc.koc.mtw-tr.nhs.uk (pat.koc.mtw-tr.nhs.uk [192.168.1.253]) by smtp.koc.mtw-tr.nhs.uk (8.11.6/8.11.6) with ESMTP id h2PF3uv08950; Tue, 25 Mar 2003 15:03:56 GMT Received: from ws135 (ws135.onc.koc.mtw-tr.nhs.uk [192.168.2.163]) by ns2.onc.koc.mtw-tr.nhs.uk (8.11.6/8.11.6) with SMTP id h2PEu9U01410; Tue, 25 Mar 2003 14:56:09 GMT From: "David Fenn" To: "'Inglis, John'" , Subject: RE: gantry drive assembly on 600C Date: Tue, 25 Mar 2003 15:03:25 -0000 Message-ID: <000601c2f2df$afc2c040$a302a8c0@onc.koc.mtwtr.nhs.uk> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C2F2DF.AFE45200" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 In-Reply-To: <5D4FCC9BE31DD511B96600508BB9D2CF1B5518@NORTHNET-09> Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "David Fenn" To: "'Inglis, John'" , Subject: RE: gantry drive assembly on 600C Date: Tue, 25 Mar 2003 15:03:25 -0000 X-Priority: 3 (Normal) X-MSMail-Priority: Normal Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 In-Reply-To: <5D4FCC9BE31DD511B96600508BB9D2CF1B5518@NORTHNET-09> Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C2F2DF.AFE45200 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit gantry drive assembly on 600CHi John! Yes we have had the same problem here, but not as catstrophic as you! We have to have the drive chains on both our 600C's really tight to prevent gantry rocking when using assisted set up. If the chain is at all slack, the gantry rocks back and forth and takes several seconds to stabilise at the angle being asked for. Also we know the main drive cog on each machine is not concentric with the gantry rotational bearing, so the chain gets really tight at a couple of angles. All this puts a lot of strain on those small bolts! We decided against upping the bolt rating because the failure will only occur at the next weakest link! Instead we have put a check on those bolts in our monthly service schedule. Also, because they are not HT steel bolts and only a 1/4, they are very easy to overtighten and stretch, thereby weakening them. David Fenn Kent Oncology Centre Maidstone UK -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Inglis, John Sent: 24 March 2003 15:36 To: 'linac-eng@plato.aristotle.net' Subject: gantry drive assembly on 600C Information for anyone who services Varian 600c linacs. We have recently experienced a complete failure of the gantry drive gearbox mounting bracket assembly. This was a result of the bolts, used to attach the bracket to the main linac stand frame, shearing. All, but one, of the bolts sheared allowing the bracket to split at the last remaining bolt hole. The only thing stopping the gantry from free moving was the drive chain jamming up in the system. (Damage was also inflicted on the gantry rotation readout assembly). The bolts holding the gearbox bracket have, on at least two other occasions, sheared on the same linac. Another 600c, about the same age ( 6-7 years) had on one occasion at least one bolt damaged. Newer Linacs appear to have heavier bolts fitted, so we modified the fitting to take larger diameter bolts in the hope this will stop the failure. Has anyone experienced a similar problem? John Inglis MTO 4*** Glasgow _________________________________________________________________ The information contained within this e-mail and in any attachments is confidential and may be privileged. If you are not the intended recipient, please destroy this message, delete any copies held on your systems and notify the sender immediately. You should not retain, copy or use this e-mail for any purpose, nor disclose all or any part of its content to any other person. All messages passing through this gateway are checked for viruses but we strongly recommend that you check for viruses using your own virus scanner as North Glasgow University Hospitals NHS Trust will not take responsibility for any damage caused as a result of virus infection. ------=_NextPart_000_0007_01C2F2DF.AFE45200 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable gantry drive assembly on 600C

Hi=20 John!

Yes we=20 have had the same problem here, but not as catstrophic as=20 you!

We=20 have to have the drive chains on both our 600C's really tight to = prevent=20 gantry rocking when using assisted set up. If the chain is at all slack, = the=20 gantry rocks back and forth and takes several seconds to stabilise at = the angle=20 being asked for. Also we know the main drive cog on each machine is = not=20 concentric with the gantry rotational bearing, so the chain gets really = tight at=20 a couple of angles. All this puts a lot of strain on those small=20 bolts!

We=20 decided against upping the bolt rating because the failure will only = occur at=20 the next weakest link! Instead we have put a check on those bolts in our = monthly=20 service schedule.

Also,=20 because they are not HT steel bolts and only a 1/4, they are very easy = to=20 overtighten and stretch, thereby weakening them.

David=20 Fenn

Kent=20 Oncology Centre

Maidstone

-----Original Message-----
From:=20 owner-linac-eng@plato.aristotle.net=20 [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of = Inglis,=20 John
Sent: 24 March 2003 15:36
To:=20 'linac-eng@plato.aristotle.net'
Subject: gantry drive = assembly on=20 600C

Information for anyone who services = Varian 600c=20 linacs. We have recently experienced a complete failure of the gantry = drive=20 gearbox mounting bracket assembly. This was a result of the bolts, = used to=20 attach the bracket to the main linac stand frame, shearing. All, but = one, of=20 the bolts sheared allowing the bracket to split at the last remaining = bolt=20 hole. The only thing stopping the gantry from free moving was the = drive chain=20 jamming up in the system. (Damage was also inflicted on the gantry = rotation=20 readout assembly).

The bolts holding the gearbox bracket = have, on at=20 least two other occasions, sheared on the same linac. Another 600c, = about the=20 same age ( 6-7 years) had on one occasion at least one bolt=20 damaged.

Newer Linacs appear to have heavier = bolts fitted,=20 so we modified the fitting to take larger diameter bolts in the hope = this will=20 stop the failure.

Has anyone experienced a similar = problem?=20

John Inglis
MTO=20 4***
Glasgow

________________________________________________________________= _=20
The information contained = within this=20 e-mail and in any
attachments = is=20 confidential and may be privileged. If you are
not the intended recipient, please destroy this = message,=20 delete
any copies held on your = systems and=20 notify the sender immediately.
You should=20 not retain, copy or use this e-mail for any purpose,
nor disclose all or any part of its content to = any other=20 person.
All messages passing = through this=20 gateway are checked for viruses
but we=20 strongly recommend that you check for viruses using your =
own virus scanner as North Glasgow University = Hospitals NHS=20 Trust
will not take = responsibility for any=20 damage caused as a result of
virus=20 infection.

------=_NextPart_000_0007_01C2F2DF.AFE45200-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 09:24:47 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18y6DG-0007Ag-00; Wed, 26 Mar 2003 09:24:46 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 7EB7F111316; Wed, 26 Mar 2003 09:21:58 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id BAA10009 for linac-eng-list; Wed, 26 Mar 2003 01:50:56 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from sccimhc01.insightbb.com (sccimhc01.insightbb.com [63.240.76.163]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id BAA10005 for ; Wed, 26 Mar 2003 01:50:54 -0600 (CST) Received: from pavilion (12-220-97-100.client.insightbb.com[12.220.97.100]) by sccimhc01.insightbb.com (sccimhc01) with SMTP id <20030326075023im1003127se> (Authid: jrarnold@insightbb.com); Wed, 26 Mar 2003 07:50:23 +0000 Message-ID: <000c01c2f343$38a522a0$6461dc0c@insightbb.com> From: "Joel Arnold" To: Subject: Collimator rotation when full-field is selected ! Date: Wed, 26 Mar 2003 02:55:54 -0000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01C2F343.37E4DFE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Joel Arnold" To: Subject: Collimator rotation when full-field is selected ! Date: Wed, 26 Mar 2003 02:55:54 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0009_01C2F343.37E4DFE0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Varian 6/100 s/n473 When full-field is selected for port films the collimator rotates slowly = CCW as the blades open. The collimator and gantry angles seem to have = no bearing to problem. Removing hand pendent or moving the mode switch = to couch stops the rotation. Back-up hand pendent works the same. I = was checking the boards in the Aux. Electronics rack and noticed it is = very warm to the touch near the field power resistors. The resistors = are 25 watts and use the frame as the heat sink. I don't remember how = warm they got in the past, but I am checking my other 6/100 to day. I = plan to scope drive signals in and out of aux. electronics and check = power next. =20 This is so strange it's got to be something simple I'm missing. Thanks = for your help. Joel Arnold jrarnold@health-partners.org Mercy Health Partners Cincinnati, Ohio ------=_NextPart_000_0009_01C2F343.37E4DFE0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

Varian 6/100 s/n473

When full-field is selected for port = films the=20 collimator rotates slowly CCW as the blades open. The collimator = and=20 gantry angles seem to have no bearing to problem. Removing hand = pendent or=20 moving the mode switch to couch stops the rotation. Back-up hand = pendent=20 works the same. I was checking the boards in the Aux. = Electronics=20 rack and noticed it is very warm to the touch near the field power=20 resistors. The resistors are 25 watts and use the frame as = the heat=20 sink. I don't remember how warm they got in the past, but I am = checking my=20 other 6/100 to day. I plan to = scope drive=20 signals in and out of aux. electronics and check power next. =

This is so strange it's got to be = something simple=20 I'm missing. Thanks for your help.

Joel Arnold

jrarnold@health-partners.org=

Mercy Health Partners

Cincinnati, Ohio

------=_NextPart_000_0009_01C2F343.37E4DFE0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 14:38:13 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yB6b-0003EO-00; Wed, 26 Mar 2003 14:38:13 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 838121112F7; Wed, 26 Mar 2003 14:36:01 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA13994 for linac-eng-list; Wed, 26 Mar 2003 07:12:55 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICO2.Partners.org (phsexchico2.partners.org [170.223.254.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA13990 for ; Wed, 26 Mar 2003 07:12:53 -0600 (CST) Received: by phsexchico2.partners.org with Internet Mail Service (5.5.2655.55) id ; Wed, 26 Mar 2003 08:12:22 -0500 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F13E@phsexch6.partners.org> From: "Maddox, Buford J" To: "'Joel Arnold'" , linac-eng@plato.aristotle.net Subject: RE: Collimator rotation when full-field is selected ! Date: Wed, 26 Mar 2003 08:12:19 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F399.54D7051E" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'Joel Arnold'" , linac-eng@plato.aristotle.net Subject: RE: Collimator rotation when full-field is selected ! Date: Wed, 26 Mar 2003 08:12:19 -0500 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2F399.54D7051E Content-Type: text/plain; charset="windows-1252" Sounds like an offset somewhere. Try another pcb? If the 15v ps's are not matched, you could get this effect, center of pot on pendant would not be zero V. BTW, the extra ground on the pot is to prevent the center from going to 15v if one of the 15v supplies is not there. If that ground is not present, and one supply is missing, all motions will take off at full speed when the enable is pressed, as the old 4-80s used to do. We check the ground all the way to the stand on PMI's, and check it on the pendant each time the pendant is repaired. Jerry -----Original Message----- From: Joel Arnold [mailto:jrarnold@insightbb.com] Sent: Tuesday, March 25, 2003 9:56 PM To: linac-eng@plato.aristotle.net Subject: Collimator rotation when full-field is selected ! Varian 6/100 s/n473 When full-field is selected for port films the collimator rotates slowly CCW as the blades open. The collimator and gantry angles seem to have no bearing to problem. Removing hand pendent or moving the mode switch to couch stops the rotation. Back-up hand pendent works the same. I was checking the boards in the Aux. Electronics rack and noticed it is very warm to the touch near the field power resistors. The resistors are 25 watts and use the frame as the heat sink. I don't remember how warm they got in the past, but I am checking my other 6/100 to day. I plan to scope drive signals in and out of aux. electronics and check power next. This is so strange it's got to be something simple I'm missing. Thanks for your help. Joel Arnold jrarnold@health-partners.org Mercy Health Partners Cincinnati, Ohio ------_=_NextPart_001_01C2F399.54D7051E Content-Type: text/html; charset="windows-1252"

Sounds like an offset somewhere. Try another pcb?

If the 15v ps's are not matched, you could get this effect, center of pot on pendant would not be zero V. BTW, the extra ground on the pot is to prevent the center from going to 15v if one of the 15v supplies is not there. If that ground is not present, and one supply is missing, all motions will take off at full speed when the enable is pressed, as the old 4-80s used to do. We check the ground all the way to the stand on PMI's, and check it on the pendant each time the pendant is repaired.

Jerry

-----Original Message-----
From: Joel Arnold [mailto:jrarnold@insightbb.com]
Sent: Tuesday, March 25, 2003 9:56 PM
To: linac-eng@plato.aristotle.net
Subject: Collimator rotation when full-field is selected !

Varian 6/100 s/n473

When full-field is selected for port films the collimator rotates slowly CCW as the blades open. The collimator and gantry angles seem to have no bearing to problem. Removing hand pendent or moving the mode switch to couch stops the rotation. Back-up hand pendent works the same. I was checking the boards in the Aux. Electronics rack and noticed it is very warm to the touch near the field power resistors. The resistors are 25 watts and use the frame as the heat sink. I don't remember how warm they got in the past, but I am checking my other 6/100 to day. I plan to scope drive signals in and out of aux. electronics and check power next.

This is so strange it's got to be something simple I'm missing. Thanks for your help.

Joel Arnold

jrarnold@health-partners.org

Mercy Health Partners

Cincinnati, Ohio

------_=_NextPart_001_01C2F399.54D7051E-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 14:55:50 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yBNd-0003du-00; Wed, 26 Mar 2003 14:55:49 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2246C1112F7; Wed, 26 Mar 2003 14:53:38 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA14216 for linac-eng-list; Wed, 26 Mar 2003 07:28:20 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICO2.Partners.org (phsexchico2.partners.org [170.223.254.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA14212 for ; Wed, 26 Mar 2003 07:28:18 -0600 (CST) Received: by phsexchico2.partners.org with Internet Mail Service (5.5.2655.55) id ; Wed, 26 Mar 2003 08:27:48 -0500 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F140@phsexch6.partners.org> From: "Maddox, Buford J" To: "'Sui_Keung.Chan@alumni.cityu.edu.hk'" , linac eng Subject: RE: Blown clipper diodes Date: Wed, 26 Mar 2003 08:27:47 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'Sui_Keung.Chan@alumni.cityu.edu.hk'" , linac eng Subject: RE: Blown clipper diodes Date: Wed, 26 Mar 2003 08:27:47 -0500 Sender: owner-linac-eng@plato.aristotle.net I was wondering what was found to be the cause of this problem? Clipper diodes protect against mismatch due to failure/arcing in pulse cables, pulse xformer, kly, Rf guide parts. Any symptoms on scope? Is the clipper signal normal? This is a tough area to troubleshoot. Can you hipot the cables? Arcing in the guide sounds like someone hammering on the guide with a small hammer. Hope this gives you some ideas, and some other folks come up with some of their experiences. Good topic. Jerry -----Original Message----- From: Jonathan Chan [mailto:Sui_Keung.Chan@alumni.cityu.edu.hk] Sent: Friday, March 21, 2003 3:25 AM To: linac eng Subject: Re: Blown clipper diodes Damain, Checked if there is any HV arcing. The MOD fault detection may have failed, thus preventing the MOD fault to terminate the beam before the arc current distroy you end-clipper diodes and MOVs. Good Luck, Jonathan Chan QUEEN MARY HOSPITAL HONG KONG Causby Damian wrote: > Hi all > I am having problems with the clipper diodes blowing on our 2100 C2 > linac Also having a problem warming up some mornings 6e or 9e have low or > no dose rate, Mostly only happens when Im not there, > The last set of clipper diodes only lasted 48 hours and took out the MOVs as > well. > Machine is runner perfectly at present. > > Damian Causby > Engineering Operations Manager > W.P. Holman Clinic > Launceston General Hospital > TAS, AUSTRALIA > ph 03 6348 7151 > fax 03 6361 6371 > > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 15:31:25 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yBw5-0004IB-00; Wed, 26 Mar 2003 15:31:25 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 536281112F1; Wed, 26 Mar 2003 15:29:14 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA14375 for linac-eng-list; Wed, 26 Mar 2003 07:34:58 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsmq05.netvigator.com (imsmq05.netvigator.com [218.102.48.41]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA14371 for ; Wed, 26 Mar 2003 07:34:56 -0600 (CST) Received: (qmail 1607 invoked from network); 26 Mar 2003 13:34:40 -0000 Received: from n218103170024.netvigator.com (HELO kyeung) (218.103.170.24) by imsmq05.netvigator.com with SMTP; 26 Mar 2003 13:34:40 -0000 Message-ID: <002001c2f39c$72840e60$27adfea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: Beam on control & HWFA Date: Wed, 26 Mar 2003 21:34:37 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01C2F3DF.8085BCA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: Beam on control & HWFA Date: Wed, 26 Mar 2003 21:34:37 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_001D_01C2F3DF.8085BCA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear Colleagues, Varian C3 Clinac, Version 6 The beam-on button on the d-kb is used to initiate the making of power = contacts, K1, It goes directly to the timer interface pcb....=20 Could anyone advise the followings:- How does the computer know when to issue a "beam-on" command? Does the = computer know through the auxiliary contact of the power contactor?=20 How does the computer issue the HWFA interlock? Thanks in advance. Kim Yeung ------=_NextPart_000_001D_01C2F3DF.8085BCA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Dear Colleagues,

Varian C3 Clinac, = Version=20 6

The beam-on button on the d-kb is used = to initiate=20 the making of power contacts, K1, It goes directly to the timer = interface=20 pcb....

Could anyone advise the = followings:-

How = does the=20 computer know when to issue a "beam-on" command? Does the computer know through the auxiliary contact = of the=20 power contactor?

How does the computer issue the HWFA=20 interlock?

Thanks in advance.

Kim Yeung

------=_NextPart_000_001D_01C2F3DF.8085BCA0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 15:38:29 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yC2v-0004R8-00; Wed, 26 Mar 2003 15:38:29 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 3C5B01112F1; Wed, 26 Mar 2003 15:36:18 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id IAA14967 for linac-eng-list; Wed, 26 Mar 2003 08:00:07 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mopsy.musc.edu (mopsy.musc.edu [128.23.203.176]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA14953 for ; Wed, 26 Mar 2003 07:59:46 -0600 (CST) Received: from revere3.musc.edu (revere3.musc.edu [128.23.203.10]) by mopsy.musc.edu (8.12.8/8.12.8) with ESMTP id h2QDx7iM021589 for ; Wed, 26 Mar 2003 08:59:07 -0500 Received: from XCHANGE2k.radonc2k.musc.edu (xchange2k.RadOnc.MUSC.EDU [128.23.55.250]) by revere3.musc.edu (8.8.8/8.8.8) with ESMTP id IAA07832 for ; Wed, 26 Mar 2003 08:59:07 -0500 (EST) Content-Class: urn:content-classes:message Subject: RE: Collimator rotation when full-field is selected ! MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F39F.DDD821D9" Date: Wed, 26 Mar 2003 08:59:06 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.0.6249.0 Message-ID: Thread-Topic: Collimator rotation when full-field is selected ! Thread-Index: AcLzb5cdm/n0MvvaT56/fxocPA6N2wAL4EIg From: "Nelson, Steve" To: "Joel Arnold" , Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Content-Class: urn:content-classes:message Subject: RE: Collimator rotation when full-field is selected ! Date: Wed, 26 Mar 2003 08:59:06 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.0.6249.0 Thread-Topic: Collimator rotation when full-field is selected ! Thread-Index: AcLzb5cdm/n0MvvaT56/fxocPA6N2wAL4EIg From: "Nelson, Steve" To: "Joel Arnold" , Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------_=_NextPart_001_01C2F39F.DDD821D9 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Joel, I had the same problem on sn 426 (now retired) for about a week. It was intermittent and I never solved the problem. It went away after a short while never to return. Good hunting. =20 -----Original Message----- From: Joel Arnold [mailto:jrarnold@insightbb.com]=20 Sent: Tuesday, March 25, 2003 9:56 PM To: linac-eng@plato.aristotle.net Subject: Collimator rotation when full-field is selected ! =20 Varian 6/100 s/n473 When full-field is selected for port films the collimator rotates slowly CCW as the blades open. The collimator and gantry angles seem to have no bearing to problem. Removing hand pendent or moving the mode switch to couch stops the rotation. Back-up hand pendent works the same. I was checking the boards in the Aux. Electronics rack and noticed it is very warm to the touch near the field power resistors. The resistors are 25 watts and use the frame as the heat sink. I don't remember how warm they got in the past, but I am checking my other 6/100 to day. I plan to scope drive signals in and out of aux. electronics and check power next. =20 This is so strange it's got to be something simple I'm missing. Thanks for your help. =20 Joel Arnold jrarnold@health-partners.org Mercy Health Partners Cincinnati, Ohio =20 =20 =20 ------_=_NextPart_001_01C2F39F.DDD821D9 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Joel,

= I had the same problem on sn 426 (now retired) for about a week. It = was intermittent and I never solved the problem. It went away after a short while never = to return. Good hunting.

-----Original = Message-----
From: Joel Arnold [mailto:jrarnold@insightbb.com]
Sent: Tuesday, March 25, = 2003 9:56 PM
To: = linac-eng@plato.aristotle.net
Subject: Collimator = rotation when full-field is selected !

Varian 6/100 = s/n473

When full-field is selected = for port films the collimator rotates slowly CCW as the blades open. The collimator and gantry angles seem to have no bearing to problem. = Removing hand pendent or moving the mode switch to couch stops the = rotation. Back-up hand pendent works the same. I was checking the boards in the Aux. Electronics rack and noticed it is very warm to the touch = near the field power resistors. The resistors are 25 watts and use = the frame as the heat sink. I don't remember how warm they got in the = past, but I am checking my other 6/100 to day. I plan to scope drive = signals in and out of aux. electronics and check power next. =

This is so strange it's got = to be something simple I'm missing. Thanks for your = help.

Joel = Arnold

jrarnold@health-partners.org=

Mercy Health = Partners

Cincinnati, = Ohio

=00 ------_=_NextPart_001_01C2F39F.DDD821D9-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 16:27:55 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yCol-00050D-00; Wed, 26 Mar 2003 16:27:55 +0100 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 97E841112F1 for ; Wed, 26 Mar 2003 16:25:45 +0100 (MET) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KTZJ4CT7G08XWUVP@med.uu.nl> for kok@radth.med.uu.nl; Wed, 26 Mar 2003 16:23:52 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KTZJ47OMHU8WXH0R@med.uu.nl> for kok@radth.med.uu.nl; Wed, 26 Mar 2003 16:23:43 +0100 Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA14216 for linac-eng-list; Wed, 26 Mar 2003 07:28:20 -0600 (CST) Received: from PHSEXCHICO2.Partners.org (phsexchico2.partners.org [170.223.254.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA14212 for ; Wed, 26 Mar 2003 07:28:18 -0600 (CST) Received: by phsexchico2.partners.org with Internet Mail Service (5.5.2655.55) id ; Wed, 26 Mar 2003 08:27:48 -0500 Date: Wed, 26 Mar 2003 08:27:47 -0500 From: "Maddox, Buford J" Subject: RE: Blown clipper diodes Sender: owner-linac-eng@plato.aristotle.net To: "'Sui_Keung.Chan@alumni.cityu.edu.hk'" , linac eng Message-id: <36298D09ED1AD311B4DC0008C7F4D4E10A30F140@phsexch6.partners.org> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-type: text/plain; charset="iso-8859-1" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 26 Mar 2003 08:27:47 -0500 From: "Maddox, Buford J" Subject: RE: Blown clipper diodes Sender: owner-linac-eng@plato.aristotle.net To: "'Sui_Keung.Chan@alumni.cityu.edu.hk'" , linac eng X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f I was wondering what was found to be the cause of this problem? Clipper diodes protect against mismatch due to failure/arcing in pulse cables, pulse xformer, kly, Rf guide parts. Any symptoms on scope? Is the clipper signal normal? This is a tough area to troubleshoot. Can you hipot the cables? Arcing in the guide sounds like someone hammering on the guide with a small hammer. Hope this gives you some ideas, and some other folks come up with some of their experiences. Good topic. Jerry -----Original Message----- From: Jonathan Chan [mailto:Sui_Keung.Chan@alumni.cityu.edu.hk] Sent: Friday, March 21, 2003 3:25 AM To: linac eng Subject: Re: Blown clipper diodes Damain, Checked if there is any HV arcing. The MOD fault detection may have failed, thus preventing the MOD fault to terminate the beam before the arc current distroy you end-clipper diodes and MOVs. Good Luck, Jonathan Chan QUEEN MARY HOSPITAL HONG KONG Causby Damian wrote: > Hi all > I am having problems with the clipper diodes blowing on our 2100 C2 > linac Also having a problem warming up some mornings 6e or 9e have low or > no dose rate, Mostly only happens when Im not there, > The last set of clipper diodes only lasted 48 hours and took out the MOVs as > well. > Machine is runner perfectly at present. > > Damian Causby > Engineering Operations Manager > W.P. Holman Clinic > Launceston General Hospital > TAS, AUSTRALIA > ph 03 6348 7151 > fax 03 6361 6371 > > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 16:42:23 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yD2l-0005HQ-00; Wed, 26 Mar 2003 16:42:23 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B520A1112F1; Wed, 26 Mar 2003 16:40:12 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA17234 for linac-eng-list; Wed, 26 Mar 2003 09:07:13 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from persephone.med.yale.edu (email.med.yale.edu [130.132.232.16]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA17230 for ; Wed, 26 Mar 2003 09:07:12 -0600 (CST) Received: from yale.edu (vitalip.med.yale.edu [130.132.213.170]) by email.med.yale.edu (PMDF V6.1-1 #40995) with ESMTP id <0HCD0RJ9K3BY71@email.med.yale.edu> for linac-eng@plato.aristotle.net; Wed, 26 Mar 2003 10:07:11 -0500 (EST) Date: Wed, 26 Mar 2003 10:07:43 -0500 From: "Peter E. Vitali" Subject: Re: Collimator rotation when full-field is selected ! To: Joel Arnold Cc: linac-eng@plato.aristotle.net Message-id: <3E81C21D.9ABD65BB@yale.edu> MIME-version: 1.0 X-Mailer: Mozilla 4.75 (Macintosh; U; PPC) Content-type: text/plain; x-mac-creator=4D4F5353; x-mac-type=54455854; charset=us-ascii Content-transfer-encoding: 7bit X-Accept-Language: en,pdf References: <000c01c2f343$38a522a0$6461dc0c@insightbb.com> Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 26 Mar 2003 10:07:43 -0500 From: "Peter E. Vitali" Subject: Re: Collimator rotation when full-field is selected ! To: Joel Arnold Cc: linac-eng@plato.aristotle.net X-Accept-Language: en,pdf Sender: owner-linac-eng@plato.aristotle.net Joel: Questions: Is the rotation always in the same direction? Is it always the same speed? If it is then I would suspect that some amplifier is not zeroed out in the collimator motor drive circuit.. Check the output to the collimator motor for a small offset that would move the collimator. Then check the input ot the Amplifier. No change in the input, the problem has to be the Amplifier or the board the amplifier is on. Peter E. Vitali, CBET Therapeutic Radiological Engineer Yale New Haven Hospital 20 York Street, HRT 22 New Haven, CT. 06504 Phone: (203) 688-2948 FAX: (203) 688-3663 E-mail: peter.vitali@yale.edu As usual, everything I say may be plausibly denied at my employer's convenience... 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 16:58:12 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yDI4-0005YL-00; Wed, 26 Mar 2003 16:58:12 +0100 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 320401112F1 for ; Wed, 26 Mar 2003 16:56:03 +0100 (MET) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KTZK7AREHC8XXEE7@med.uu.nl> for kok@radth.med.uu.nl; Wed, 26 Mar 2003 16:54:26 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KTZK77A16Y8XQ0WS@med.uu.nl> for kok@radth.med.uu.nl; Wed, 26 Mar 2003 16:54:22 +0100 Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA14375 for linac-eng-list; Wed, 26 Mar 2003 07:34:58 -0600 (CST) Received: from imsmq05.netvigator.com (imsmq05.netvigator.com [218.102.48.41]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA14371 for ; Wed, 26 Mar 2003 07:34:56 -0600 (CST) Received: (qmail 1607 invoked from network); Wed, 26 Mar 2003 13:34:40 +0000 Received: from n218103170024.netvigator.com (HELO kyeung) (218.103.170.24) by imsmq05.netvigator.com with SMTP; Wed, 26 Mar 2003 13:34:40 +0000 Date: Wed, 26 Mar 2003 21:34:37 +0800 From: kim yeung Subject: Re: Beam on control & HWFA Sender: owner-linac-eng@plato.aristotle.net To: linac-eng Message-id: <002001c2f39c$72840e60$27adfea9@kyeung> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Mailer: Microsoft Outlook Express 6.00.2600.0000 Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_yqlGMAszs2mxaB6qWsALHg)" X-Priority: 3 X-MSMail-priority: Normal Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 26 Mar 2003 21:34:37 +0800 From: kim yeung Subject: Re: Beam on control & HWFA Sender: owner-linac-eng@plato.aristotle.net To: linac-eng X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Priority: 3 X-MSMail-priority: Normal X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This is a multi-part message in MIME format. --Boundary_(ID_yqlGMAszs2mxaB6qWsALHg) Content-type: text/plain; charset="iso-8859-1" Content-transfer-encoding: quoted-printable Dear Colleagues, Varian C3 Clinac, Version 6 The beam-on button on the d-kb is used to initiate the making of power = contacts, K1, It goes directly to the timer interface pcb....=20 Could anyone advise the followings:- How does the computer know when to issue a "beam-on" command? Does the = computer know through the auxiliary contact of the power contactor?=20 How does the computer issue the HWFA interlock? Thanks in advance. Kim Yeung --Boundary_(ID_yqlGMAszs2mxaB6qWsALHg) Content-type: text/html; charset="iso-8859-1" Content-transfer-encoding: quoted-printable

Dear Colleagues,

Varian C3 Clinac, = Version=20 6

The beam-on button on the d-kb is used = to initiate=20 the making of power contacts, K1, It goes directly to the timer = interface=20 pcb....

Could anyone advise the = followings:-

How = does the=20 computer know when to issue a "beam-on" command? Does the computer know through the auxiliary contact = of the=20 power contactor?

How does the computer issue the HWFA=20 interlock?

Thanks in advance.

Kim Yeung

--Boundary_(ID_yqlGMAszs2mxaB6qWsALHg)-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 17:00:09 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yDJx-0005Z5-00; Wed, 26 Mar 2003 17:00:09 +0100 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2EC211112F3 for ; Wed, 26 Mar 2003 16:58:00 +0100 (MET) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KTZK9FYYSG8XX4RA@med.uu.nl> for kok@radth.med.uu.nl; Wed, 26 Mar 2003 16:56:10 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KTZK9B9UQW8XQ0WS@med.uu.nl> for kok@radth.med.uu.nl; Wed, 26 Mar 2003 16:56:04 +0100 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id IAA14967 for linac-eng-list; Wed, 26 Mar 2003 08:00:07 -0600 (CST) Received: from mopsy.musc.edu (mopsy.musc.edu [128.23.203.176]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA14953 for ; Wed, 26 Mar 2003 07:59:46 -0600 (CST) Received: from revere3.musc.edu (revere3.musc.edu [128.23.203.10]) by mopsy.musc.edu (8.12.8/8.12.8) with ESMTP id h2QDx7iM021589 for ; Wed, 26 Mar 2003 08:59:07 -0500 Received: from XCHANGE2k.radonc2k.musc.edu (xchange2k.RadOnc.MUSC.EDU [128.23.55.250]) by revere3.musc.edu (8.8.8/8.8.8) with ESMTP id IAA07832 for ; Wed, 26 Mar 2003 08:59:07 -0500 (EST) Date: Wed, 26 Mar 2003 08:59:06 -0500 From: "Nelson, Steve" Subject: RE: Collimator rotation when full-field is selected ! Sender: owner-linac-eng@plato.aristotle.net To: Joel Arnold , linac-eng@plato.aristotle.net Message-id: MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft Exchange V6.0.6249.0 Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_PIh4PGVXwx2E7QDwM8M9qw)" Precedence: bulk Thread-Topic: Collimator rotation when full-field is selected ! Thread-Index: AcLzb5cdm/n0MvvaT56/fxocPA6N2wAL4EIg Content-Class: urn:content-classes:message X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 26 Mar 2003 08:59:06 -0500 From: "Nelson, Steve" Subject: RE: Collimator rotation when full-field is selected ! Sender: owner-linac-eng@plato.aristotle.net To: Joel Arnold , linac-eng@plato.aristotle.net X-MIMEOLE: Produced By Microsoft Exchange V6.0.6249.0 Thread-Topic: Collimator rotation when full-field is selected ! Thread-Index: AcLzb5cdm/n0MvvaT56/fxocPA6N2wAL4EIg Content-Class: urn:content-classes:message X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This is a multi-part message in MIME format. --Boundary_(ID_PIh4PGVXwx2E7QDwM8M9qw) Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: quoted-printable Joel, I had the same problem on sn 426 (now retired) for about a week. It was intermittent and I never solved the problem. It went away after a short while never to return. Good hunting. =20 -----Original Message----- From: Joel Arnold [mailto:jrarnold@insightbb.com]=20 Sent: Tuesday, March 25, 2003 9:56 PM To: linac-eng@plato.aristotle.net Subject: Collimator rotation when full-field is selected ! =20 Varian 6/100 s/n473 When full-field is selected for port films the collimator rotates slowly CCW as the blades open. The collimator and gantry angles seem to have no bearing to problem. Removing hand pendent or moving the mode switch to couch stops the rotation. Back-up hand pendent works the same. I was checking the boards in the Aux. Electronics rack and noticed it is very warm to the touch near the field power resistors. The resistors are 25 watts and use the frame as the heat sink. I don't remember how warm they got in the past, but I am checking my other 6/100 to day. I plan to scope drive signals in and out of aux. electronics and check power next. =20 This is so strange it's got to be something simple I'm missing. Thanks for your help. =20 Joel Arnold jrarnold@health-partners.org Mercy Health Partners Cincinnati, Ohio =20 =20 =20 --Boundary_(ID_PIh4PGVXwx2E7QDwM8M9qw) Content-type: text/html; charset="US-ASCII" Content-transfer-encoding: quoted-printable

Joel,

= I had the same problem on sn 426 (now retired) for about a week. It = was intermittent and I never solved the problem. It went away after a short while never = to return. Good hunting.

Varian 6/100 = s/n473

This is so strange it's got = to be something simple I'm missing. Thanks for your = help.

Joel = Arnold

jrarnold@health-partners.org=

Mercy Health = Partners

Cincinnati, = Ohio

=00 --Boundary_(ID_PIh4PGVXwx2E7QDwM8M9qw)-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-medical-physics-engineering@JISCMAIL.AC.UK Wed Mar 26 18:10:11 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yEPj-0005tM-00; Wed, 26 Mar 2003 18:10:11 +0100 Received: from smtp.jiscmail.ac.uk (smtp.jiscmail.ac.uk [130.246.192.48]) by caviar.isi.uu.nl (Postfix) with ESMTP id EE9AA1112F3 for ; Wed, 26 Mar 2003 18:07:58 +0100 (MET) Received: from LISTSERV.JISCMAIL.AC.UK (jiscmail.ac.uk) by smtp.jiscmail.ac.uk (LSMTP for Windows NT v1.1b) with SMTP id <6.00010D4C@smtp.jiscmail.ac.uk>; Wed, 26 Mar 2003 17:06:59 +0000 Received: from JISCMAIL.AC.UK by JISCMAIL.AC.UK (LISTSERV-TCP/IP release 1.8e) with spool id 20087161 for MEDICAL-PHYSICS-ENGINEERING@JISCMAIL.AC.UK; Wed, 26 Mar 2003 17:06:59 +0000 Received: from 130.246.192.52 by JISCMAIL.AC.UK (SMTPL release 1.0h) with TCP; Wed, 26 Mar 2003 17:06:59 GMT X-RAL-MFrom: X-RAL-Connect: Received: from mail1.nhs.uk (mail1.nhs.uk [213.120.235.81]) by ori.rl.ac.uk (8.11.1/8.11.1) with ESMTP id h2QH6wt11513 for ; Wed, 26 Mar 2003 17:06:58 GMT Received: from hn-ext by mail1.nhs.uk (Sendmail 8.8.8) with esmtp id 18yEMV-00050b-00; Wed, 26 Mar 2003 17:06:51 +0000 Received: from relay.nhs.uk (194.62.42.143) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B6004E6260 for MEDICAL-PHYSICS-ENGINEERING@JISCMAIL.AC.UK; Wed, 26 Mar 2003 17:06:51 +0000 Received: from bradfordhospitals.nhs.uk (194.189.212.50) by relay.nhs.uk (Syntegra-3 7.0.008) id 3E81C74A00010783 for MEDICAL-PHYSICS-ENGINEERING@JISCMAIL.AC.UK; Wed, 26 Mar 2003 17:06:55 +0000 Received: from BHT-MAIL-Message_Server by bradfordhospitals.nhs.uk with Novell_GroupWise; Wed, 26 Mar 2003 17:06:51 +0000 X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=_326D803B.07660C06" Message-ID: Date: Wed, 26 Mar 2003 17:06:25 +0000 Reply-To: A list to encourage discussion amongst academic Medical Physics in the UK Sender: A list to encourage discussion amongst academic Medical Physics in the UK From: Mike Avison Subject: Re: Help requested bruce protocol on cycle ergometer To: MEDICAL-PHYSICS-ENGINEERING@JISCMAIL.AC.UK Precedence: list *** EOOH *** X-RAL-MFrom: X-RAL-Connect: Date: Wed, 26 Mar 2003 17:06:25 +0000 Reply-To: A list to encourage discussion amongst academic Medical Physics in the UK Sender: A list to encourage discussion amongst academic Medical Physics in the UK From: Mike Avison Subject: Re: Help requested bruce protocol on cycle ergometer To: MEDICAL-PHYSICS-ENGINEERING@JISCMAIL.AC.UK This is a MIME message. If you are reading this text, you may want to consider changing to a mail reader or gateway that understands how to properly handle MIME multipart messages. --=_326D803B.07660C06 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi It might be helpful to report back messages and our findings It was suggested by Richard Underwood that we calculate it on a simple = mechanics basis. And this turned out to be not too far from the truth. We reckon the Veenstra cannot be programmed with 3 minute stages to = emulate the Bruce, however with 1 minute steps we get curves that have = broadly the same trend, when we set the starting power at 40 watt and the = steps at 20watt for a 90 kg patient. Adjust wattage in proportion to bogy = weight. Subscribers should not use this as a validated study, but might want to = use it as a starting point for their own estimate. Mike Avison Medical Physicist Bradford Royal Infirmary BD9 6RJ Phone 01274 364 135 Fax 01274 364 134 Mobile 0790 44 55 068 Mike.Avison@bradfordhospitals.nhs.uk and/or saltpiefarm@yahoo.co.uk --=_326D803B.07660C06 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Description: HTML

It might be helpful to report back messages and our=20 findings

It was suggested by Richard Underwood that we = calculate it on=20 a simple mechanics basis. And this turned out to be not too far from = the=20 truth.

We reckon the Veenstra cannot be programmed with 3 = minute=20 stages to emulate the Bruce, however with 1 minute steps we get curves = that have=20 broadly the same trend, when we set the starting power at 40 watt and the = steps=20 at 20watt for a 90 kg patient. Adjust wattage in proportion to=20 bogy weight.

Subscribers should not use this as a validated study, = but=20 might want to use it as a starting point for their own estimate.

Mike Avison
Medical Physicist
Bradford Royal=20 Infirmary
BD9 6RJ

Phone 01274 364 135
Fax = ; 01274=20 364 134
Mobile 0790 44 55 068

Mike.Avison@bradfordho= spitals.nhs.uk

and/or

saltpiefarm@yahoo.co.uk<= /DIV> --=_326D803B.07660C06-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 22:06:08 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yI64-0006CQ-00; Wed, 26 Mar 2003 22:06:08 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id D75FE1112F7; Wed, 26 Mar 2003 22:03:55 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA23609 for linac-eng-list; Wed, 26 Mar 2003 14:42:35 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA23605 for ; Wed, 26 Mar 2003 14:42:32 -0600 (CST) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h2QKgCov012790 for ; Thu, 27 Mar 2003 08:42:17 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Thu, 27 Mar 2003 09:36:47 -0600 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Thu, 27 Mar 2003 08:41:51 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Thu, 27 Mar 2003 08:41:48 +1200 From: "Dave Pinchin" To: , Subject: Re: Beam on control & HWFA Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 27 Mar 2003 08:41:48 +1200 From: "Dave Pinchin" To: , Subject: Re: Beam on control & HWFA Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day Kim, Just looking at 2100 CD #1164. (C3). The beam on button is scanned by DKB uP. This then sends data to the control processor via the comms proc. The control proc then issues the 'BEAM ON' command and monitors the fact that the beaming has commenced. If not (within 0.25 Sec I think) It shuts the thing down again via a HWFA and logs it appropriately. I think you may have spotted the processor's 'beam on' signal and assumed it was directly from the button. Dave. >>> "kim yeung" 27/03/03 01:34:37 >>> Dear Colleagues, Varian C3 Clinac, Version 6 The beam-on button on the d-kb is used to initiate the making of power contacts, K1, It goes directly to the timer interface pcb.... Could anyone advise the followings:- How does the computer know when to issue a "beam-on" command? Does the computer know through the auxiliary contact of the power contactor? How does the computer issue the HWFA interlock? Thanks in advance. Kim Yeung ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 22:06:52 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yI6m-0006Ca-00; Wed, 26 Mar 2003 22:06:52 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 96EE01112F3; Wed, 26 Mar 2003 22:04:39 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA23827 for linac-eng-list; Wed, 26 Mar 2003 14:46:49 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA23820 for ; Wed, 26 Mar 2003 14:46:46 -0600 (CST) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h2QKkYov013322 for ; Thu, 27 Mar 2003 08:46:34 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Thu, 27 Mar 2003 09:41:09 -0600 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Thu, 27 Mar 2003 08:46:13 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Thu, 27 Mar 2003 08:46:00 +1200 From: "Dave Pinchin" To: , Subject: Re: Beam on control & HWFA Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 27 Mar 2003 08:46:00 +1200 From: "Dave Pinchin" To: , Subject: Re: Beam on control & HWFA Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day again, Sorry, just posted and when the outgoing mail window closed I noticed that Version 6 was specified. I assume my explanation is still correct. But we have only version 5.4 here. Dave >>> "kim yeung" 27/03/03 01:34:37 >>> Dear Colleagues, Varian C3 Clinac, Version 6 The beam-on button on the d-kb is used to initiate the making of power contacts, K1, It goes directly to the timer interface pcb.... Could anyone advise the followings:- How does the computer know when to issue a "beam-on" command? Does the computer know through the auxiliary contact of the power contactor? How does the computer issue the HWFA interlock? Thanks in advance. Kim Yeung ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Mar 26 23:22:04 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yJHX-0006HO-00; Wed, 26 Mar 2003 23:22:04 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 96BA91112F4; Wed, 26 Mar 2003 23:19:51 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id PAA27526 for linac-eng-list; Wed, 26 Mar 2003 15:53:41 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from sigaba1.lancastergeneral.org (mail.lancastergeneral.org [170.122.250.15]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id PAA27522 for ; Wed, 26 Mar 2003 15:53:38 -0600 (CST) Received: from exchange.lha.org (192.168.2.53) by sigaba1.lancastergeneral.org (Sigaba Gateway v3.5) with SMTP; Wed, 26 Mar 2003 16:45:52 -0500 Received: FROM exchange.lha.org BY exchange.lha.org ; Wed Mar 26 16:53:05 2003 -0500 Received: by exchange.lancastergeneral.org with Internet Mail Service (5.5.2653.19) id ; Wed, 26 Mar 2003 16:53:04 -0500 Message-id: <3D998785DA22D611B68D00A0C9CDB0C00123B55A@mail.lha.org> From: "Bitler, Richard L" To: "'imagetalk@medicalparts.org'" Cc: "'linac-eng@plato.aristotle.net'" Subject: Digirad Nuc. Med. camera Date: Wed, 26 Mar 2003 16:53:03 -0500 MIME-Version: 1.0 X-mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Bitler, Richard L" To: "'imagetalk@medicalparts.org'" Cc: "'linac-eng@plato.aristotle.net'" Subject: Digirad Nuc. Med. camera Date: Wed, 26 Mar 2003 16:53:03 -0500 Sender: owner-linac-eng@plato.aristotle.net Hi All, I am interested in any information, opinions, etc. regarding Digirad nuclear medicine cameras. Especially information on detector reliability, image quality, and any service issues. Good or bad information would be appreciated. My hospital is considering a purchase. You may also reply to me personally at rlbitler@lancastergeneral.org Thanks. Rick Bitler Lead Rad. Equip. Spec. Lancaster General Hospital 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Mar 27 01:14:29 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yL2L-0006PO-00; Thu, 27 Mar 2003 01:14:29 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0F8361112F3; Thu, 27 Mar 2003 01:12:14 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA00175 for linac-eng-list; Wed, 26 Mar 2003 17:48:40 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from clift.nettas.net (clift.nettas.net [202.7.15.71]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA00171 for ; Wed, 26 Mar 2003 17:48:37 -0600 (CST) Received: from dchs6305.dchs.tas.gov.au ([147.109.23.26]) by clift.nettas.net (8.12.7/8.12.7) with ESMTP id h2QNnxOR009590 for ; Thu, 27 Mar 2003 10:49:59 +1100 (EST) Received: by DCHS6305 with Internet Mail Service (5.5.2655.55) id ; Thu, 27 Mar 2003 10:48:33 +1100 Message-ID: From: Causby Damian To: "'linac-eng@plato.aristotle.net'" Subject: clipper diodes Date: Thu, 27 Mar 2003 10:48:32 +1100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Causby Damian To: "'linac-eng@plato.aristotle.net'" Subject: clipper diodes Date: Thu, 27 Mar 2003 10:48:32 +1100 Sender: owner-linac-eng@plato.aristotle.net Hi all Thanks for all the responses about the clipper diodes, I haven't had another problem yet since replacing the the MOVs I will post again when it happens. I am still getting no output on 6e 9e etc on some mornings Damian Causby Engineering Operations Manager W.P. Holman Clinic Launceston General Hospital TAS, Australia ph 03 6348 7151 fax 03 6361 6371 damian.causby@dhhs.tas.gov.au 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Mar 27 13:56:22 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yWve-0003Yf-00; Thu, 27 Mar 2003 13:56:22 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E43CD1112F3; Thu, 27 Mar 2003 13:54:04 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id GAA09561 for linac-eng-list; Thu, 27 Mar 2003 06:23:38 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from intfw2.phci.org (user.phci.org [207.67.109.70]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id GAA09557 for ; Thu, 27 Mar 2003 06:23:37 -0600 (CST) Received: from intfw2.phci.org (root@localhost) by intfw2.phci.org with ESMTP id h2RCN6bh027325 for ; Thu, 27 Mar 2003 06:23:06 -0600 (CST) Received: from rwdmail.phci.org (smtpscan.phci.org [172.20.3.10]) by intfw2.phci.org with SMTP id h2RCN6Jx027322 for ; Thu, 27 Mar 2003 06:23:06 -0600 (CST) Received: through eSafe SMTP Relay 1048607800; Thu Mar 27 06:23:06 2003 Received: by phcimail.phci.org with Internet Mail Service (5.5.2653.19) id ; Thu, 27 Mar 2003 06:27:05 -0600 Message-ID: <7A3389A8D723D511B2260008C7B2BF390D60AA@wmhmail.phci.org> From: "Williams, Rod" To: linac-eng@plato.aristotle.net Subject: G.E CT SIM SCANNERS BE AFRAID BE VERY AFRAID Date: Thu, 27 Mar 2003 06:23:04 -0600 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F45B.9DDB9550" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Williams, Rod" To: linac-eng@plato.aristotle.net Subject: G.E CT SIM SCANNERS BE AFRAID BE VERY AFRAID Date: Thu, 27 Mar 2003 06:23:04 -0600 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2F45B.9DDB9550 Content-Type: text/plain; charset="iso-8859-1" Hi to all I have been involved in contract options on our GE MXI ct sim scanner and to my surprise I found that the X-Ray tube for this unit is priced at $175,000.00. this seems to be quite expensive for a scanner tube. This tube is the Preformix (proprietary) tube. This information might be useful for the sites that are thinking about going with GE for your therapy departments. The price quoted me for a 5 year full contract would be very close to the price of the scanner. As always Good Luck Rod This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. ------_=_NextPart_001_01C2F45B.9DDB9550 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable G.E CT SIM SCANNERS BE AFRAID BE VERY AFRAID

Hi to all

I have been involved in contract options o= n our GE MXI ct sim scanner and to my surprise I found that the X-Ray tub= e for this unit is priced at $175,000.00. this seems to be quite expensiv= e for a scanner tube. This tube is the Preformix (proprietary) tube. = ; This information might be useful for the sites that are thinking about = going with GE for your therapy departments. The price quoted me for a 5 y= ear full contract would be very close to the price of the scanner. =

As always Good Luck Rod

This information is confidential and int= ended solely for the use of the individual or entity to whom it is addres= sed.
If you have received this email in erro= r please notify the sender or our Help Desk at (262) 928-2777.

We have scanned this email and its attac= hments for malicious content.
However, the recipient should check thi= s email and any attachments for the presence of viruses.
ProHealth Care, Inc. accepts no liabili= ty for any damage caused by any virus transmitted by this email.

------_=_NextPart_001_01C2F45B.9DDB9550-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Mar 27 15:32:50 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yYR0-0004ak-00; Thu, 27 Mar 2003 15:32:50 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A80A71112F9; Thu, 27 Mar 2003 15:30:33 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA11104 for linac-eng-list; Thu, 27 Mar 2003 08:07:07 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from hccexch.harringtoncc.org ([207.19.3.226]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA11100 for ; Thu, 27 Mar 2003 08:07:00 -0600 (CST) content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Subject: RE: clipper diodes X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Thu, 27 Mar 2003 08:04:43 -0600 Message-ID: <2617828127B3A34CB94408B1507E9EEA7537AF@hccexch.harringtoncc.org> Thread-Topic: clipper diodes Thread-Index: AcLz/Rko6slhDomBQ0Koloj/VsmRAgAbD9LQ From: "Steve Robinson" To: "Causby Damian" Cc: Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA11101 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f content-class: urn:content-classes:message Subject: RE: clipper diodes X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Thu, 27 Mar 2003 08:04:43 -0600 Thread-Topic: clipper diodes Thread-Index: AcLz/Rko6slhDomBQ0Koloj/VsmRAgAbD9LQ From: "Steve Robinson" To: "Causby Damian" Cc: X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA11101 Sender: owner-linac-eng@plato.aristotle.net Damian, I just had a similar problem myself. In my case it showed up in a few more energies. Look at your RF DRV MTR in DAM on the service page. Compare these values with any older information you may have (I.E. event logs, morning checkouts, etc.) If this is not your problem, then some other value on that screen will lead in the right direction. Happy hunting. PS. Have tried to just tune these two energies? > -----Original Message----- > From: Causby Damian [SMTP:damian.causby@dhhs.tas.gov.au] > Sent: Wednesday, March 26, 2003 5:49 PM > To: 'linac-eng@plato.aristotle.net' > Subject: clipper diodes > > Hi all > Thanks for all the responses about the clipper diodes, I haven't had > another problem yet since replacing the the MOVs I will post again when it > happens. I am still getting no output on 6e 9e etc on some mornings > > Damian Causby > Engineering Operations Manager > W.P. Holman Clinic > Launceston General Hospital > TAS, Australia > ph 03 6348 7151 > fax 03 6361 6371 > damian.causby@dhhs.tas.gov.au > > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Mar 27 23:27:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yfqb-00065S-00; Thu, 27 Mar 2003 23:27:45 +0100 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 142AB1112FB; Thu, 27 Mar 2003 23:25:21 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id PAA18213 for linac-eng-list; Thu, 27 Mar 2003 15:53:48 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from smtp809.mail.sc5.yahoo.com (smtp809.mail.sc5.yahoo.com [66.163.168.188]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id PAA18209 for ; Thu, 27 Mar 2003 15:53:46 -0600 (CST) Received: from adsl-66-137-106-207.dsl.hstntx.swbell.net (HELO 3vhgn01) (linacs@swbell.net@66.137.106.207 with login) by smtp-sbc-v1.mail.vip.sc5.yahoo.com with SMTP; 27 Mar 2003 21:53:45 -0000 Message-ID: <003801c2f4ac$3bd719a0$cf6a8942@3vhgn01> From: "linacs" To: "Linac List" Subject: Thyratron CX 1559 Date: Thu, 27 Mar 2003 16:00:07 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0035_01C2F479.F017B1A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "linacs" To: "Linac List" Subject: Thyratron CX 1559 Date: Thu, 27 Mar 2003 16:00:07 -0600 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0035_01C2F479.F017B1A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Would anyone know of a source for a Thyratron CX 1559? Does EEV makes = one? It is used on a GE Orion linear accelerator. Thank you Luis Segovia ------=_NextPart_000_0035_01C2F479.F017B1A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Would anyone know of a source for a = Thyratron CX=20 1559? Does EEV makes one? It is used on a GE Orion linear=20 accelerator.

Thank you

Luis Segovia

------=_NextPart_000_0035_01C2F479.F017B1A0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 28 09:35:04 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18ypKK-0007aQ-00; Fri, 28 Mar 2003 09:35:04 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 7B5EA1112FA; Fri, 28 Mar 2003 09:32:43 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id CAA27148 for linac-eng-list; Fri, 28 Mar 2003 02:04:45 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from zw_ntserver_1.walcheren.ziekenhuis.nl ([212.115.200.190]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id CAA27144 for ; Fri, 28 Mar 2003 02:04:43 -0600 (CST) From: CJ.de.Bruijne@walcheren.ziekenhuis.nl Received: by ZW_NTSRV1-0 with Internet Mail Service (5.5.2653.19) id ; Fri, 28 Mar 2003 09:04:33 +0100 Message-ID: To: linac-eng@plato.aristotle.net Cc: MP.Spuij@walcheren.ziekenhuis.nl, HA.de.Zeeuw@walcheren.ziekenhuis.nl Subject: Invensys hydrolic actuator Date: Fri, 28 Mar 2003 09:04:28 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: CJ.de.Bruijne@walcheren.ziekenhuis.nl To: linac-eng@plato.aristotle.net Cc: MP.Spuij@walcheren.ziekenhuis.nl, HA.de.Zeeuw@walcheren.ziekenhuis.nl Subject: Invensys hydrolic actuator Date: Fri, 28 Mar 2003 09:04:28 +0100 Sender: owner-linac-eng@plato.aristotle.net Hi colleagues Yesterday our cl.2100 C (C2) machine was suddenly leaking oil out of the actuator of the watertemp.control system. (a red stinking fluid) We replaced the actuator (Invensys MP-5210-0-0-3) and we are in the air again. But in 20 (machine) years we never saw this happen. We wonder what could be the cause of this. Any ideas? TIA Keesjan de Bruijne Biomedical Engineer Ziekenhuis Walcheren Vlissingen, the Netherlands dep. DIA cj.de.bruijne@walcheren.ziekenhuis.nl 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 28 14:13:27 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18ytfj-0002li-00; Fri, 28 Mar 2003 14:13:27 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id EDF3E1112FD; Fri, 28 Mar 2003 14:11:04 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id GAA00140 for linac-eng-list; Fri, 28 Mar 2003 06:42:57 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsmq03.netvigator.com (imsmq03.netvigator.com [218.102.49.37]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id GAA00135 for ; Fri, 28 Mar 2003 06:42:54 -0600 (CST) Received: (qmail 9477 invoked from network); 28 Mar 2003 12:42:38 -0000 Received: from pcd336004.netvigator.com (HELO kyeung) (203.218.126.4) by imsmq03.netvigator.com with SMTP; 28 Mar 2003 12:42:38 -0000 Message-ID: <000a01c2f527$8175b5e0$233ffea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: Sensitivity of x-ray film cassette combination Date: Fri, 28 Mar 2003 20:42:33 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C2F56A.8F669B40" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: Sensitivity of x-ray film cassette combination Date: Fri, 28 Mar 2003 20:42:33 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C2F56A.8F669B40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, Is it possible to measure the speed or sensitivity of x-ray film = cassette combination in terms of ASA or ISO units? Could anyone advise details ? Thanks in advance. Kim Yeung ------=_NextPart_000_0007_01C2F56A.8F669B40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

Is it possible to measure the speed or = sensitivity=20 of x-ray film cassette combination in terms of ASA or ISO = units?

Could anyone advise = details ?

Thanks in advance.

Kim Yeung

------=_NextPart_000_0007_01C2F56A.8F669B40-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 28 14:44:50 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yuA6-0003JG-00; Fri, 28 Mar 2003 14:44:50 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 4FBE41112FD; Fri, 28 Mar 2003 14:42:28 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA00852 for linac-eng-list; Fri, 28 Mar 2003 07:21:09 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail.spectrum-health.org (mail.spectrum-health.org [167.73.110.31]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA00848 for ; Fri, 28 Mar 2003 07:21:08 -0600 (CST) From: neville.wiles@spectrum-health.org Received: from dcntmta02.spectrum-health.org ([10.100.17.6]) by mail.spectrum-health.org (SAVSMTP 3.0.0.44) with SMTP id M2003032808212425186 for ; Fri, 28 Mar 2003 08:21:24 -0500 Received: by dcntmta02.spectrum-health.org with Internet Mail Service (5.5.2653.19) id ; Fri, 28 Mar 2003 08:21:02 -0500 Message-ID: <9BA17E080E6CD51195EE0020484023FF9C79DA@dcntmsg03.spectrum-health.org> To: linac-eng@plato.aristotle.net Subject: 6/100 Date: Fri, 28 Mar 2003 08:21:39 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F52C.F752CC80" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: neville.wiles@spectrum-health.org To: linac-eng@plato.aristotle.net Subject: 6/100 Date: Fri, 28 Mar 2003 08:21:39 -0500 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2F52C.F752CC80 Content-Type: text/plain; charset="iso-8859-1" Hello all, Currently we have 6/100 S/N 394, which also has a CCX box connected to IMPAC. During "Rad-ON" it will go into Interrupt with no indicated interlock. Rad-On can be restarted by just pressing the button. Its very intermittent and it would be a great help if anyone has any idea on this. Thanks in advance, Neville Wiles Spectrum Health Grand Rapids, MI 616) 391-3639 Neville.Wiles@Spectrum-Health.org ------_=_NextPart_001_01C2F52C.F752CC80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 6/100

Hello all,

Currently we have 6/100 S/N 394, which also has a CCX = box connected to IMPAC. During "Rad-ON" it will go into = Interrupt with no indicated interlock. Rad-On can be restarted by = just pressing the button. Its very intermittent and it would be a = great help if anyone has any idea on this.

Thanks in advance,

Neville Wiles
Spectrum Health
Grand Rapids, MI
616) 391-3639
Neville.Wiles@Spectrum-Health.org

------_=_NextPart_001_01C2F52C.F752CC80-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 28 15:40:10 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yv1e-0004Rv-00; Fri, 28 Mar 2003 15:40:10 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 89A7311130A; Fri, 28 Mar 2003 15:37:47 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA02084 for linac-eng-list; Fri, 28 Mar 2003 08:12:00 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from titan.lhsc.on.ca (titan.lhsc.on.ca [142.158.2.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA02080 for ; Fri, 28 Mar 2003 08:11:58 -0600 (CST) From: Bob.Tonks@lrcc.on.ca Received: from mail.lrcc.on.ca (mail.lrcc.on.ca [142.158.120.242]) by titan.lhsc.on.ca (8.11.6+Sun/8.11.6) with SMTP id h2SEBQ013039; Fri, 28 Mar 2003 09:11:26 -0500 (EST) Received: by mail.lrcc.on.ca(Lotus SMTP MTA v4.6.7 (934.1 12-30-1999)) id 85256CF7.004D9A6E ; Fri, 28 Mar 2003 09:07:38 -0500 X-Lotus-FromDomain: LRCC To: CJ.de.Bruijne@walcheren.ziekenhuis.nl, linac-eng@plato.aristotle.net Message-ID: <85256CF7.004D9A35.00@mail.lrcc.on.ca> Date: Fri, 28 Mar 2003 09:07:37 -0500 Subject: Re: Invensys hydrolic actuator Mime-Version: 1.0 Content-type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Bob.Tonks@lrcc.on.ca X-Lotus-FromDomain: LRCC To: CJ.de.Bruijne@walcheren.ziekenhuis.nl, linac-eng@plato.aristotle.net Date: Fri, 28 Mar 2003 09:07:37 -0500 Subject: Re: Invensys hydrolic actuator Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net I have seen this a few times. They do run warm and eventually decide to throw up their insides. Over all though they run for a long time without many failures. At least they are easy to troubleshoot. Bob Tonks London Regional Cancer Centre 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 28 16:50:49 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yw81-0005FU-00; Fri, 28 Mar 2003 16:50:49 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A78771112FD; Fri, 28 Mar 2003 16:48:27 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA03071 for linac-eng-list; Fri, 28 Mar 2003 09:09:06 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from orcus.cancerboard.ab.ca (cancerserver.cancerboard.ab.ca [164.102.1.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA03067 for ; Fri, 28 Mar 2003 09:09:04 -0600 (CST) Received: from kurma.cancerboard.ab.ca (ccimail.cancerboard.ab.ca [164.102.152.198]) by orcus.cancerboard.ab.ca (8.11.6+Sun/8.10.2) with ESMTP id h2SFAFX05771; Fri, 28 Mar 2003 08:10:15 -0700 (MST) Received: from cancerboard.ab.ca ([164.102.250.127]) by kurma.cancerboard.ab.ca (Switch-2.2.1/Switch-2.2.0) with ESMTP id h2SF95A15703; Fri, 28 Mar 2003 08:09:05 -0700 (MST) Message-ID: <3E8466EF.58C8379A@cancerboard.ab.ca> Date: Fri, 28 Mar 2003 08:14:55 -0700 From: Len Johnson X-Mailer: Mozilla 4.7 [en] (Win95; I) X-Accept-Language: en MIME-Version: 1.0 To: CJ.de.Bruijne@walcheren.ziekenhuis.nl Cc: linac-eng@plato.aristotle.net, MP.Spuij@walcheren.ziekenhuis.nl, HA.de.Zeeuw@walcheren.ziekenhuis.nl Subject: Re: Invensys hydrolic actuator References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 28 Mar 2003 08:14:55 -0700 From: Len Johnson X-Accept-Language: en To: CJ.de.Bruijne@walcheren.ziekenhuis.nl Cc: linac-eng@plato.aristotle.net, MP.Spuij@walcheren.ziekenhuis.nl, HA.de.Zeeuw@walcheren.ziekenhuis.nl Subject: Re: Invensys hydrolic actuator Sender: owner-linac-eng@plato.aristotle.net Keesjan; The actuator is a hydraulic device. The hydraulic fluid is contained in a reservoir that has a delicate seal on the bottom. Two things can cause the seal to be broken. First thing is applying any force to the body of the actuator like attempting to turn it etc. The second thing is athe relative length of the operating stem of the valve with regards to the stroke of the actuator. When the valves are set-up there is a critical dimension that must not be exceeded or the valve operating stem will damage the actuator when the two are assembled together. The dimensions etc. are available from Barber-Colman/Invensys. I have the data sheets here if you cannot find them from your normal suppliers. Len Johnson CJ.de.Bruijne@walcheren.ziekenhuis.nl wrote: > Hi colleagues > > Yesterday our cl.2100 C (C2) machine was suddenly leaking oil out of the > actuator of the watertemp.control system. (a red stinking fluid) > We replaced the actuator (Invensys MP-5210-0-0-3) and we are in the air > again. > > But in 20 (machine) years we never saw this happen. > We wonder what could be the cause of this. > > Any ideas? > > TIA > Keesjan de Bruijne > Biomedical Engineer > Ziekenhuis Walcheren > Vlissingen, the Netherlands > dep. DIA > cj.de.bruijne@walcheren.ziekenhuis.nl 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 28 16:51:36 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18yw8m-0005Fk-00; Fri, 28 Mar 2003 16:51:36 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id C59581112FD; Fri, 28 Mar 2003 16:49:14 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA03362 for linac-eng-list; Fri, 28 Mar 2003 09:25:35 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICI.MGH.HARVARD.EDU (phsexchici.mgh.harvard.edu [132.183.126.51]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA03358 for ; Fri, 28 Mar 2003 09:25:33 -0600 (CST) Received: by phsexchici.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id ; Fri, 28 Mar 2003 10:25:02 -0500 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F149@phsexch6.partners.org> From: "Maddox, Buford J" To: "'Causby Damian'" , "'linac-eng@plato.aristotle.net'" Subject: RE: clipper diodes Date: Fri, 28 Mar 2003 10:25:00 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="ISO-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'Causby Damian'" , "'linac-eng@plato.aristotle.net'" Subject: RE: clipper diodes Date: Fri, 28 Mar 2003 10:25:00 -0500 Sender: owner-linac-eng@plato.aristotle.net It is not unusual for 6 and 9 e to be the first to start acting up in the morning when something has morning sickness, like the gun or RF driver. On several occasions I have found other modes starting to show signs in open loop when 6 and 9 are acting up. I would look open loop, see if you can recover with afc or pfn adj, ie, Rf system. .1 on pfn can be significant. If you can't see gun I on electrons, might watch it in xray. Let it cool 5 min, no mode, then mode it. I make an event with the key, use those values to compare with the failure event, for intermittents. The biggest problem of all is to get the therapists to let you look. I tell them that it will keep getting more aggravating until they let you find it. Good luck Jerry -----Original Message----- From: Causby Damian [mailto:damian.causby@dhhs.tas.gov.au] Sent: Wednesday, March 26, 2003 6:49 PM To: 'linac-eng@plato.aristotle.net' Subject: clipper diodes Hi all Thanks for all the responses about the clipper diodes, I haven't had another problem yet since replacing the the MOVs I will post again when it happens. I am still getting no output on 6e 9e etc on some mornings Damian Causby Engineering Operations Manager W.P. Holman Clinic Launceston General Hospital TAS, Australia ph 03 6348 7151 fax 03 6361 6371 damian.causby@dhhs.tas.gov.au 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 28 16:56:34 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18ywDa-0005Gx-00; Fri, 28 Mar 2003 16:56:34 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 01AF311130A; Fri, 28 Mar 2003 16:54:11 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA03500 for linac-eng-list; Fri, 28 Mar 2003 09:32:47 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICO.MGH.HARVARD.EDU (phsexchico.mgh.harvard.edu [132.183.126.50]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA03496 for ; Fri, 28 Mar 2003 09:32:41 -0600 (CST) Received: by phsexchico.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id ; Fri, 28 Mar 2003 10:32:10 -0500 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F14B@phsexch6.partners.org> From: "Maddox, Buford J" To: "'linacs'" , Linac List Subject: RE: Thyratron CX 1559 Date: Fri, 28 Mar 2003 10:32:08 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F53E.FAD28BB8" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'linacs'" , Linac List Subject: RE: Thyratron CX 1559 Date: Fri, 28 Mar 2003 10:32:08 -0500 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2F53E.FAD28BB8 Content-Type: text/plain; charset="iso-8859-1" Try Richardson Electronics, LTD. I believe that tube is also used in Mitsubishi Linacs. Jerry -----Original Message----- From: linacs [mailto:linacs@swbell.net] Sent: Thursday, March 27, 2003 5:00 PM To: Linac List Subject: Thyratron CX 1559 Would anyone know of a source for a Thyratron CX 1559? Does EEV makes one? It is used on a GE Orion linear accelerator. Thank you Luis Segovia ------_=_NextPart_001_01C2F53E.FAD28BB8 Content-Type: text/html; charset="iso-8859-1"

Try Richardson Electronics, LTD. I believe that tube is also used in Mitsubishi Linacs.

Jerry

-----Original Message-----
From: linacs [mailto:linacs@swbell.net]
Sent: Thursday, March 27, 2003 5:00 PM
To: Linac List
Subject: Thyratron CX 1559

Would anyone know of a source for a Thyratron CX 1559? Does EEV makes one? It is used on a GE Orion linear accelerator.

Thank you

Luis Segovia

------_=_NextPart_001_01C2F53E.FAD28BB8-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Mar 28 17:12:26 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18ywSw-0005JN-00; Fri, 28 Mar 2003 17:12:26 +0100 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 7D79C11130A; Fri, 28 Mar 2003 17:10:04 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id JAA03942 for linac-eng-list; Fri, 28 Mar 2003 09:46:19 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICI.MGH.HARVARD.EDU (phsexchici.mgh.harvard.edu [132.183.126.51]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA03938 for ; Fri, 28 Mar 2003 09:46:17 -0600 (CST) Received: by phsexchici.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id ; Fri, 28 Mar 2003 10:45:45 -0500 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F14D@phsexch6.partners.org> From: "Maddox, Buford J" To: "'neville.wiles@spectrum-health.org'" , linac-eng@plato.aristotle.net Subject: RE: 6/100 Date: Fri, 28 Mar 2003 10:45:43 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C2F540.F3FB2AD2" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'neville.wiles@spectrum-health.org'" , linac-eng@plato.aristotle.net Subject: RE: 6/100 Date: Fri, 28 Mar 2003 10:45:43 -0500 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2F540.F3FB2AD2 Content-Type: text/plain; charset="ISO-8859-1" Most of our problems with the CCX box were fixed with a new 1854 UART. I think you had to jumper a pin? -----Original Message----- From: neville.wiles@spectrum-health.org [mailto:neville.wiles@spectrum-health.org] Sent: Friday, March 28, 2003 8:22 AM To: linac-eng@plato.aristotle.net Subject: 6/100 Hello all, Currently we have 6/100 S/N 394, which also has a CCX box connected to IMPAC. During "Rad-ON" it will go into Interrupt with no indicated interlock. Rad-On can be restarted by just pressing the button. Its very intermittent and it would be a great help if anyone has any idea on this. Thanks in advance, Neville Wiles Spectrum Health Grand Rapids, MI 616) 391-3639 Neville.Wiles@Spectrum-Health.org ------_=_NextPart_001_01C2F540.F3FB2AD2 Content-Type: text/html; charset="ISO-8859-1" 6/100

Most of our problems with the CCX box were fixed with a new 1854 UART. I think you had to jumper a pin?

-----Original Message-----
From: neville.wiles@spectrum-health.org [mailto:neville.wiles@spectrum-health.org]
Sent: Friday, March 28, 2003 8:22 AM
To: linac-eng@plato.aristotle.net
Subject: 6/100

Hello all,

Currently we have 6/100 S/N 394, which also has a CCX box connected to IMPAC. During "Rad-ON" it will go into Interrupt with no indicated interlock. Rad-On can be restarted by just pressing the button. Its very intermittent and it would be a great help if anyone has any idea on this.

Thanks in advance,

Neville Wiles
Spectrum Health
Grand Rapids, MI
616) 391-3639
Neville.Wiles@Spectrum-Health.org

------_=_NextPart_001_01C2F540.F3FB2AD2-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Sun Mar 30 23:44:12 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18zkb6-0001Yc-00; Sun, 30 Mar 2003 23:44:12 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 087EC1112F3; Sun, 30 Mar 2003 23:40:38 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id PAA00607 for linac-eng-list; Sun, 30 Mar 2003 15:03:54 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA00603 for ; Sun, 30 Mar 2003 15:03:51 -0600 (CST) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h2UL3Zov030466 for ; Mon, 31 Mar 2003 09:03:36 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Mon, 31 Mar 2003 09:57:50 -0600 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Mon, 31 Mar 2003 09:03:13 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Mon, 31 Mar 2003 09:03:08 +1200 From: "Dave Pinchin" To: , Subject: Re: Invensys hydrolic actuator Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 31 Mar 2003 09:03:08 +1200 From: "Dave Pinchin" To: , Subject: Re: Invensys hydrolic actuator Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, We lost one on our C1 #40 several year ago. I think the real answer is that the leak happened because we didn't have a spare......... :D >>> 28/03/03 20:04:28 >>> Hi colleagues Yesterday our cl.2100 C (C2) machine was suddenly leaking oil out of the actuator of the watertemp.control system. (a red stinking fluid) We replaced the actuator (Invensys MP-5210-0-0-3) and we are in the air again. But in 20 (machine) years we never saw this happen. We wonder what could be the cause of this. Any ideas? TIA Keesjan de Bruijne Biomedical Engineer Ziekenhuis Walcheren Vlissingen, the Netherlands dep. DIA cj.de.bruijne@walcheren.ziekenhuis.nl ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 31 01:49:39 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18zmYV-0001fX-00; Mon, 31 Mar 2003 01:49:39 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A234E1112F4; Mon, 31 Mar 2003 01:46:07 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id RAA02703 for linac-eng-list; Sun, 30 Mar 2003 17:17:25 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA02699 for ; Sun, 30 Mar 2003 17:17:17 -0600 (CST) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h2UNH8ov013601 for ; Mon, 31 Mar 2003 11:17:08 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Mon, 31 Mar 2003 12:11:22 -0600 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Mon, 31 Mar 2003 11:16:45 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Mon, 31 Mar 2003 11:16:27 +1200 From: "Dave Pinchin" To: , Subject: Re: Invensys hydrolic actuator Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 31 Mar 2003 11:16:27 +1200 From: "Dave Pinchin" To: , Subject: Re: Invensys hydrolic actuator Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, 3rd law..... The reliability of any part is inversely proportional to the number of covers you have to remove to service it. 4th law.... The chances of a 'brilliant fix' actually working is inversly proportional to the number of witnesses you have at turn on. :D >>> Vince Reynolds 31/03/03 10:26:04 >>> So the 2nd Law of maintenance came into effect the 1st one being don't clear up your tools until you have run beam maybe we should get the list to define these laws? Vince Reynolds Royal North Shore Hospital Sydney >>> Dave Pinchin 03/31/03 07:03am >>> G'day, We lost one on our C1 #40 several year ago. I think the real answer is that the leak happened because we didn't have a spare......... :D >>> 28/03/03 20:04:28 >>> Hi colleagues Yesterday our cl.2100 C (C2) machine was suddenly leaking oil out of the actuator of the watertemp.control system. (a red stinking fluid) We replaced the actuator (Invensys MP-5210-0-0-3) and we are in the air again. But in 20 (machine) years we never saw this happen. We wonder what could be the cause of this. Any ideas? TIA Keesjan de Bruijne Biomedical Engineer Ziekenhuis Walcheren Vlissingen, the Netherlands dep. DIA cj.de.bruijne@walcheren.ziekenhuis.nl ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 31 04:28:17 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 18zp21-0001oC-00; Mon, 31 Mar 2003 04:28:17 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 38C141112F2; Mon, 31 Mar 2003 04:24:46 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id TAA05592 for linac-eng-list; Sun, 30 Mar 2003 19:54:33 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-r02.mx.aol.com (imo-r02.mx.aol.com [152.163.225.98]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id TAA05588 for ; Sun, 30 Mar 2003 19:54:32 -0600 (CST) From: GARRYANGEL@aol.com Received: from GARRYANGEL@aol.com by imo-r02.mx.aol.com (mail_out_v34.21.) id y.b8.3d28a602 (30960) for ; Sun, 30 Mar 2003 20:53:50 -0500 (EST) Message-ID: Date: Sun, 30 Mar 2003 20:53:50 EST Subject: "o1" Fault on Fischer HF Generator To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_b8.3d28a602.2bb8f9ae_boundary" X-Mailer: 8.0 for Windows sub 6011 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: GARRYANGEL@aol.com Date: Sun, 30 Mar 2003 20:53:50 EST Subject: "o1" Fault on Fischer HF Generator To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_b8.3d28a602.2bb8f9ae_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Everyone: I'm in the process of relocating a a Varian Ximatron CX with a Fischer HF generator. During checkout I'm able to take films, but experience the "o1" fault when attempting to run in the flouro mode. As near as I can tell Varian never used the "Cassette I/L" on these units. This particular unit never had a Cassette switch to begin with. Further, the Cassette SW LED is lit on the power supply board in the generator. Is this truely a "cassette switch" faoul or could this be another false Fischer fault path and there is soumthing else that is giving me the problem. Your inputs would be greatly appreciated. Garry --part1_b8.3d28a602.2bb8f9ae_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi Everyone:

I'm in the process of relocating a a Varian Ximatron CX with a Fischer HF ge= nerator. During checkout I'm able to take films, but experience the "o1" fau= lt when attempting to run in the flouro mode. As near as I can tell Varian n= ever used the "Cassette I/L" on these units. This particular unit never had=20= a Cassette switch to begin with. Further, the Cassette SW LED is lit on the=20= power supply board in the generator. Is this truely a "cassette switch" faou= l or could this be another false Fischer fault path and there is soumthing e= lse that is giving me the problem. Your inputs would be greatly appreciated.=

Garry --part1_b8.3d28a602.2bb8f9ae_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 31 17:43:47 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 1901Rr-00030h-00; Mon, 31 Mar 2003 17:43:47 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A75FE1112F4; Mon, 31 Mar 2003 17:40:10 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA14177 for linac-eng-list; Mon, 31 Mar 2003 09:07:18 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from cmailm2.svr.pol.co.uk (cmailm2.svr.pol.co.uk [195.92.193.210]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA14173 for ; Mon, 31 Mar 2003 09:07:15 -0600 (CST) Received: from modem-3319.antelope.dialup.pol.co.uk ([217.134.28.247] helo=kerryclark) by cmailm2.svr.pol.co.uk with smtp (Exim 4.14) id 1900sT-0005zp-GR; Mon, 31 Mar 2003 16:07:13 +0100 Message-ID: <001701c2f79b$09b14800$f71c86d9@kerryclark> From: "Kerry CLARK" To: "'linac'" , , Subject: Varian water systems -UK disposal Date: Tue, 1 Apr 2003 03:31:53 +1200 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01C2F7FF.3D814B80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Kerry CLARK" To: "'linac'" , , Subject: Varian water systems -UK disposal Date: Tue, 1 Apr 2003 03:31:53 +1200 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0012_01C2F7FF.3D814B80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi All, one especially to the Varian users in the UK, sorry if it's been = asked before but our centre has to new Varian's just coming out of = warranty. Water additives are you using them? If so how are you getting rid of the = used water? If not, how are you getting by? Thanks Kerry Clark Mount Vernon Cancer Centre ------=_NextPart_000_0012_01C2F7FF.3D814B80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi All, one especially to the Varian = users in the=20 UK, sorry if it's been asked before but our centre has to new Varian's = just=20 coming out of warranty.

Water additives are you using them? If = so how are=20 you getting rid of the used water?

If not, how are you getting = by?

Thanks

Kerry Clark

Mount Vernon Cancer=20 Centre

------=_NextPart_000_0012_01C2F7FF.3D814B80-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Mar 31 23:03:38 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 1906RO-0003WT-00; Mon, 31 Mar 2003 23:03:38 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A60FE1112F4; Mon, 31 Mar 2003 23:00:02 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA20208 for linac-eng-list; Mon, 31 Mar 2003 14:23:00 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA20201 for ; Mon, 31 Mar 2003 14:22:56 -0600 (CST) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h2VKMVov025533 for ; Tue, 1 Apr 2003 08:22:32 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Tue, 1 Apr 2003 09:17:43 -0600 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Tue, 01 Apr 2003 08:22:09 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Tue, 01 Apr 2003 08:21:51 +1200 From: "Dave Pinchin" To: , Subject: Re: Varian water systems -UK disposal Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 01 Apr 2003 08:21:51 +1200 From: "Dave Pinchin" To: , Subject: Re: Varian water systems -UK disposal Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, We are using the genuine Varian water additives. PROIR to using, we have had two major leaks in the BMAG and one kly sol. The theory of course is: 1. Anti corrosive additive. 2. anti gunge additive. (50 ml in 80 l) We use genuine V for 2 reasons. (bum covering) 1. If we have a BMAG failure again heads WILL roll if we are using a 'bodgy' part. 2. The list of ingeredients for the brew may not cover the ENTIRE list of ingredients. With regard to disposal. The anti corrosive is not a problem. But the anit-gunge has a high proportion of gluteraldehyde (ironic isn't it, we get rid of the stuff for health reasons out of our film processors and start using it in our real machines). I believe the stuff breaks down quite quickly. Nalco say it has a shelf life of only 2 yrs in it's highly concentrated form. But we are diluting it @ 50ml per 80 l (0.0625%). I suspect it breaks down in less than 6 months and is therefore not a problem to tip down the drain. Any other suggestions anybody???? Dave >>> "Kerry CLARK" 1/04/03 03:31:53 >>> Hi All, one especially to the Varian users in the UK, sorry if it's been asked before but our centre has to new Varian's just coming out of warranty. Water additives are you using them? If so how are you getting rid of the used water? If not, how are you getting by? Thanks Kerry Clark Mount Vernon Cancer Centre ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 02 15:20:44 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 190iAW-00027j-00; Wed, 02 Apr 2003 15:20:44 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id CA1B41112FB; Wed, 2 Apr 2003 15:16:59 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id GAA02516 for linac-eng-list; Wed, 2 Apr 2003 06:43:12 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsmq08.netvigator.com ([218.102.49.40]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id GAA02511 for ; Wed, 2 Apr 2003 06:42:39 -0600 (CST) Received: (qmail 5537 invoked from network); 2 Apr 2003 12:41:49 -0000 Received: from n218103170076.netvigator.com (HELO kyeung) (218.103.170.76) by imsmq08.netvigator.com with SMTP; 2 Apr 2003 12:41:49 -0000 Message-ID: <004001c2f915$39d3b380$97f5fea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: Ximatron AEC calibration Date: Wed, 2 Apr 2003 20:41:47 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003D_01C2F958.47D561C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: Ximatron AEC calibration Date: Wed, 2 Apr 2003 20:41:47 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_003D_01C2F958.47D561C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, Ximatron, C-series, AEC calibration Recently, our Hospital introduces a very high speed film cassette for = Ximatron, of which the manual states the suitable film cassettes = combinations of sensitivity are in the range 300~500ASA. Who do we test = the film cassette in terms of ASA unit? During the AEC calibration, we experience a problem of very low O.D. at = 60kV, i.e 0.5O.D. against 1.3 O.D. at 90kV , this may be due to the = characteristic of the film cassette. Could anyone advise how do calibration the AEC with a very high speed = film cassette combination? What are the range of data we change the AEC = curve? Any advice? Best regards, Kim Yeung =20 ------=_NextPart_000_003D_01C2F958.47D561C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

= Ximatron,=20 C-series, AEC calibration

Recently, our Hospital introduces a = very high speed=20 film cassette for Ximatron, of which the manual states the suitable = film cassettes combinations of sensitivity are in the range = 300~500ASA.=20 Who do we test the film cassette in terms of ASA unit?

During the AEC calibration, we = experience a=20 problem of very low O.D. at 60kV, i.e = 0.5O.D. against=20 1.3 O.D. at 90kV , this may be due to the characteristic of the = film=20 cassette.

Could anyone advise how do calibration = the AEC with=20 a very high speed film cassette combination? What are the range of data = we=20 change the AEC curve?

Any advice?

Best regards,

Kim = Yeung

------=_NextPart_000_003D_01C2F958.47D561C0-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 02 22:53:30 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 190pEg-00046B-00; Wed, 02 Apr 2003 22:53:30 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id CDCCC1112F3; Wed, 2 Apr 2003 22:49:35 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id NAA10319 for linac-eng-list; Wed, 2 Apr 2003 13:40:35 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from phsorcon02.phsor.org (phsor-nat1.providence.org [170.220.2.13] (may be forged)) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id NAA10315 for ; Wed, 2 Apr 2003 13:40:33 -0600 (CST) Received: by phsorcon02.phsor.org with Internet Mail Service (5.5.2653.19) id ; Wed, 2 Apr 2003 11:40:00 -0800 Message-ID: <0838AEB7ABB0C04481781A84D6DE7C6C18B2C8@phsormsg02.or.providence.org> From: "Wilson, Jim" To: "'Linac Bulletin Board Posting'" Subject: Varian Millennium MLC Dr Watson Messages Date: Wed, 2 Apr 2003 11:39:53 -0800 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Wilson, Jim" To: "'Linac Bulletin Board Posting'" Subject: Varian Millennium MLC Dr Watson Messages Date: Wed, 2 Apr 2003 11:39:53 -0800 Sender: owner-linac-eng@plato.aristotle.net After having a Varian 2100EX with the Millennium MLC for 10 months, we are now getting Dr Watson error flagging on the MLC computer. Is this a common occurrence for others who have this equipment? What are the potential ramifications of these errors? Thank you for your replies in advance. Jim Wilson Clinical Engineering Providence St.Vincent Hospital **************************************************************************** This message is intended for the sole use of the individual and entity to whom it is addressed, and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you are not the intended addressee, nor authorized to receive for the intended addressee, you are hereby notified that you may not use, copy, disclose or distribute to anyone the message or any information contained in the message. If you have received this message in error, please immediately advise the sender by reply email and delete the message. Thank you very much. 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 03 01:25:05 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 190rbN-0004Fr-00; Thu, 03 Apr 2003 01:25:05 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 509371112F7; Thu, 3 Apr 2003 01:21:20 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id QAA15260 for linac-eng-list; Wed, 2 Apr 2003 16:57:54 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from hotmail.com (oe47.law8.hotmail.com [216.33.240.19]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA15256 for ; Wed, 2 Apr 2003 16:57:49 -0600 (CST) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 2 Apr 2003 14:57:18 -0800 Received: from 198.160.134.100 by OE47.law8.internal.hotmail.com with DAV; Wed, 02 Apr 2003 22:57:18 +0000 X-Originating-IP: [198.160.134.100] X-Originating-Email: [villegaj@hotmail.com] From: "JoseV" To: "Wilson, Jim" Cc: References: <0838AEB7ABB0C04481781A84D6DE7C6C18B2C8@phsormsg02.or.providence.org> Subject: Re: Varian Millennium MLC Dr Watson Messages Date: Wed, 2 Apr 2003 17:55:33 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 Message-ID: X-OriginalArrivalTime: 02 Apr 2003 22:57:18.0545 (UTC) FILETIME=[362BC410:01C2F96B] Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f X-Originating-IP: [198.160.134.100] X-Originating-Email: [villegaj@hotmail.com] From: "JoseV" To: "Wilson, Jim" Cc: Subject: Re: Varian Millennium MLC Dr Watson Messages Date: Wed, 2 Apr 2003 17:55:33 -0500 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 X-OriginalArrivalTime: 02 Apr 2003 22:57:18.0545 (UTC) FILETIME=[362BC410:01C2F96B] Sender: owner-linac-eng@plato.aristotle.net Jim, This is not a MLC problem. This is network generated. check your spooler services configuration. Jose Villegas Baptist Hospital of Miami. ----- Original Message ----- From: Wilson, Jim To: 'Linac Bulletin Board Posting' Sent: Wednesday, April 02, 2003 2:39 PM Subject: Varian Millennium MLC Dr Watson Messages > After having a Varian 2100EX with the Millennium MLC for 10 months, we are > now getting Dr Watson error flagging on the MLC computer. Is this a common > occurrence for others who have this equipment? What are the potential > ramifications of these errors? Thank you for your replies in advance. > > Jim Wilson > Clinical Engineering > Providence St.Vincent Hospital > > > > **************************************************************************** > This message is intended for the sole use of the individual and entity to > whom it is addressed, and may contain information that is privileged, > confidential and exempt from disclosure under applicable law. If you are > not the intended addressee, nor authorized to receive for the intended > addressee, you are hereby notified that you may not use, copy, disclose or > distribute to anyone the message or any information contained in the > message. If you have received this message in error, please immediately > advise the sender by reply email and delete the message. Thank you very > much. > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 03 04:53:09 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 190uqj-0004QP-00; Thu, 03 Apr 2003 04:53:09 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 4610E1112FA; Thu, 3 Apr 2003 04:49:21 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id UAA19527 for linac-eng-list; Wed, 2 Apr 2003 20:23:34 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from uhura.concentric.net (uhura.concentric.net [206.173.118.93]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id UAA19523 for ; Wed, 2 Apr 2003 20:23:33 -0600 (CST) Received: from cliff.concentric.net (cliff.concentric.net [206.173.118.90]) by uhura.concentric.net [Concentric SMTP Routing 1.0] id h332NSi08145 for ; Wed, 2 Apr 2003 21:23:28 -0500 (EST) Received: from concentric.net (da001d0308.nyc-ny.osd.concentric.net [66.238.217.52]) by cliff.concentric.net (8.9.1a+patch) id VAA25210; Wed, 2 Apr 2003 21:23:27 -0500 (EST) Message-ID: <3E8B9ABD.7635B995@concentric.net> Date: Wed, 02 Apr 2003 21:21:49 -0500 From: Ann and Hobie Shackford Reply-To: hobies@concentric.net X-Mailer: Mozilla 4.8 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Linac Engineers Subject: Varian EDW early termination Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 02 Apr 2003 21:21:49 -0500 From: Ann and Hobie Shackford Reply-To: hobies@concentric.net X-Accept-Language: en To: Linac Engineers Subject: Varian EDW early termination Sender: owner-linac-eng@plato.aristotle.net A clinic nearby recently had an EDW field terminate about 20 monitor units early. Since I was involved with the commissioning of the wedge they asked if I knew of a procedure to finish the beam. I no longer work with Varians so I am not familiar with a restart procedure and I don't have manuals to check. Is there a restart procedure? I seem to remember that the EDW creates a log file. Can that be used to set up a finish beam? If the moving jaw position at the time of termination could be determined it should be easy enough to setup a finish beam. I figured that if anyone could answer this, this group could. Thanks for your assistance. Hobie Shackford Chief Medical Physicist Roger Williams Medical Center Providence, RI 02908 (401) 456-6528 hshackford@rwmc.org 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 03 13:09:54 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 1912bS-0000Ne-00; Thu, 03 Apr 2003 13:09:54 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 72A0B1112F3; Thu, 3 Apr 2003 13:06:02 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id EAA29185 for linac-eng-list; Thu, 3 Apr 2003 04:31:19 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail4.nhs.uk (mail4.nhs.uk [194.72.23.241]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id EAA29181 for ; Thu, 3 Apr 2003 04:31:17 -0600 (CST) From: David.Smith@arh.grampian.scot.nhs.uk Received: from hn-ext by mail4.nhs.uk (Sendmail 8.8.8) with esmtp id 1911za-0004BY-00; Thu, 03 Apr 2003 11:30:46 +0100 Received: from relay.nhs.uk (194.62.42.142) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E60771200599AE8 for linac-eng@plato.aristotle.net; Thu, 3 Apr 2003 11:30:46 +0100 Received: from mta.grampian.scot.nhs.uk (195.106.102.11) by relay.nhs.uk (Syntegra-2 7.0.008) id 3E8477E10010DACF for linac-eng@plato.aristotle.net; Thu, 3 Apr 2003 11:30:46 +0100 Received: from arh_mail.grampian.scot.nhs.uk (actually host arh.grampian.scot.nhs.uk) by mta.grampian.scot.nhs.uk with SMTP (Mailer) with ESMTP; Thu, 3 Apr 2003 11:27:26 +0100 Received: by arh.grampian.scot.nhs.uk with Internet Mail Service (5.5.2650.21) id ; Thu, 3 Apr 2003 11:30:54 +0100 Message-ID: <5FB97D7B340FD2118A6100A0C9A9A1F505D07D5A@arh.grampian.scot.nhs.uk> To: linac-eng@plato.aristotle.net Subject: Plasma Screens Date: Thu, 3 Apr 2003 11:30:51 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: David.Smith@arh.grampian.scot.nhs.uk To: linac-eng@plato.aristotle.net Subject: Plasma Screens Date: Thu, 3 Apr 2003 11:30:51 +0100 Sender: owner-linac-eng@plato.aristotle.net All, We recently installed in a treatment room a ceiling mounted projector in order to increase the size of the displayed machine data.So far after 3 months we have had no adverse radiation generated problems. We also back it up with a conventional monitor in case the bulb goes. A more expensive alternative might be to use large screen plasma displays without monitor back-up . Has any one any experience of how they stand up to radiation? Dave Smith (Aberdeen) 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 03 15:59:22 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 1915FS-0002SX-00; Thu, 03 Apr 2003 15:59:22 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 7571E1112F2; Thu, 3 Apr 2003 15:55:32 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA01975 for linac-eng-list; Thu, 3 Apr 2003 07:26:27 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail3.nhs.uk (mail3.nhs.uk [194.72.23.240]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA01971 for ; Thu, 3 Apr 2003 07:26:20 -0600 (CST) From: David.Smith@arh.grampian.scot.nhs.uk Received: from hn-ext by mail3.nhs.uk (Sendmail 8.8.8) with esmtp id 1914jG-0000c1-00; Thu, 03 Apr 2003 14:26:06 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B600615700 for linac-eng@plato.aristotle.net; Thu, 3 Apr 2003 14:26:03 +0100 Received: from mta.grampian.scot.nhs.uk (195.106.102.11) by relay.nhs.uk (Syntegra-1 7.0.008) id 3E8477B00011C22A; Thu, 3 Apr 2003 14:26:39 +0100 Received: from arh_mail.grampian.scot.nhs.uk (actually host arh.grampian.scot.nhs.uk) by mta.grampian.scot.nhs.uk with SMTP (Mailer) with ESMTP; Thu, 3 Apr 2003 14:22:49 +0100 Received: by arh.grampian.scot.nhs.uk with Internet Mail Service (5.5.2650.21) id ; Thu, 3 Apr 2003 14:26:15 +0100 Message-ID: <5FB97D7B340FD2118A6100A0C9A9A1F505D07D5C@arh.grampian.scot.nhs.uk> To: henrik.stensaker@helse-bergen.no Cc: linac-eng@plato.aristotle.net Subject: RE: Plasma Screens Date: Thu, 3 Apr 2003 14:26:14 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: David.Smith@arh.grampian.scot.nhs.uk To: henrik.stensaker@helse-bergen.no Cc: linac-eng@plato.aristotle.net Subject: RE: Plasma Screens Date: Thu, 3 Apr 2003 14:26:14 +0100 Sender: owner-linac-eng@plato.aristotle.net Henrik, Good to know that lcd type monitor's are ok with regard to radiation. We are pointing it at the opposite side to the maze. Because it is ceiling mounted, people in the beam are not a problem if they are working round about the table. The image is still pretty good with the lights fully on. Dave > ----Original Message----- > From: Henrik Stensaker [SMTP:henrik.stensaker@helse-bergen.no] > Sent: Thursday, April 03, 2003 1:07 PM > To: David.Smith > Subject: SV: Plasma Screens > > Hi! > > Very interesting idea, with projectors. > We are using 19" lcd monitors in one room, no problems so far. > We have two monitors one each side of gantry (machine parameters(Varian) > and VR system (Visir). > > What wall are you pointing the projector at? > Any problems with peoples in the projector beam? > And what about the light, do you have to dim the room to see anything? > > > > > Best regards, > Henrik Stensaker, Service engineer > Department of Oncology and Medical Physics > Section of Medical Physics > Haukeland University Hospital > N-5021 Bergen > Norway > > Tlf: +47 55972031 > Fax: +47 55976089 > Email: henrik.stensaker@helse-bergen.no > > > > > > -----Opprinnelig melding----- > Fra: David.Smith@arh.grampian.scot.nhs.uk > [mailto:David.Smith@arh.grampian.scot.nhs.uk] > Sendt: 3. april 2003 12:31 > Til: linac-eng@plato.aristotle.net > Emne: Plasma Screens > > > All, > > We recently installed in a treatment room a ceiling mounted projector in > order to increase the size of the displayed machine data.So far after 3 > months we have had no adverse radiation generated problems. We also back > it up with a conventional monitor in case the bulb goes. A more > expensive alternative might be to use large screen plasma displays > without monitor back-up . Has any one any experience of how they stand > up to radiation? > > Dave Smith (Aberdeen) 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 03 22:36:06 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 191BRO-0003v7-00; Thu, 03 Apr 2003 22:36:06 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 015691112F2; Thu, 3 Apr 2003 22:32:14 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id NAA10864 for linac-eng-list; Thu, 3 Apr 2003 13:56:21 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id NAA10860 for ; Thu, 3 Apr 2003 13:56:18 -0600 (CST) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Thu, 03 Apr 2003 15:54:36 -0400 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Date: Thu, 03 Apr 2003 15:54:30 -0400 From: "Carl Murphy" To: Subject: Lasers on wall or posts? Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id NAA10861 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 03 Apr 2003 15:54:30 -0400 From: "Carl Murphy" To: Subject: Lasers on wall or posts? Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id NAA10861 Sender: owner-linac-eng@plato.aristotle.net Hi all: We are going to remodel some of our suites soon. We presently have Cemar lasers and are going to go with LAP instead. Our present lasers are mounted on walls, but I have given some thought to buying the posts that mount in to the concrete floor. We have the posts in one of our CT Sim suites and we don't have any problems. We do notice, however, that the lasers in the treatment rooms mounted on the walls drift as the seasons change. Keep in mind, we are in Canada... and no, it isn't cold here all year long... it actually does get warm! The temperature can go from -15C in the winter to +30C in the summer, so this causes the exterior walls to move slightly. I would just like to know any other experiences with this. It's hard to blame the seasons, when we have found that the Cemar lasers were not a superior laser as compared to the LAP design. Thanks, Carl _________________________________ Carl Murphy, C.E.T. Linear Accelerator Service Technologist Medical Physics Department Nova Scotia Cancer Centre QEII Health Sciences Centre Halifax, Nova Scotia, Canada Email: carl.murphy@cdha.nshealth.ca This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 04 03:58:50 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 191GTi-0004IF-00; Fri, 04 Apr 2003 03:58:50 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0B6C11112F1; Fri, 4 Apr 2003 03:54:56 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id TAA17586 for linac-eng-list; Thu, 3 Apr 2003 19:23:38 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from uhura.concentric.net (uhura.concentric.net [206.173.118.93]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id TAA17582 for ; Thu, 3 Apr 2003 19:23:36 -0600 (CST) Received: from marconi.concentric.net (marconi.concentric.net [206.173.118.71]) by uhura.concentric.net [Concentric SMTP Routing 1.0] id h341NZi08583 for ; Thu, 3 Apr 2003 20:23:35 -0500 (EST) Received: from concentric.net (da001d0194.nyc-ny.osd.concentric.net [66.238.216.194]) by marconi.concentric.net (8.9.1a+patch) id UAA08533; Thu, 3 Apr 2003 20:23:34 -0500 (EST) Message-ID: <3E8CDE33.3A0B931B@concentric.net> Date: Thu, 03 Apr 2003 20:21:55 -0500 From: Ann and Hobie Shackford Reply-To: hobies@concentric.net X-Mailer: Mozilla 4.8 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Linac Engineers Subject: Re: Varian EDW early termination Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 03 Apr 2003 20:21:55 -0500 From: Ann and Hobie Shackford Reply-To: hobies@concentric.net X-Accept-Language: en To: Linac Engineers Subject: Re: Varian EDW early termination Sender: owner-linac-eng@plato.aristotle.net Thanks to all who replied. How many times have you said "when all else fails read the manual?" As I said, I don't have a Varian linac here (yet) and I assumed (we all know what that stands for) the clinic physicists had looked into that obvious source for an answer or that they called the Varian service engineer. I hope they read the manual for their IMRT implementation ;-) Hobie Shackford 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 04 05:31:48 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 191Hvg-0004Pz-00; Fri, 04 Apr 2003 05:31:48 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 41F6F1112F1 for ; Fri, 4 Apr 2003 05:27:57 +0100 (MET) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KUBGSSRKV48XYRMR@med.uu.nl> for kok@radth.med.uu.nl; Fri, 4 Apr 2003 05:26:44 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUBGSQSKPE8Y0YA9@med.uu.nl> for kok@radth.med.uu.nl; Fri, 04 Apr 2003 05:26:42 +0200 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id TAA17586 for linac-eng-list; Thu, 03 Apr 2003 19:23:38 -0600 (CST) Received: from uhura.concentric.net (uhura.concentric.net [206.173.118.93]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id TAA17582 for ; Thu, 03 Apr 2003 19:23:36 -0600 (CST) Received: from marconi.concentric.net (marconi.concentric.net [206.173.118.71]) by uhura.concentric.net [Concentric SMTP Routing 1.0] id h341NZi08583 for ; Thu, 03 Apr 2003 20:23:35 -0500 (EST) Received: from concentric.net (da001d0194.nyc-ny.osd.concentric.net [66.238.216.194]) by marconi.concentric.net (8.9.1a+patch) id UAA08533; Thu, 03 Apr 2003 20:23:34 -0500 (EST) Date: Thu, 03 Apr 2003 20:21:55 -0500 From: Ann and Hobie Shackford Subject: Re: Varian EDW early termination Sender: owner-linac-eng@plato.aristotle.net To: Linac Engineers Reply-To: hobies@concentric.net Message-id: <3E8CDE33.3A0B931B@concentric.net> MIME-version: 1.0 X-Mailer: Mozilla 4.8 [en] (Win98; U) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit Precedence: bulk X-Accept-Language: en X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 03 Apr 2003 20:21:55 -0500 From: Ann and Hobie Shackford Subject: Re: Varian EDW early termination Sender: owner-linac-eng@plato.aristotle.net To: Linac Engineers Reply-To: hobies@concentric.net X-Accept-Language: en X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Thanks to all who replied. How many times have you said "when all else fails read the manual?" As I said, I don't have a Varian linac here (yet) and I assumed (we all know what that stands for) the clinic physicists had looked into that obvious source for an answer or that they called the Varian service engineer. I hope they read the manual for their IMRT implementation ;-) Hobie Shackford 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 04 15:40:33 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 191RQn-0001ZQ-00; Fri, 04 Apr 2003 15:40:33 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 9CC661112F1; Fri, 4 Apr 2003 15:36:37 +0100 (MET) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA23320 for linac-eng-list; Fri, 4 Apr 2003 07:06:27 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsmq03.netvigator.com (imsmq03.netvigator.com [218.102.49.37]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA23316 for ; Fri, 4 Apr 2003 07:06:24 -0600 (CST) Received: (qmail 23014 invoked from network); 4 Apr 2003 12:24:18 -0000 Received: from n218103170213.netvigator.com (HELO kyeung) (218.103.170.213) by imsmq03.netvigator.com with SMTP; 4 Apr 2003 12:24:18 -0000 Message-ID: <006c01c2faa5$1a60e220$970ffea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: X-ray filem cassette combination Date: Fri, 4 Apr 2003 20:24:13 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0069_01C2FAE8.285968A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: X-ray filem cassette combination Date: Fri, 4 Apr 2003 20:24:13 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0069_01C2FAE8.285968A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, Does anyone have any experience with the Kodak film cassette ,Lanex = screen with MXG-1 film?=20 It seems the film cassette shows "high speed" at kV conditions, i.e. = above 80kV, and poor response below 70kV. Any comments on the above issues? Best regards, Kim Yeung ------=_NextPart_000_0069_01C2FAE8.285968A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

Does anyone have any experience with = the Kodak film=20 cassette ,Lanex screen with MXG-1 film?

It seems the film cassette shows = "high speed"=20 at kV conditions, i.e. above 80kV, and poor response below=20 70kV.

Any comments on the above = issues?

Best regards,

Kim Yeung

------=_NextPart_000_0069_01C2FAE8.285968A0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 04 23:14:17 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 191YVs-00034W-00; Fri, 04 Apr 2003 23:14:16 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E84D01112FC; Fri, 4 Apr 2003 23:10:19 +0100 (MET) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA13395 for linac-eng-list; Fri, 4 Apr 2003 14:34:01 -0600 (CST) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from gwia.slrmc.org (gwia.slrmc.org [199.99.194.3]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id OAA13343 for ; Fri, 4 Apr 2003 14:33:57 -0600 (CST) Received: from SL_DOM-Message_Server by gwia.slrmc.org with Novell_GroupWise; Fri, 04 Apr 2003 13:33:18 -0700 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.6.1 Date: Fri, 04 Apr 2003 13:33:14 -0700 From: "Robert Wood" To: Subject: Looking for a Physicist Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=_2976971E.BCDDA63F" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 04 Apr 2003 13:33:14 -0700 From: "Robert Wood" To: Subject: Looking for a Physicist Sender: owner-linac-eng@plato.aristotle.net This is a MIME message. If you are reading this text, you may want to consider changing to a mail reader or gateway that understands how to properly handle MIME multipart messages. --=_2976971E.BCDDA63F Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Rumor has it that we will be looking for a Physiscist. Anyone know of a = good one looking to come to the beautiful Northwest. We have four clinics in the Boise area, we will be putting a new 21EX in = our downtown site, hopefully in Oct. We have IMRT coming up in the near future. We are a very progressive site and I thought I would just give heads up to = the Physic's community in the hopes that someone might be interested. Interested parties can contact Jeff Fairbanks, Phd, at 208-706-1412 email fairbanj@slrmc.org --=_2976971E.BCDDA63F Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

Rumor has it that we will be looking = for a=20 Physiscist. Anyone know of a good one looking to come to the = beautiful=20 Northwest.

We have four clinics in the Boise = area, we will=20 be putting a new 21EX in our downtown site, hopefully in Oct.

We have IMRT coming up in the near=20 future.

We are a very progressive site and I = thought I=20 would just give heads up to the Physic's community in the hopes that = someone=20 might be interested.

Interested parties can contact Jeff = Fairbanks,=20 Phd, at 208-706-1412

email =20 fairbanj@slrmc.org

--=_2976971E.BCDDA63F-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 07 08:12:40 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192Ps0-000810-00; Mon, 07 Apr 2003 08:12:40 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8BE011105E8; Mon, 7 Apr 2003 09:08:28 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id AAA03982 for linac-eng-list; Mon, 7 Apr 2003 00:33:33 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from gw.cs.nsw.gov.au (gw1.cs.nsw.gov.au [152.76.0.130]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id AAA03875 for ; Mon, 7 Apr 2003 00:31:55 -0500 (CDT) Received: from funnelweb.cs.nsw.gov.au ([152.76.42.4]) by gw1.gw.cs.nsw.gov.au with ESMTP id <118362>; Mon, 7 Apr 2003 15:31:22 +1000 Received: from email.cs.nsw.gov.au ([152.76.41.7]) by funnelweb.cs.nsw.gov.au (Post.Office MTA v3.5.1 release 219 ID# 0-0U10L2S100) with ESMTP id au; Mon, 7 Apr 2003 15:31:21 +1000 Received: from radoncpws04 [152.76.19.85] by email.cs.nsw.gov.au (SMTPD32-6.06) id AD204B7D0110; Mon, 07 Apr 2003 15:31:12 +1000 Message-ID: <01c201c2fcc6$beb4f690$55134c98@radonc.rpa.cs.nsw.gov.au> From: "Virendra Patel" To: "Carl Murphy" , References: Subject: Re: Lasers on wall or posts? Date: Mon, 7 Apr 2003 15:30:04 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Virendra Patel" To: "Carl Murphy" , Subject: Re: Lasers on wall or posts? Date: Mon, 7 Apr 2003 15:30:04 +1000 X-Priority: 3 X-MSMail-Priority: Normal X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Sender: owner-linac-eng@plato.aristotle.net Carl We had the same experience in our department. One wall in our simulator room is facing west and we noticed that the laser mounted on that wall needed to be adjusted on almost daily basis. We also noticed that the shift was more on extreme hot or cold days. A few months back we had the laser mounted on an independently standing post. We have not had any problems since then except for a very minor adjustment say once every six or eight weeks. Regards Virendra Patel Senior Physicist Department of Radiation Oncology Royal Prince Alfred Hospital Missenden Road Camperdown NSW 2050 Australia email : vpatel@email.cs.nsw.gov.au ----- Original Message ----- From: "Carl Murphy" To: Sent: Friday, April 04, 2003 5:54 AM Subject: Lasers on wall or posts? > Hi all: > > We are going to remodel some of our suites soon. We presently have Cemar lasers and are going to go with LAP instead. Our present lasers are mounted on walls, but I have given some thought to buying the posts that mount in to the concrete floor. > > We have the posts in one of our CT Sim suites and we don't have any problems. We do notice, however, that the lasers in the treatment rooms mounted on the walls drift as the seasons change. Keep in mind, we are in Canada... and no, it isn't cold here all year long... it actually does get warm! The temperature can go from -15C in the winter to +30C in the summer, so this causes the exterior walls to move slightly. > > I would just like to know any other experiences with this. It's hard to blame the seasons, when we have found that the Cemar lasers were not a superior laser as compared to the LAP design. > > Thanks, > > Carl > > _________________________________ > Carl Murphy, C.E.T. > Linear Accelerator Service Technologist > Medical Physics Department > Nova Scotia Cancer Centre > QEII Health Sciences Centre > Halifax, Nova Scotia, Canada > Email: carl.murphy@cdha.nshealth.ca > > This email message may contain confidential information and is intended > only for the individual named. If you are not the named addressee > you should not disseminate, distribute or copy this email. > Please notify the sender immediately by email if you have received > this email by mistake and delete this email from your system. > Email transmissions cannot be guaranteed to be secure or error > free as information could be intercepted, corrupted, lost, destroyed, > arrive late or incomplete, or contain viruses. The sender > therefore does not accept any liability for errors or omissions in > the contents of this message that arise as a result of email > transmissions. If verification is required please request a hard > copy version. > > 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 07 09:30:51 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192R5f-00008L-00; Mon, 07 Apr 2003 09:30:51 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 42F241112F1 for ; Mon, 7 Apr 2003 10:26:45 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KUFW0H1RHC8WX06Z@med.uu.nl> for kok@radth.med.uu.nl; Mon, 7 Apr 2003 09:25:16 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUFW0FL9WC8Y467B@med.uu.nl> for kok@radth.med.uu.nl; Mon, 07 Apr 2003 09:25:11 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id AAA03982 for linac-eng-list; Mon, 07 Apr 2003 00:33:33 -0500 (CDT) Received: from gw.cs.nsw.gov.au (gw1.cs.nsw.gov.au [152.76.0.130]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id AAA03875 for ; Mon, 07 Apr 2003 00:31:55 -0500 (CDT) Received: from funnelweb.cs.nsw.gov.au ([152.76.42.4]) by gw1.gw.cs.nsw.gov.au with ESMTP id <118362>; Mon, 07 Apr 2003 15:31:22 +1000 Received: from email.cs.nsw.gov.au ([152.76.41.7]) by funnelweb.cs.nsw.gov.au (Post.Office MTA v3.5.1 release 219 ID# 0-0U10L2S100) with ESMTP id au; Mon, 07 Apr 2003 15:31:21 +1000 Received: from radoncpws04 [152.76.19.85] by email.cs.nsw.gov.au (SMTPD32-6.06) id AD204B7D0110; Mon, 07 Apr 2003 15:31:12 +1000 Date: Mon, 07 Apr 2003 15:30:04 +1000 From: Virendra Patel Subject: Re: Lasers on wall or posts? Sender: owner-linac-eng@plato.aristotle.net To: Carl Murphy , linac-eng@plato.aristotle.net Message-id: <01c201c2fcc6$beb4f690$55134c98@radonc.rpa.cs.nsw.gov.au> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Mailer: Microsoft Outlook Express 5.50.4522.1200 Content-type: text/plain; charset="iso-8859-1" Content-transfer-encoding: 7bit X-Priority: 3 X-MSMail-priority: Normal Precedence: bulk References: X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Mon, 07 Apr 2003 15:30:04 +1000 From: Virendra Patel Subject: Re: Lasers on wall or posts? Sender: owner-linac-eng@plato.aristotle.net To: Carl Murphy , linac-eng@plato.aristotle.net X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Priority: 3 X-MSMail-priority: Normal X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Carl We had the same experience in our department. One wall in our simulator room is facing west and we noticed that the laser mounted on that wall needed to be adjusted on almost daily basis. We also noticed that the shift was more on extreme hot or cold days. A few months back we had the laser mounted on an independently standing post. We have not had any problems since then except for a very minor adjustment say once every six or eight weeks. Regards Virendra Patel Senior Physicist Department of Radiation Oncology Royal Prince Alfred Hospital Missenden Road Camperdown NSW 2050 Australia email : vpatel@email.cs.nsw.gov.au ----- Original Message ----- From: "Carl Murphy" To: Sent: Friday, April 04, 2003 5:54 AM Subject: Lasers on wall or posts? > Hi all: > > We are going to remodel some of our suites soon. We presently have Cemar lasers and are going to go with LAP instead. Our present lasers are mounted on walls, but I have given some thought to buying the posts that mount in to the concrete floor. > > We have the posts in one of our CT Sim suites and we don't have any problems. We do notice, however, that the lasers in the treatment rooms mounted on the walls drift as the seasons change. Keep in mind, we are in Canada... and no, it isn't cold here all year long... it actually does get warm! The temperature can go from -15C in the winter to +30C in the summer, so this causes the exterior walls to move slightly. > > I would just like to know any other experiences with this. It's hard to blame the seasons, when we have found that the Cemar lasers were not a superior laser as compared to the LAP design. > > Thanks, > > Carl > > _________________________________ > Carl Murphy, C.E.T. > Linear Accelerator Service Technologist > Medical Physics Department > Nova Scotia Cancer Centre > QEII Health Sciences Centre > Halifax, Nova Scotia, Canada > Email: carl.murphy@cdha.nshealth.ca > > This email message may contain confidential information and is intended > only for the individual named. If you are not the named addressee > you should not disseminate, distribute or copy this email. > Please notify the sender immediately by email if you have received > this email by mistake and delete this email from your system. > Email transmissions cannot be guaranteed to be secure or error > free as information could be intercepted, corrupted, lost, destroyed, > arrive late or incomplete, or contain viruses. The sender > therefore does not accept any liability for errors or omissions in > the contents of this message that arise as a result of email > transmissions. If verification is required please request a hard > copy version. > > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 07 13:34:42 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192Utd-00041j-00; Mon, 07 Apr 2003 13:34:41 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8290C1112F9; Mon, 7 Apr 2003 14:30:31 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id GAA14269 for linac-eng-list; Mon, 7 Apr 2003 06:00:17 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail1.nhs.uk (mail1.nhs.uk [213.120.235.81]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id GAA14263 for ; Mon, 7 Apr 2003 06:00:15 -0500 (CDT) Received: from hn-ext by mail1.nhs.uk (Sendmail 8.8.8) with esmtp id 192ULo-0004Fm-00; Mon, 07 Apr 2003 11:59:44 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B60067F7B8 for linac-eng@plato.aristotle.net; Mon, 7 Apr 2003 11:59:40 +0100 Received: from smtp.leedsth.nhs.uk (163.160.107.2) by relay.nhs.uk (Syntegra-4 7.0.008) (authenticated as smtp_leedsth_nhs_uk@es2002.nhs.uk) id 3E9138A900010BBC for linac-eng@plato.aristotle.net; Mon, 7 Apr 2003 11:59:44 +0100 Received: from LTH-MTA by smtp.leedsth.nhs.uk with Novell_GroupWise; Mon, 07 Apr 2003 11:59:52 +0100 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Mon, 07 Apr 2003 11:59:38 +0100 From: "Bob Wheller" To: Subject: UK Elekta Linac user group meeting Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id GAA14266 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 07 Apr 2003 11:59:38 +0100 From: "Bob Wheller" To: Subject: UK Elekta Linac user group meeting Content-Disposition: inline X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id GAA14266 Sender: owner-linac-eng@plato.aristotle.net This years UK Elekta Linac user group will be held at the NYCRIS conference suite at Cookridge Hospital in Leeds on the 24th April 2003. The event is aimed at technical and scientific staff who are involved in the maintenance and management of Elekta linacs. As well as discussion about major technical issues, Elekta representatives will present new developments and future release information. Applications to attend should be made to Bernard Russell at the Royal Free Hospital Bernard Russell Lead Radiotherapy Technologist Royal Free Hospital Pond Street, Hampstead London NW3 2QG Phone: 0207 7940500 Ext 3212 Bleep: 663 Email - Bernard.Russell@royalfree.nhs.uk 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 07 14:59:43 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192WDv-0005BR-00; Mon, 07 Apr 2003 14:59:43 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 5B2331112FA for ; Mon, 7 Apr 2003 15:55:35 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KUG7HFSLHC8X00BC@med.uu.nl> for kok@radth.med.uu.nl; Mon, 7 Apr 2003 14:54:14 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUG7HD1JOK8X3LLP@med.uu.nl> for kok@radth.med.uu.nl; Mon, 07 Apr 2003 14:54:11 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id GAA14269 for linac-eng-list; Mon, 07 Apr 2003 06:00:17 -0500 (CDT) Received: from mail1.nhs.uk (mail1.nhs.uk [213.120.235.81]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id GAA14263 for ; Mon, 07 Apr 2003 06:00:15 -0500 (CDT) Received: from hn-ext by mail1.nhs.uk (Sendmail 8.8.8) with esmtp id 192ULo-0004Fm-00; Mon, 07 Apr 2003 11:59:44 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B60067F7B8 for linac-eng@plato.aristotle.net; Mon, 07 Apr 2003 11:59:40 +0100 Received: from smtp.leedsth.nhs.uk (163.160.107.2) by relay.nhs.uk (Syntegra-4 7.0.008) (authenticated as smtp_leedsth_nhs_uk@es2002.nhs.uk) id 3E9138A900010BBC for linac-eng@plato.aristotle.net; Mon, 07 Apr 2003 11:59:44 +0100 Received: from LTH-MTA by smtp.leedsth.nhs.uk with Novell_GroupWise; Mon, 07 Apr 2003 11:59:52 +0100 Date: Mon, 07 Apr 2003 11:59:38 +0100 From: Bob Wheller Subject: UK Elekta Linac user group meeting Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net Message-id: MIME-version: 1.0 X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id GAA14266 X-Mailer: Novell GroupWise Internet Agent 6.0.2 Content-type: text/plain; charset=US-ASCII Content-disposition: inline Content-transfer-encoding: 8bit Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Mon, 07 Apr 2003 11:59:38 +0100 From: Bob Wheller Subject: UK Elekta Linac user group meeting Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id GAA14266 Content-disposition: inline X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This years UK Elekta Linac user group will be held at the NYCRIS conference suite at Cookridge Hospital in Leeds on the 24th April 2003. The event is aimed at technical and scientific staff who are involved in the maintenance and management of Elekta linacs. As well as discussion about major technical issues, Elekta representatives will present new developments and future release information. Applications to attend should be made to Bernard Russell at the Royal Free Hospital Bernard Russell Lead Radiotherapy Technologist Royal Free Hospital Pond Street, Hampstead London NW3 2QG Phone: 0207 7940500 Ext 3212 Bleep: 663 Email - Bernard.Russell@royalfree.nhs.uk 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 08 03:06:21 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192hZ5-0007Wm-00; Tue, 08 Apr 2003 03:06:19 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id C3FD8111317; Tue, 8 Apr 2003 04:02:06 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id TAA29307 for linac-eng-list; Mon, 7 Apr 2003 19:32:57 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id TAA29303 for ; Mon, 7 Apr 2003 19:32:52 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h380WKK6031421 for ; Tue, 8 Apr 2003 12:32:34 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Tue, 8 Apr 2003 14:26:57 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Tue, 08 Apr 2003 12:31:55 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Tue, 08 Apr 2003 12:31:52 +1200 From: "Dave Pinchin" To: Subject: ghosts ????? Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 08 Apr 2003 12:31:52 +1200 From: "Dave Pinchin" To: Subject: ghosts ????? Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, We have an unusual occurance, several in fact. On our Varain 600C there has been instances of the room lights toggling off/on about 4 times per day. The coll has also toggled from asym to sym spontaneously. Today the couch rotation moved and the couch lat moved. Rather worrying as none of the MEBs were activated (apparently). I have swapped both pendants with another room (2100C #40), I have overhauled the side panels. This morning our 2100CD #1164 did a similar thing with the lights and asym/sym. I have never seen anything so weird with our Varian machines in my 25 linac*years. I'm beginning to believe in ghosts and other spooky things. Any rational suggestions please........ :( ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 08 05:10:54 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192jVd-0007ee-00; Tue, 08 Apr 2003 05:10:53 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id C70ED11131D; Tue, 8 Apr 2003 06:06:41 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id VAA06457 for linac-eng-list; Mon, 7 Apr 2003 21:43:42 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mailm.adhb.govt.nz (smtp.akhealth.co.nz [210.54.227.226]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id VAA06452 for ; Mon, 7 Apr 2003 21:43:40 -0500 (CDT) Received: from exchange02.ahsl.co.nz (Not Verified[10.30.2.23]) by mailm.adhb.govt.nz with MailMarshal (v5,0,3,59) id ; Tue, 08 Apr 2003 14:42:15 +1200 Received: by exchange02.ahsl.co.nz with Internet Mail Service (5.5.2653.19) id ; Tue, 8 Apr 2003 14:43:12 +1200 Message-ID: From: Craig Pearce To: "'linac eng'" Subject: Decommissioning of CL2500 Date: Tue, 8 Apr 2003 14:44:29 +1200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Craig Pearce To: "'linac eng'" Subject: Decommissioning of CL2500 Date: Tue, 8 Apr 2003 14:44:29 +1200 Sender: owner-linac-eng@plato.aristotle.net Hello all We are currently decommissioning our CL2500. If any one has a particular request of parts from this machine to service their CL2500 please drop me a line. Craig Pearce Technical Officer Clinical Engineering Auckland District Health Board Building 13 Auckland Hospital Auckland New Zealand Ph 649 3074949 ext. 6213 Fax 649 3078948 craigp@adhb.govt.nz 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 08 16:01:04 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192teq-0007PM-00; Tue, 08 Apr 2003 16:01:04 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 6E3D41112F1; Tue, 8 Apr 2003 16:56:49 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA06582 for linac-eng-list; Tue, 8 Apr 2003 08:25:06 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from titan.lhsc.on.ca (titan.lhsc.on.ca [142.158.2.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA06578 for ; Tue, 8 Apr 2003 08:25:04 -0500 (CDT) From: Bob.Tonks@lrcc.on.ca Received: from mail.lrcc.on.ca (mail.lrcc.on.ca [142.158.120.242]) by titan.lhsc.on.ca (8.11.6+Sun/8.11.6) with SMTP id h38DOE015635; Tue, 8 Apr 2003 09:24:14 -0400 (EDT) Received: by mail.lrcc.on.ca(Lotus SMTP MTA v4.6.7 (934.1 12-30-1999)) id 85256D02.00499FD2 ; Tue, 8 Apr 2003 09:24:10 -0400 X-Lotus-FromDomain: LRCC To: "Dave Pinchin" , linac-eng@plato.aristotle.net Message-ID: <85256D02.00499DF3.00@mail.lrcc.on.ca> Date: Tue, 8 Apr 2003 09:24:05 -0400 Subject: Re: ghosts ????? Mime-Version: 1.0 Content-type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Bob.Tonks@lrcc.on.ca X-Lotus-FromDomain: LRCC To: "Dave Pinchin" , linac-eng@plato.aristotle.net Date: Tue, 8 Apr 2003 09:24:05 -0400 Subject: Re: ghosts ????? Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net We had the same problem with lights and such but no motions. It ended up being one of the hand controls. The little blue ribbon cable connector on the back of the hand control circuit board was unplugged slightly. This was on the newer controls with only one surface mounted circuit boards. Something to try, Bob Tonks London Regional Cancer Centre London, Ontario, Canada 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 08 16:17:41 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192tuv-0007aU-00; Tue, 08 Apr 2003 16:17:41 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id AF5401112F1; Tue, 8 Apr 2003 17:13:27 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA06748 for linac-eng-list; Tue, 8 Apr 2003 08:35:12 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from hccexch.harringtoncc.org ([207.19.3.226]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA06741 for ; Tue, 8 Apr 2003 08:35:09 -0500 (CDT) content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Subject: RE: ghosts ????? X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Tue, 8 Apr 2003 08:33:15 -0500 Message-ID: <2617828127B3A34CB94408B1507E9EEA7537B0@hccexch.harringtoncc.org> Thread-Topic: ghosts ????? Thread-Index: AcL9choKOuaXtzYoQUqd3qe+ewzIxQAX2Y9g From: "Steve Robinson" To: "Dave Pinchin" Cc: Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA06742 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f content-class: urn:content-classes:message Subject: RE: ghosts ????? X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Tue, 8 Apr 2003 08:33:15 -0500 Thread-Topic: ghosts ????? Thread-Index: AcL9choKOuaXtzYoQUqd3qe+ewzIxQAX2Y9g From: "Steve Robinson" To: "Dave Pinchin" Cc: X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA06742 Sender: owner-linac-eng@plato.aristotle.net Dave, It sounds like you may have a wild one on your hands. I don't have either one of the units that you mentioned as having these problems on so I can only tell you a story. I do have a simulator that acted strange with regard to movements. I had a SIM unload command that would not terminate with the release of MEB. It took a second or two before all movements would stop. The problem ended up being a loose connector housing hold-down nut at the base of the couch. I guess some stray EMF would build up and make the unit think MEB was still enabled. All I do know for a fact is that once these bayonet connector housings where retighten, the problem went away. How does that cause the lights to turn on/off or SYM/ASYM, who knows yet. I still believe a loose ground in the pendant system. Happy hunting > -----Original Message----- > From: Dave Pinchin [SMTP:Dave.Pinchin@cdhb.govt.nz] > Sent: Monday, April 07, 2003 7:32 PM > To: linac-eng@plato.aristotle.net > Subject: ghosts ????? > > G'day, > We have an unusual occurance, several in fact. > On our Varain 600C there has been instances of the room lights toggling > off/on about 4 times per day. The coll has also toggled from asym to sym > spontaneously. Today the couch rotation moved and the couch lat moved. > Rather worrying as none of the MEBs were activated (apparently). > I have swapped both pendants with another room (2100C #40), I have > overhauled the side panels. > > This morning our 2100CD #1164 did a similar thing with the lights and > asym/sym. > > I have never seen anything so weird with our Varian machines in my 25 > linac*years. > > I'm beginning to believe in ghosts and other spooky things. > > Any rational suggestions please........ > > :( > > > ********************************************************************** > ** This email and attachments have been scanned for content and viruses > and is believed to be clean ** > > This email or attachments may contain confidential or legally > privileged information intended for the sole use of the addressee(s). > Any use, redistribution, disclosure, or reproduction of this message, > except as intended, is prohibited. If you received this email in error, > please notify the sender and remove all copies of the message, > including any attachments. Any views or opinions expressed in this > email (unless otherwise stated) may not represent those of Canterbury > District Health Board > ********************************************************************** > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 08 18:07:20 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 192vd1-0000CT-00; Tue, 08 Apr 2003 18:07:19 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B2D291112F4; Tue, 8 Apr 2003 19:03:05 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA09409 for linac-eng-list; Tue, 8 Apr 2003 10:29:00 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from persephone.med.yale.edu (email.med.yale.edu [130.132.232.16]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA09405 for ; Tue, 8 Apr 2003 10:28:58 -0500 (CDT) Received: from yale.edu (vitalip.med.yale.edu [130.132.213.170]) by email.med.yale.edu (PMDF V6.1-1 #40995) with ESMTP id <0HD10S5PM707W9@email.med.yale.edu> for linac-eng@plato.aristotle.net; Tue, 08 Apr 2003 11:28:57 -0400 (EDT) Date: Tue, 08 Apr 2003 11:29:56 -0400 From: "Peter E. Vitali" Subject: Re: ghosts ????? To: Dave Pinchin Cc: linac-eng@plato.aristotle.net Message-id: <3E92EAB6.673069B2@yale.edu> MIME-version: 1.0 X-Mailer: Mozilla 4.75 (Macintosh; U; PPC) Content-type: text/plain; x-mac-creator=4D4F5353; x-mac-type=54455854; charset=us-ascii Content-transfer-encoding: 7bit X-Accept-Language: en,pdf References: Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 08 Apr 2003 11:29:56 -0400 From: "Peter E. Vitali" Subject: Re: ghosts ????? To: Dave Pinchin Cc: linac-eng@plato.aristotle.net X-Accept-Language: en,pdf Sender: owner-linac-eng@plato.aristotle.net Dave: 2100C 228, with VARiS 6.1.35 Let me know what you find. We had this happen last week. Collimator jaws going from symmetrical to asymmetrical with no one doing anything involving the jaws. Had the staff try to document what they were doing and what state the machine was in at the time. I asked them to verify if it did it on every patient or on only a few. Problem happened for one day only. Since that day it hasn't happened. Thought maybe it had something to do with the pendant Auto function. This uses the patient information from VARiS to set the jaws. I tried to get it to happen but being an engineer the machine will not do it for me. Peter E. Vitali, CBET Therapeutic Radiological Engineer Yale New Haven Hospital 20 York Street, HRT 22 New Haven, CT. 06504 Phone: (203) 688-2948 FAX: (203) 688-3663 E-mail: peter.vitali@yale.edu As usual, everything I say may be plausibly denied at my employer's convenience... 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 11:11:16 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193Bbw-0004dy-00; Wed, 09 Apr 2003 11:11:16 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id BE6511112F2; Wed, 9 Apr 2003 12:06:57 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id DAA15628 for linac-eng-list; Wed, 9 Apr 2003 03:41:57 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail1.nhs.uk (mail1.nhs.uk [213.120.235.81]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id DAA15619 for ; Wed, 9 Apr 2003 03:41:50 -0500 (CDT) Received: from hn-ext by mail1.nhs.uk (Sendmail 8.8.8) with esmtp id 193B8p-0006ja-00; Wed, 09 Apr 2003 09:41:11 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B6006DB6F7 for linac-eng@plato.aristotle.net; Wed, 9 Apr 2003 09:41:06 +0100 Received: from relay.wales.nhs.uk (194.189.180.1) by relay.nhs.uk (Syntegra-4 7.0.008) id 3E9138A900091096 for linac-eng@plato.aristotle.net; Wed, 9 Apr 2003 09:41:10 +0100 X-Internal-ID: 3E8BFA8C00033D2C Received: from ygc-mail.cd-tr.wales.nhs.uk (131.3.9.10) by relay.wales.nhs.uk (NPlex 2.0.108) for linac-eng@plato.aristotle.net; 9 Apr 2003 09:39:43 +0100 Received: by YGC-MAIL with Internet Mail Service (5.5.2653.19) id ; Wed, 9 Apr 2003 09:41:38 +0100 Message-ID: <4BD1673C955CD41182DA00508BACF2DF0425815B@YGC-MAIL> From: "Carfoot, Sidney" To: Linac Eng Subject: 2100c 1415 (dash 08?) Klystron flow Date: Wed, 9 Apr 2003 09:41:21 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f X-Internal-ID: 3E8BFA8C00033D2C From: "Carfoot, Sidney" To: Linac Eng Subject: 2100c 1415 (dash 08?) Klystron flow Date: Wed, 9 Apr 2003 09:41:21 +0100 Sender: owner-linac-eng@plato.aristotle.net Hi I have a problem with the Klystron 5gpm flow switch tripping. It's not the switch, which has been changed twice. There is no loss of water and no evidence of leakage into the pulse tank . If fact uses very little water. The hoses are part of the klystron assembly(?) according to the cct info. It is fed directly from supply to the klystron and then back via the flow switch to the return manifold, so nothing else in the water circuit. Pump and water pressures normal at around 66 psi. Not changed. Has anyone any idea what the actual normal flow rate is for the Klystron water circuit? Has anyone experienced problems in this area with hoses deteriorating? The machine is just over 3 years old. We have been using the chemical additives for the last eighteen months. Sid Carfoot Senior Linac Engineer Medical Physics Department Glan Clwyd Hospital 01745 445110 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 12:17:12 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193Cdk-0005kC-00; Wed, 09 Apr 2003 12:17:12 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 5BB571112F1 for ; Wed, 9 Apr 2003 13:12:56 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KUIUE7SRZ48X2VXT@med.uu.nl> for kok@radth.med.uu.nl; Wed, 9 Apr 2003 12:11:24 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUIUE1I6FW8X822T@med.uu.nl> for kok@radth.med.uu.nl; Wed, 09 Apr 2003 12:11:16 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id DAA15628 for linac-eng-list; Wed, 09 Apr 2003 03:41:57 -0500 (CDT) Received: from mail1.nhs.uk (mail1.nhs.uk [213.120.235.81]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id DAA15619 for ; Wed, 09 Apr 2003 03:41:50 -0500 (CDT) Received: from hn-ext by mail1.nhs.uk (Sendmail 8.8.8) with esmtp id 193B8p-0006ja-00; Wed, 09 Apr 2003 09:41:11 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B6006DB6F7 for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 09:41:06 +0100 Received: from relay.wales.nhs.uk (194.189.180.1) by relay.nhs.uk (Syntegra-4 7.0.008) id 3E9138A900091096 for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 09:41:10 +0100 Received: from ygc-mail.cd-tr.wales.nhs.uk (131.3.9.10) by relay.wales.nhs.uk (NPlex 2.0.108) for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 09:39:43 +0100 Received: by YGC-MAIL with Internet Mail Service (5.5.2653.19) id ; Wed, 09 Apr 2003 09:41:38 +0100 Date: Wed, 09 Apr 2003 09:41:21 +0100 From: "Carfoot, Sidney" Subject: 2100c 1415 (dash 08?) Klystron flow Sender: owner-linac-eng@plato.aristotle.net To: Linac Eng Message-id: <4BD1673C955CD41182DA00508BACF2DF0425815B@YGC-MAIL> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: text/plain Precedence: bulk X-Internal-ID: 3E8BFA8C00033D2C X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 09 Apr 2003 09:41:21 +0100 From: "Carfoot, Sidney" Subject: 2100c 1415 (dash 08?) Klystron flow Sender: owner-linac-eng@plato.aristotle.net To: Linac Eng X-Internal-ID: 3E8BFA8C00033D2C X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Hi I have a problem with the Klystron 5gpm flow switch tripping. It's not the switch, which has been changed twice. There is no loss of water and no evidence of leakage into the pulse tank . If fact uses very little water. The hoses are part of the klystron assembly(?) according to the cct info. It is fed directly from supply to the klystron and then back via the flow switch to the return manifold, so nothing else in the water circuit. Pump and water pressures normal at around 66 psi. Not changed. Has anyone any idea what the actual normal flow rate is for the Klystron water circuit? Has anyone experienced problems in this area with hoses deteriorating? The machine is just over 3 years old. We have been using the chemical additives for the last eighteen months. Sid Carfoot Senior Linac Engineer Medical Physics Department Glan Clwyd Hospital 01745 445110 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 12:42:38 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193D2M-00065z-00; Wed, 09 Apr 2003 12:42:38 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 20BC21112F1 for ; Wed, 9 Apr 2003 13:38:22 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KUIV9P5AKW8X3MGU@med.uu.nl> for kok@radth.med.uu.nl; Wed, 9 Apr 2003 12:36:47 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUIV9JOG6I8X86PY@med.uu.nl> for kok@radth.med.uu.nl; Wed, 09 Apr 2003 12:36:40 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id DAA15128 for linac-eng-list; Wed, 09 Apr 2003 03:30:09 -0500 (CDT) Received: from mail9.nhs.uk (mail9.nhs.uk [213.120.235.87]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id DAA15115 for ; Wed, 09 Apr 2003 03:30:03 -0500 (CDT) Received: from [194.62.42.123] (helo=relayint1.nhs.uk) by mail9.nhs.uk with esmtp (Exim 4.10) id 193AxW-0006KO-00 for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 09:29:30 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E607712006600C1 for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 09:29:30 +0100 Received: from relay.wales.nhs.uk (194.189.180.1) by relay.nhs.uk (Syntegra-4 7.0.008) id 3E9138A90008FCDC for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 09:29:30 +0100 Received: from theta.velindre-tr.wales.nhs.uk (137.11.128.23) by relay.wales.nhs.uk (NPlex 2.0.108) for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 09:28:03 +0100 Received: by THETA with Internet Mail Service (5.5.2653.19) id ; Wed, 09 Apr 2003 09:31:29 +0100 Date: Wed, 09 Apr 2003 09:31:27 +0100 From: Stephen Hayes Subject: Re: ghosts ????? Sender: owner-linac-eng@plato.aristotle.net To: "'linac-eng@plato.aristotle.net'" Message-id: MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: text/plain; charset="iso-8859-1" Precedence: bulk X-Internal-ID: 3E8BFA8C000339C4 X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 09 Apr 2003 09:31:27 +0100 From: Stephen Hayes Subject: Re: ghosts ????? Sender: owner-linac-eng@plato.aristotle.net To: "'linac-eng@plato.aristotle.net'" X-Internal-ID: 3E8BFA8C000339C4 X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f We had a similar thing happen with our 12 yr old 2100C a few months ago. It came about gradually with the room lights lasers etc turning off or on with beam off. Then it got to the point of everything moving back and forth, collimator rotation and couch rotation, lat and longitude for no apparrent reason while we held the enable bars on the pendant or couch. It seemed to clear when we switched the Linac off and on and rebooted the console but the problem came back after a few minutes which led us to believe it was a noise problem. We changed the SCI card in the STD bus and checked the wiring for the couch panel and pendant connection on the left hand side of the couch as this seemed to be the problematic side. However nothing was conclusive and the problem went away by itself. Steve Hayes Velindre NHS Trust Cardiff Wales 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 13:44:18 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193E02-0007ND-00; Wed, 09 Apr 2003 13:44:18 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 24AF31112F1; Wed, 9 Apr 2003 14:40:01 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id GAA20264 for linac-eng-list; Wed, 9 Apr 2003 06:17:26 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id GAA20260 for ; Wed, 9 Apr 2003 06:17:24 -0500 (CDT) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Wed, 09 Apr 2003 08:15:47 -0300 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Date: Wed, 09 Apr 2003 08:15:37 -0300 From: "Scott Purcell" To: , Subject: Re: 2100c 1415 (dash 08?) Klystron flow Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id GAA20261 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 09 Apr 2003 08:15:37 -0300 From: "Scott Purcell" To: , Subject: Re: 2100c 1415 (dash 08?) Klystron flow Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id GAA20261 Sender: owner-linac-eng@plato.aristotle.net Hi Sidney, I would think about looking at the hoses going to and from the Kly. At our site we have had hoses swell to the point we only a trickle could pass through them. Just an idea. Cheers Scott Scott Purcell, C.E.T Linear Accelerator Service Technologist Department of Medical Physics Nova Scotia Cancer Centre 5820 University Avenue Halifax, Nova Scotia Canada Email scott.purcell@cdha.nshealth.ca Phone: 902-473-2563 Fax: 902-473-6120 >>> "Carfoot, Sidney" 04/09/03 05:41AM >>> Hi I have a problem with the Klystron 5gpm flow switch tripping. It's not the switch, which has been changed twice. There is no loss of water and no evidence of leakage into the pulse tank . If fact uses very little water. The hoses are part of the klystron assembly(?) according to the cct info. It is fed directly from supply to the klystron and then back via the flow switch to the return manifold, so nothing else in the water circuit. Pump and water pressures normal at around 66 psi. Not changed. Has anyone any idea what the actual normal flow rate is for the Klystron water circuit? Has anyone experienced problems in this area with hoses deteriorating? The machine is just over 3 years old. We have been using the chemical additives for the last eighteen months. Sid Carfoot Senior Linac Engineer Medical Physics Department Glan Clwyd Hospital 01745 445110 This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 15:31:49 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193Fg5-0000J8-00; Wed, 09 Apr 2003 15:31:49 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 4FAE81112F1 for ; Wed, 9 Apr 2003 16:27:31 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KUJ0UANJF48X8F0U@med.uu.nl> for kok@radth.med.uu.nl; Wed, 9 Apr 2003 15:20:39 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUJ0S3E6V08Y0LZ5@med.uu.nl> for kok@radth.med.uu.nl; Wed, 09 Apr 2003 15:14:24 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id GAA20264 for linac-eng-list; Wed, 09 Apr 2003 06:17:26 -0500 (CDT) Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id GAA20260 for ; Wed, 09 Apr 2003 06:17:24 -0500 (CDT) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Wed, 09 Apr 2003 08:15:47 -0300 Date: Wed, 09 Apr 2003 08:15:37 -0300 From: Scott Purcell Subject: Re: 2100c 1415 (dash 08?) Klystron flow Sender: owner-linac-eng@plato.aristotle.net To: Sidney.Carfoot@cd-tr.wales.nhs.uk, linac-eng@plato.aristotle.net Message-id: MIME-version: 1.0 X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id GAA20261 X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Content-type: text/plain; charset=US-ASCII Content-disposition: inline Content-transfer-encoding: 8bit Precedence: bulk X-Guinevere: 1.1.14 ; Nova Scotia Hospital X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 09 Apr 2003 08:15:37 -0300 From: Scott Purcell Subject: Re: 2100c 1415 (dash 08?) Klystron flow Sender: owner-linac-eng@plato.aristotle.net To: Sidney.Carfoot@cd-tr.wales.nhs.uk, linac-eng@plato.aristotle.net X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id GAA20261 Content-disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Hi Sidney, I would think about looking at the hoses going to and from the Kly. At our site we have had hoses swell to the point we only a trickle could pass through them. Just an idea. Cheers Scott Scott Purcell, C.E.T Linear Accelerator Service Technologist Department of Medical Physics Nova Scotia Cancer Centre 5820 University Avenue Halifax, Nova Scotia Canada Email scott.purcell@cdha.nshealth.ca Phone: 902-473-2563 Fax: 902-473-6120 >>> "Carfoot, Sidney" 04/09/03 05:41AM >>> Hi I have a problem with the Klystron 5gpm flow switch tripping. It's not the switch, which has been changed twice. There is no loss of water and no evidence of leakage into the pulse tank . If fact uses very little water. The hoses are part of the klystron assembly(?) according to the cct info. It is fed directly from supply to the klystron and then back via the flow switch to the return manifold, so nothing else in the water circuit. Pump and water pressures normal at around 66 psi. Not changed. Has anyone any idea what the actual normal flow rate is for the Klystron water circuit? Has anyone experienced problems in this area with hoses deteriorating? The machine is just over 3 years old. We have been using the chemical additives for the last eighteen months. Sid Carfoot Senior Linac Engineer Medical Physics Department Glan Clwyd Hospital 01745 445110 This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 15:43:08 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193Fr2-0000Sl-00; Wed, 09 Apr 2003 15:43:08 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 1BD5F1112F1; Wed, 9 Apr 2003 16:38:48 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA22052 for linac-eng-list; Wed, 9 Apr 2003 08:11:29 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail2.vcu.edu (mail2.vcu.edu [128.172.1.135]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA22048 for ; Wed, 9 Apr 2003 08:11:27 -0500 (CDT) Received: from hsc.vcu.edu ([208.31.209.254]) by mail2.vcu.edu (8.12.0/8.11.3) with ESMTP id h39DBJIW056226; Wed, 9 Apr 2003 09:11:19 -0400 Message-ID: <3E941C19.3000203@hsc.vcu.edu> Date: Wed, 09 Apr 2003 09:11:53 -0400 From: "Christopher L. Bartee" User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.2.1) Gecko/20021130 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Carfoot, Sidney" Cc: Linac Eng Subject: Re: 2100c 1415 (dash 08?) Klystron flow References: <4BD1673C955CD41182DA00508BACF2DF0425815B@YGC-MAIL> In-Reply-To: <4BD1673C955CD41182DA00508BACF2DF0425815B@YGC-MAIL> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 09 Apr 2003 09:11:53 -0400 From: "Christopher L. Bartee" X-Accept-Language: en-us, en To: "Carfoot, Sidney" Cc: Linac Eng Subject: Re: 2100c 1415 (dash 08?) Klystron flow In-Reply-To: <4BD1673C955CD41182DA00508BACF2DF0425815B@YGC-MAIL> Sender: owner-linac-eng@plato.aristotle.net There was a mod for the problem you are experiencing. I had to have it done on s/n 1426. Call varian. I think they just replace the flow switch. Just a thought Chris Bartee Carfoot, Sidney wrote: >Hi > >I have a problem with the Klystron 5gpm flow switch tripping. It's not the >switch, which has been changed twice. There is no loss of water and no >evidence of leakage into the pulse tank . If fact uses very little water. > >The hoses are part of the klystron assembly(?) according to the cct info. It >is fed directly from supply to the klystron and then back via the flow >switch to the return manifold, so nothing else in the water circuit. > >Pump and water pressures normal at around 66 psi. Not changed. > >Has anyone any idea what the actual normal flow rate is for the Klystron >water circuit? > >Has anyone experienced problems in this area with hoses deteriorating? >The machine is just over 3 years old. >We have been using the chemical additives for the last eighteen months. > > > >Sid Carfoot >Senior Linac Engineer >Medical Physics Department >Glan Clwyd Hospital >01745 445110 > > > > > 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 16:20:18 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193GR0-000151-00; Wed, 09 Apr 2003 16:20:18 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 16DDF1112F1; Wed, 9 Apr 2003 17:15:59 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA22872 for linac-eng-list; Wed, 9 Apr 2003 08:47:30 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from UIHC-MXII.UIHC.UIOWA.EDU (uihc-mxii.uihc.uiowa.edu [129.255.210.177]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA22868 for ; Wed, 9 Apr 2003 08:47:28 -0500 (CDT) Received: from uihc-mail.uihc.uiowa.edu (uihc-mail.uihc.uiowa.edu [129.255.242.85]) by UIHC-MXII.UIHC.UIOWA.EDU (8.11.6/8.11.2) with ESMTP id h39DPlu24282 for ; Wed, 9 Apr 2003 08:25:47 -0500 Received: by uihc-mail.uihc.uiowa.edu with Internet Mail Service (5.5.2653.19) id ; Wed, 9 Apr 2003 08:47:10 -0500 Message-ID: From: "Schebler, Joe" To: "'Linac-Eng@plato.aristotle.net'" Subject: Ghost stories Date: Wed, 9 Apr 2003 08:47:09 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Schebler, Joe" To: "'Linac-Eng@plato.aristotle.net'" Subject: Ghost stories Date: Wed, 9 Apr 2003 08:47:09 -0500 Sender: owner-linac-eng@plato.aristotle.net These are getting really good reminds me of the the old Art Bell show , keep em coming! Joe 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 16:53:24 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193Gx1-0001XN-00; Wed, 09 Apr 2003 16:53:23 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B40F11112F1; Wed, 9 Apr 2003 17:49:04 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA23660 for linac-eng-list; Wed, 9 Apr 2003 09:27:13 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail3.nhs.uk (mail3.nhs.uk [194.72.23.240]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA23655 for ; Wed, 9 Apr 2003 09:27:11 -0500 (CDT) Received: from hn-ext by mail3.nhs.uk (Sendmail 8.8.8) with esmtp id 193GXd-0007VY-00; Wed, 09 Apr 2003 15:27:09 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B6006F9C1D for linac-eng@plato.aristotle.net; Wed, 9 Apr 2003 15:27:04 +0100 Received: from carrot.ruh-bath.nhs.uk (194.189.240.90) by relay.nhs.uk (Syntegra-4 7.0.008) (authenticated as smtp-in_ruh-bath_swest_nhs_uk@es2002.nhs.uk) id 3E9138A9000B59A4 for linac-eng@plato.aristotle.net; Wed, 9 Apr 2003 15:27:09 +0100 Received: by carrot.ruh-bath.swest.nhs.uk with Internet Mail Service (5.5.2653.19) id <2CQ1632L>; Wed, 9 Apr 2003 15:27:08 +0100 Message-ID: <1F3B1695594CBE4EA34A153F14F31FDD1ADAE8@carrot.ruh-bath.swest.nhs.uk> From: "Amesbury, Ross" To: linac-eng@plato.aristotle.net Subject: Varian 6/100 Date: Wed, 9 Apr 2003 15:27:06 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Amesbury, Ross" To: linac-eng@plato.aristotle.net Subject: Varian 6/100 Date: Wed, 9 Apr 2003 15:27:06 +0100 Sender: owner-linac-eng@plato.aristotle.net Hi All I have for disposal a complete set of PCB's and various assorted parts for early Varian 6/100. Many items are new and unused but I am unable to guarantee present condition. If any one would like the spares let me know. I must give NHS hospitals first refusal. I will be unable to meet any transport costs. Regards Ross Amesbury Royal United Hospital Bath 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 18:01:27 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193I0t-00023J-00; Wed, 09 Apr 2003 18:01:27 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id D6FD91112F3; Wed, 9 Apr 2003 18:57:08 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA25347 for linac-eng-list; Wed, 9 Apr 2003 10:31:47 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail2.vcu.edu (mail2.vcu.edu [128.172.1.135]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA25343 for ; Wed, 9 Apr 2003 10:31:42 -0500 (CDT) Received: from hsc.vcu.edu ([205.245.94.109]) by mail2.vcu.edu (8.12.0/8.11.3) with ESMTP id h39FVbIW124848 for ; Wed, 9 Apr 2003 11:31:37 -0400 Message-ID: <3E943CFB.9040206@hsc.vcu.edu> Date: Wed, 09 Apr 2003 11:32:11 -0400 From: "Christopher L. Bartee" User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.2.1) Gecko/20021130 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linac-eng Subject: ghost Stories, Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 09 Apr 2003 11:32:11 -0400 From: "Christopher L. Bartee" X-Accept-Language: en-us, en To: linac-eng Subject: ghost Stories, Sender: owner-linac-eng@plato.aristotle.net Here's a good one for you. I had a 2100C and the problem was whenever the customer would pick up the pendant every now and then they would trip a VAC1 fault. After t/s I found that on the console interconnect the pcb trace for the pendant intlk ran next to the Vac1 trace. Somehow it arcd over and went resistive. Once I took a knife and cut between to separate the traces the problem went away. Just a thought, Chris Bartee 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 18:17:40 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193IGa-00025Q-00; Wed, 09 Apr 2003 18:17:40 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id E5B241112F4 for ; Wed, 9 Apr 2003 19:13:22 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KUJ6Z3C2KG8X64BZ@med.uu.nl> for kok@radth.med.uu.nl; Wed, 9 Apr 2003 18:11:50 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUJ6YWVESE8X61K2@med.uu.nl> for kok@radth.med.uu.nl; Wed, 09 Apr 2003 18:11:41 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA23660 for linac-eng-list; Wed, 09 Apr 2003 09:27:13 -0500 (CDT) Received: from mail3.nhs.uk (mail3.nhs.uk [194.72.23.240]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA23655 for ; Wed, 09 Apr 2003 09:27:11 -0500 (CDT) Received: from hn-ext by mail3.nhs.uk (Sendmail 8.8.8) with esmtp id 193GXd-0007VY-00; Wed, 09 Apr 2003 15:27:09 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B6006F9C1D for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 15:27:04 +0100 Received: from carrot.ruh-bath.nhs.uk (194.189.240.90) by relay.nhs.uk (Syntegra-4 7.0.008) (authenticated as smtp-in_ruh-bath_swest_nhs_uk@es2002.nhs.uk) id 3E9138A9000B59A4 for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 15:27:09 +0100 Received: by carrot.ruh-bath.swest.nhs.uk with Internet Mail Service (5.5.2653.19) id <2CQ1632L>; Wed, 09 Apr 2003 15:27:08 +0100 Date: Wed, 09 Apr 2003 15:27:06 +0100 From: "Amesbury, Ross" Subject: Varian 6/100 Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net Message-id: <1F3B1695594CBE4EA34A153F14F31FDD1ADAE8@carrot.ruh-bath.swest.nhs.uk> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: text/plain; charset="iso-8859-1" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 09 Apr 2003 15:27:06 +0100 From: "Amesbury, Ross" Subject: Varian 6/100 Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Hi All I have for disposal a complete set of PCB's and various assorted parts for early Varian 6/100. Many items are new and unused but I am unable to guarantee present condition. If any one would like the spares let me know. I must give NHS hospitals first refusal. I will be unable to meet any transport costs. Regards Ross Amesbury Royal United Hospital Bath 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 19:41:58 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193JaA-0002DU-00; Wed, 09 Apr 2003 19:41:58 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0C0A81112F5; Wed, 9 Apr 2003 20:37:39 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA27092 for linac-eng-list; Wed, 9 Apr 2003 12:04:46 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-m06.mx.aol.com (imo-m06.mx.aol.com [64.12.136.161]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA27088 for ; Wed, 9 Apr 2003 12:04:45 -0500 (CDT) From: Mlaa@aol.com Received: from Mlaa@aol.com by imo-m06.mx.aol.com (mail_out_v34.21.) id y.12b.275ec42f (3964) for ; Wed, 9 Apr 2003 13:04:12 -0400 (EDT) Message-ID: <12b.275ec42f.2bc5ac8b@aol.com> Date: Wed, 9 Apr 2003 13:04:11 EDT Subject: Picker Zephyer To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_12b.275ec42f.2bc5ac8b_boundary" X-Mailer: 7.0 for Windows sub 10629 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Mlaa@aol.com Date: Wed, 9 Apr 2003 13:04:11 EDT Subject: Picker Zephyer To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_12b.275ec42f.2bc5ac8b_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hello to all, Does anyone have a Picker Zephyer superficial tube in working order that they would like to sell, or know of someone who could re-seal or rebuild? Thanks in advance for any help Mike Liddicote Accelerator Associates --part1_12b.275ec42f.2bc5ac8b_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hello to all,
Does anyone have a Picker Zephyer super= ficial tube in working order that they would like to sell, or know of someon= e who could re-seal or rebuild? Thanks in advance for any help
Mike Liddicote
Accelerator Associates --part1_12b.275ec42f.2bc5ac8b_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 20:12:36 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193K3o-0002JM-00; Wed, 09 Apr 2003 20:12:36 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A57181112F5; Wed, 9 Apr 2003 21:08:17 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA27706 for linac-eng-list; Wed, 9 Apr 2003 12:42:59 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from persephone.med.yale.edu (email.med.yale.edu [130.132.232.16]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA27702 for ; Wed, 9 Apr 2003 12:42:58 -0500 (CDT) Received: from yale.edu (vitalip.med.yale.edu [130.132.213.170]) by email.med.yale.edu (PMDF V6.1-1 #40995) with ESMTP id <0HD30QFKE7VJK7@email.med.yale.edu> for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 13:42:56 -0400 (EDT) Date: Wed, 09 Apr 2003 13:43:59 -0400 From: "Peter E. Vitali" Subject: Gantry Motor 2100C C2 To: "Linac-Engineers, Listserver" Message-id: <3E945B9E.815E54CD@yale.edu> MIME-version: 1.0 X-Mailer: Mozilla 4.75 (Macintosh; U; PPC) Content-type: text/plain; x-mac-creator=4D4F5353; x-mac-type=54455854; charset=us-ascii Content-transfer-encoding: 7bit X-Accept-Language: en,pdf Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 09 Apr 2003 13:43:59 -0400 From: "Peter E. Vitali" Subject: Gantry Motor 2100C C2 To: "Linac-Engineers, Listserver" X-Accept-Language: en,pdf Sender: owner-linac-eng@plato.aristotle.net Good Afternoon All: Does anyone have full instruction on how to adjust the Aero-Tech Modules for the Gantry and Couch lift Motors. I have some instruction but they do not seem complete. Basically I know you adjust the Tach Pot to change the speed but there are other pots and test point which I do not have good instructions on how to set. Thanks in advance Peter E. Vitali, CBET Therapeutic Radiological Engineer Yale New Haven Hospital 20 York Street, HRT 22 New Haven, CT. 06504 Phone: (203) 688-2948 FAX: (203) 688-3663 E-mail: peter.vitali@yale.edu As usual, everything I say may be plausibly denied at my employer's convenience... 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 20:14:18 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193K5S-0002Jb-00; Wed, 09 Apr 2003 20:14:18 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id D3DD61112F5; Wed, 9 Apr 2003 21:09:59 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA27807 for linac-eng-list; Wed, 9 Apr 2003 12:47:41 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from persephone.med.yale.edu (email.med.yale.edu [130.132.232.16]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA27801 for ; Wed, 9 Apr 2003 12:47:39 -0500 (CDT) Received: from yale.edu (vitalip.med.yale.edu [130.132.213.170]) by email.med.yale.edu (PMDF V6.1-1 #40995) with ESMTP id <0HD30SQBD83C00@email.med.yale.edu> for linac-eng@plato.aristotle.net; Wed, 09 Apr 2003 13:47:38 -0400 (EDT) Date: Wed, 09 Apr 2003 13:48:41 -0400 From: "Peter E. Vitali" Subject: 2nd Message 2100C C2 To: "Linac-Engineers, Listserver" Message-id: <3E945CB7.3CA61B18@yale.edu> MIME-version: 1.0 X-Mailer: Mozilla 4.75 (Macintosh; U; PPC) Content-type: text/plain; x-mac-creator=4D4F5353; x-mac-type=54455854; charset=us-ascii Content-transfer-encoding: 7bit X-Accept-Language: en,pdf Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 09 Apr 2003 13:48:41 -0400 From: "Peter E. Vitali" Subject: 2nd Message 2100C C2 To: "Linac-Engineers, Listserver" X-Accept-Language: en,pdf Sender: owner-linac-eng@plato.aristotle.net Sorry: I forgot to mention: It for a 2100C and 2100C/D C2 versions. I do have instruction for the new replacement modules but not for the older Aero-Tech Amplifiesrs Modules Thanks Pete Vitali 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 09 22:56:32 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193McS-0002WR-00; Wed, 09 Apr 2003 22:56:32 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8B0281112FC; Wed, 9 Apr 2003 23:52:11 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id PAA02446 for linac-eng-list; Wed, 9 Apr 2003 15:24:47 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA02440 for ; Wed, 9 Apr 2003 15:24:45 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h39KOc24000962 for ; Thu, 10 Apr 2003 08:24:38 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Thu, 10 Apr 2003 10:19:05 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Thu, 10 Apr 2003 08:24:12 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Thu, 10 Apr 2003 08:24:08 +1200 From: "Dave Pinchin" To: , Subject: Re: 2100c 1415 (dash 08?) Klystron flow Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 10 Apr 2003 08:24:08 +1200 From: "Dave Pinchin" To: , Subject: Re: 2100c 1415 (dash 08?) Klystron flow Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, We had a problem when our machine was relativly new (#40) where one of the sizes of rubber pipe was of a different type to the rest of the machine. (I think it was the one to the sled) and it perished on the inside. You may have enough slac pipe to shorten it by 50mm, open up the offcut to inspect the inside. We also have had issues with flow switches. They are just reed switches and can go high contact resistance (replace if greater than 0.3 Ohm). We also had problems with a flow restrictor but I think that was in the sled cct too. Good luck.... Dave >>> "Carfoot, Sidney" 9/04/03 20:41:21 >>> Hi I have a problem with the Klystron 5gpm flow switch tripping. It's not the switch, which has been changed twice. There is no loss of water and no evidence of leakage into the pulse tank . If fact uses very little water. The hoses are part of the klystron assembly(?) according to the cct info. It is fed directly from supply to the klystron and then back via the flow switch to the return manifold, so nothing else in the water circuit. Pump and water pressures normal at around 66 psi. Not changed. Has anyone any idea what the actual normal flow rate is for the Klystron water circuit? Has anyone experienced problems in this area with hoses deteriorating? The machine is just over 3 years old. We have been using the chemical additives for the last eighteen months. Sid Carfoot Senior Linac Engineer Medical Physics Department Glan Clwyd Hospital 01745 445110 ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 10 02:03:22 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193PXG-0002jV-00; Thu, 10 Apr 2003 02:03:22 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 4260B11130C; Thu, 10 Apr 2003 02:59:02 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id SAA07526 for linac-eng-list; Wed, 9 Apr 2003 18:26:30 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from adl0133.systems.sa.gov.au (adl0133.systems.sa.gov.au [143.216.236.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id SAA07521 for ; Wed, 9 Apr 2003 18:26:27 -0500 (CDT) Received: from adl0133.systems.sa.gov.au (localhost [127.0.0.1]) by adl0133.systems.sa.gov.au OUTGOING (8.12.9/8.12.7) with ESMTP id h39NPsV6005607 for ; Thu, 10 Apr 2003 08:55:54 +0930 (CST)' Received: from rahsun153.rah.sa.gov.au (mailhub.rah.sa.gov.au [10.19.241.188]) by adl0133.systems.sa.gov.au INCOMING (8.12.9/8.12.7) with ESMTP id h39NPssN005596 for ; Thu, 10 Apr 2003 08:55:54 +0930 (CST)' Received: from mail.rah.sa.gov.au (sagraha01 [10.19.241.136]) by rahsun153.rah.sa.gov.au (8.12.9/8.12.8) with ESMTP id h39NPqcV011236 for ; Thu, 10 Apr 2003 08:55:53 +0930 (CST) Message-Id: <200304092325.h39NPqcV011236@rahsun153.rah.sa.gov.au> Received: from SAGRAHA01/SpoolDir by mail.rah.sa.gov.au (Mercury 1.48); 10 Apr 03 08:55:53 +0930 Received: from SpoolDir by SAGRAHA01 (Mercury 1.48); 10 Apr 03 08:55:43 +0930 From: "Andrew Frolov" Organization: Royal Adelaide Hospital To: linac-eng@plato.aristotle.net Date: Thu, 10 Apr 2003 08:55:08 +0930 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: Re: 2100c 1415 (dash 08?) Klystron flow In-reply-to: <4BD1673C955CD41182DA00508BACF2DF0425815B@YGC-MAIL> X-mailer: Pegasus Mail for Win32 (v3.12a) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Andrew Frolov" Organization: Royal Adelaide Hospital To: linac-eng@plato.aristotle.net Date: Thu, 10 Apr 2003 08:55:08 +0930 Subject: Re: 2100c 1415 (dash 08?) Klystron flow In-reply-to: <4BD1673C955CD41182DA00508BACF2DF0425815B@YGC-MAIL> Sender: owner-linac-eng@plato.aristotle.net Hi, We are currently experiencing exactly the same problem. It started as an intermittent FLOW interlock that gradually became very persistent. The interlock was tripped by the klystron flow switch. We reversed flush the circuit with no result. Currently we have a 3gpm switch installed. The actual flow is between 3.7 and 4.2 gpm and we are monitoring it for any sign of deterioration. We contacted Varian on this matter but have not got any reasonable explanation. The hoses appear to be OK. The machine is also 3 yo, serial # 1350. Regards, From: "Carfoot, Sidney" To: Linac Eng Subject: 2100c 1415 (dash 08?) Klystron flow Date sent: Wed, 9 Apr 2003 09:41:21 +0100 > > Hi > > I have a problem with the Klystron 5gpm flow switch tripping. It's not the > switch, which has been changed twice. There is no loss of water and no > evidence of leakage into the pulse tank . If fact uses very little water. > > The hoses are part of the klystron assembly(?) according to the cct info. It > is fed directly from supply to the klystron and then back via the flow > switch to the return manifold, so nothing else in the water circuit. > > Pump and water pressures normal at around 66 psi. Not changed. > > Has anyone any idea what the actual normal flow rate is for the Klystron > water circuit? > > Has anyone experienced problems in this area with hoses deteriorating? > The machine is just over 3 years old. > We have been using the chemical additives for the last eighteen months. > > > > Sid Carfoot > Senior Linac Engineer > Medical Physics Department > Glan Clwyd Hospital > 01745 445110 > Andrew Frolov Manager, Radiation Engineering Medical Physics Royal Adelaide Hospital Tel: 61 8 8222 5674 Fax: 61 8 8222 5937 email afrolov@mail.rah.sa.gov.au 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 10 15:32:16 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193cA4-0000m2-00; Thu, 10 Apr 2003 15:32:16 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id C8C7D1105F6; Thu, 10 Apr 2003 16:27:47 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA09993 for linac-eng-list; Thu, 10 Apr 2003 07:48:13 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from UIHC-MXII.UIHC.UIOWA.EDU (uihc-mxii.uihc.uiowa.edu [129.255.210.177]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA09989 for ; Thu, 10 Apr 2003 07:48:11 -0500 (CDT) Received: from uihc-mail.uihc.uiowa.edu (uihc-mail.uihc.uiowa.edu [129.255.242.84]) by UIHC-MXII.UIHC.UIOWA.EDU (8.11.6/8.11.2) with ESMTP id h3ACQVu19573 for ; Thu, 10 Apr 2003 07:26:31 -0500 Received: by uihc-mail.uihc.uiowa.edu with Internet Mail Service (5.5.2653.19) id ; Thu, 10 Apr 2003 07:47:57 -0500 Message-ID: From: "Schebler, Joe" To: "'Linac-Eng@plato.aristotle.net'" Subject: dash 08 Date: Thu, 10 Apr 2003 07:47:55 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Schebler, Joe" To: "'Linac-Eng@plato.aristotle.net'" Subject: dash 08 Date: Thu, 10 Apr 2003 07:47:55 -0500 Sender: owner-linac-eng@plato.aristotle.net I'm with Andrew F on that, it surprised me to hear of a 5GPM switch in that circuit, are we absolutely sure a 5GPM belongs there? Joe S 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 10 17:11:17 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193dht-0001i0-00; Thu, 10 Apr 2003 17:11:17 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id DC0971105FC; Thu, 10 Apr 2003 18:06:51 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA11877 for linac-eng-list; Thu, 10 Apr 2003 09:39:53 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from [208.130.187.254] (gatekeeper.mercycare.org [208.130.187.254]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id JAA11873 for ; Thu, 10 Apr 2003 09:39:51 -0500 (CDT) Received: from mercy-e1.mercycare.org by [208.130.187.254] via smtpd (for [206.66.224.2]) with SMTP; Thu, 10 Apr 2003 09:39:51 -0500 Received: by Mercy-E1.mercycare.org with Internet Mail Service (5.5.2653.19) id <2RJXR0JY>; Thu, 10 Apr 2003 09:39:50 -0500 Message-ID: From: Tyson Long To: "List Server (E-mail 2)" Subject: RE: dash 08 Date: Thu, 10 Apr 2003 09:39:43 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Tyson Long To: "List Server (E-mail 2)" Subject: RE: dash 08 Date: Thu, 10 Apr 2003 09:39:43 -0500 Sender: owner-linac-eng@plato.aristotle.net We have a 5GPM in our 21EX #1328. Have not had a problem with it in its 3 year life. Tyson Long Biomedical Equipment Specialist Mercy Medical Center Cedar Rapids, IA 52402 319-369-4532 -----Original Message----- From: Schebler, Joe [mailto:joe-schebler@uiowa.edu] Sent: Thursday, April 10, 2003 7:48 AM To: 'Linac-Eng@plato.aristotle.net' Subject: dash 08 I'm with Andrew F on that, it surprised me to hear of a 5GPM switch in that circuit, are we absolutely sure a 5GPM belongs there? Joe S 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 11 02:09:48 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193m72-0002ik-00; Fri, 11 Apr 2003 02:09:48 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 6B493110606; Fri, 11 Apr 2003 03:05:22 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id SAA23768 for linac-eng-list; Thu, 10 Apr 2003 18:25:30 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from adl0133.systems.sa.gov.au (adl0133.systems.sa.gov.au [143.216.236.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id SAA23764 for ; Thu, 10 Apr 2003 18:25:28 -0500 (CDT) Received: from adl0133.systems.sa.gov.au (localhost [127.0.0.1]) by adl0133.systems.sa.gov.au OUTGOING (8.12.9/8.12.7) with ESMTP id h3ANOtV6003426 for ; Fri, 11 Apr 2003 08:54:55 +0930 (CST)' Received: from rahsun153.rah.sa.gov.au (mailhub.rah.sa.gov.au [10.19.241.188]) by adl0133.systems.sa.gov.au INCOMING (8.12.9/8.12.7) with ESMTP id h3ANOtsN003423 for ; Fri, 11 Apr 2003 08:54:55 +0930 (CST)' Received: from mail.rah.sa.gov.au (sagraha01 [10.19.241.136]) by rahsun153.rah.sa.gov.au (8.12.9/8.12.8) with ESMTP id h3ANOscP007617 for ; Fri, 11 Apr 2003 08:54:54 +0930 (CST) Message-Id: <200304102324.h3ANOscP007617@rahsun153.rah.sa.gov.au> Received: from SAGRAHA01/SpoolDir by mail.rah.sa.gov.au (Mercury 1.48); 11 Apr 03 08:54:55 +0930 Received: from SpoolDir by SAGRAHA01 (Mercury 1.48); 11 Apr 03 08:54:26 +0930 From: "Andrew Frolov" Organization: Royal Adelaide Hospital To: linac-eng@plato.aristotle.net Date: Fri, 11 Apr 2003 08:53:44 +0930 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: RE: 2100c 1415 (dash 08?) Klystron flow In-reply-to: X-mailer: Pegasus Mail for Win32 (v3.12a) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Andrew Frolov" Organization: Royal Adelaide Hospital To: linac-eng@plato.aristotle.net Date: Fri, 11 Apr 2003 08:53:44 +0930 Subject: RE: 2100c 1415 (dash 08?) Klystron flow In-reply-to: Sender: owner-linac-eng@plato.aristotle.net Guy Turner wrote: > Do you or did you have a Culligan demineralizer system on your machine? No, it was remove and modified with hi-flow filter. Though we do not use chemicals. > Pick one or two hoses in the Kly water flow path that are easy to replace. > Cut them open and inspect the inner surface of the hose. Done that but on different circuit. The hose inside appears to be in the perfect condition. Varian suggested that hoses on the klystron are factory assembled and can not be replaced in the field. Is it true? Joe S wrote: >I'm with Andrew F on that, it surprised me to hear of a 5GPM switch in that >circuit, are we absolutely sure a 5GPM belongs there? May be I have not made it clear but originally it was 5GPM switch which we replaced with 3GPM one to keep the machine running. I thought it is safer than overriding the switch altogether. Thank you for your comments. I will continue monitoring the flow and advise everybody on the development. Cheers, Andrew Frolov Manager, Radiation Engineering Medical Physics Royal Adelaide Hospital Tel: 61 8 8222 5674 Fax: 61 8 8222 5937 email afrolov@mail.rah.sa.gov.au 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 11 02:28:50 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193mPR-0002ja-00; Fri, 11 Apr 2003 02:28:49 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 230E1110608; Fri, 11 Apr 2003 03:24:24 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id SAA24296 for linac-eng-list; Thu, 10 Apr 2003 18:56:36 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from orcus.cancerboard.ab.ca (cancerserver.cancerboard.ab.ca [164.102.1.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id SAA24292 for ; Thu, 10 Apr 2003 18:56:32 -0500 (CDT) Received: from kurma.cancerboard.ab.ca (ccimail.cancerboard.ab.ca [164.102.152.198]) by orcus.cancerboard.ab.ca (8.11.6+Sun/8.10.2) with ESMTP id h3ANvmt26251; Thu, 10 Apr 2003 17:57:48 -0600 (MDT) Received: from cancerboard.ab.ca ([164.102.250.127]) by kurma.cancerboard.ab.ca (Switch-2.2.1/Switch-2.2.0) with ESMTP id h3ANufx22727; Thu, 10 Apr 2003 17:56:41 -0600 (MDT) Message-ID: <3E960611.BF5DB43C@cancerboard.ab.ca> Date: Thu, 10 Apr 2003 18:02:25 -0600 From: Len Johnson X-Mailer: Mozilla 4.7 [en] (Win95; I) X-Accept-Language: en MIME-Version: 1.0 To: "Carfoot, Sidney" , Linac Eng Subject: Klystron 5GPM flow switch Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 10 Apr 2003 18:02:25 -0600 From: Len Johnson X-Accept-Language: en To: "Carfoot, Sidney" , Linac Eng Subject: Klystron 5GPM flow switch Sender: owner-linac-eng@plato.aristotle.net Sidney, Our Clinac also has the klystron piped in from the supply header and returning through the flow switch to the return header. There is also a Hayes flow restrictor rated at 7GPM ahead of the flow switch. This flow restrictor has a rubber washer with a very small hole through it to limit the flow. If your system has one of these it is possible that the small hole has become partially blocked and is limiting the flow. The Varian drawing that seems to best show all of this is 876072 rev J. Good luck. Len 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 11 07:53:23 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193rTX-0003Gv-00; Fri, 11 Apr 2003 07:53:23 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0A337110608 for ; Fri, 11 Apr 2003 08:48:58 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KULDBOR5ZK8XZ9Y4@med.uu.nl> for kok@radth.med.uu.nl; Fri, 11 Apr 2003 07:41:59 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUL4ZB3DQS8X3VVF@med.uu.nl> for kok@radth.med.uu.nl; Fri, 11 Apr 2003 03:36:19 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id SAA24296 for linac-eng-list; Thu, 10 Apr 2003 18:56:36 -0500 (CDT) Received: from orcus.cancerboard.ab.ca (cancerserver.cancerboard.ab.ca [164.102.1.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id SAA24292 for ; Thu, 10 Apr 2003 18:56:32 -0500 (CDT) Received: from kurma.cancerboard.ab.ca (ccimail.cancerboard.ab.ca [164.102.152.198]) by orcus.cancerboard.ab.ca (8.11.6+Sun/8.10.2) with ESMTP id h3ANvmt26251; Thu, 10 Apr 2003 17:57:48 -0600 (MDT) Received: from cancerboard.ab.ca ([164.102.250.127]) by kurma.cancerboard.ab.ca (Switch-2.2.1/Switch-2.2.0) with ESMTP id h3ANufx22727; Thu, 10 Apr 2003 17:56:41 -0600 (MDT) Date: Thu, 10 Apr 2003 18:02:25 -0600 From: Len Johnson Subject: Klystron 5GPM flow switch Sender: owner-linac-eng@plato.aristotle.net To: "Carfoot, Sidney" , Linac Eng Message-id: <3E960611.BF5DB43C@cancerboard.ab.ca> MIME-version: 1.0 X-Mailer: Mozilla 4.7 [en] (Win95; I) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit Precedence: bulk X-Accept-Language: en X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 10 Apr 2003 18:02:25 -0600 From: Len Johnson Subject: Klystron 5GPM flow switch Sender: owner-linac-eng@plato.aristotle.net To: "Carfoot, Sidney" , Linac Eng X-Accept-Language: en X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Sidney, Our Clinac also has the klystron piped in from the supply header and returning through the flow switch to the return header. There is also a Hayes flow restrictor rated at 7GPM ahead of the flow switch. This flow restrictor has a rubber washer with a very small hole through it to limit the flow. If your system has one of these it is possible that the small hole has become partially blocked and is limiting the flow. The Varian drawing that seems to best show all of this is 876072 rev J. Good luck. Len 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 11 11:26:34 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 193unp-0005yp-00; Fri, 11 Apr 2003 11:26:33 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id BB8661112F2; Fri, 11 Apr 2003 12:21:56 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id DAA27223 for linac-eng-list; Fri, 11 Apr 2003 03:45:05 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail1.nhs.uk (mail1.nhs.uk [213.120.235.81]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id DAA27216 for ; Fri, 11 Apr 2003 03:45:01 -0500 (CDT) Received: from hn-ext by mail1.nhs.uk (Sendmail 8.8.8) with esmtp id 193u93-0002I6-00; Fri, 11 Apr 2003 09:44:25 +0100 Received: from relay.nhs.uk (194.62.42.142) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B600744CD3 for linac-eng@plato.aristotle.net; Fri, 11 Apr 2003 09:44:20 +0100 Received: from relay.wales.nhs.uk (194.189.180.1) by relay.nhs.uk (Syntegra-2 7.0.008) id 3E9137FE00122392 for linac-eng@plato.aristotle.net; Fri, 11 Apr 2003 09:44:25 +0100 X-Internal-ID: 3E8BFA8C0004CA1E Received: from ygc-mail.cd-tr.wales.nhs.uk (131.3.9.10) by relay.wales.nhs.uk (NPlex 2.0.108) for linac-eng@plato.aristotle.net; 11 Apr 2003 09:42:54 +0100 Received: by YGC-MAIL with Internet Mail Service (5.5.2653.19) id ; Fri, 11 Apr 2003 09:44:53 +0100 Message-ID: <4BD1673C955CD41182DA00508BACF2DF042A3B81@YGC-MAIL> From: "Carfoot, Sidney" To: Linac Eng Subject: RE Flow faults Date: Fri, 11 Apr 2003 09:44:44 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f X-Internal-ID: 3E8BFA8C0004CA1E From: "Carfoot, Sidney" To: Linac Eng Subject: RE Flow faults Date: Fri, 11 Apr 2003 09:44:44 +0100 Sender: owner-linac-eng@plato.aristotle.net Thanks for the response. It seems there are quite a few versions out there. We have drawing 876072 rev G. This doesn't show a restrictor. The pipe dia. is 1/2 ". for both flow and return. Perhaps I'll order a new klystron under contract ; ) - Hi Hi. Our flow rate is 4.9 gpm approx. The pipes seem clean. Note that I believe this is US GALLONS. Imperial measures will be lower still, e.g. 4.1 gpm in our case. There is a mod apparently. I will let you know when we have completed it. Regards Sid Carfoot Senior Linac Engineer Medical Physics Department Glan Clwyd Hospital 01745 445110 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 11 17:11:56 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 1940C4-0002Bm-00; Fri, 11 Apr 2003 17:11:56 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8B0E31112F5; Fri, 11 Apr 2003 18:07:26 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id JAA03140 for linac-eng-list; Fri, 11 Apr 2003 09:29:58 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail8.nhs.uk (mail8.nhs.uk [213.120.235.86]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA03135 for ; Fri, 11 Apr 2003 09:29:55 -0500 (CDT) Received: from [194.62.42.123] (helo=relayint2.nhs.uk) by mail8.nhs.uk with esmtp (Exim 4.10) id 193zWu-0001A9-00 for linac-eng@plato.aristotle.net; Fri, 11 Apr 2003 15:29:24 +0100 Received: from relay.nhs.uk (194.62.42.143) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B600762BB4 for linac-eng@plato.aristotle.net; Fri, 11 Apr 2003 15:29:18 +0100 Received: from stobhill-01.NorthGlasgow.scot.nhs.uk (10.249.0.14) by relay.nhs.uk (Syntegra-3 7.0.008) id 3E9138490014FC39 for linac-eng@plato.aristotle.net; Fri, 11 Apr 2003 15:29:24 +0100 Received: by Stobhill-01 with Internet Mail Service (5.5.2650.21) id ; Fri, 11 Apr 2003 15:28:38 +0100 Message-ID: <5D4FCC9BE31DD511B96600508BB9D2CF01CA5956@NORTHNET-09> From: "Skinner, Donald" To: "Linac-Eng (E-mail)" Subject: Oil leaks on Pantak Therapy Unit Date: Fri, 11 Apr 2003 15:28:38 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C30036.A4A92B90" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Skinner, Donald" To: "Linac-Eng (E-mail)" Subject: Oil leaks on Pantak Therapy Unit Date: Fri, 11 Apr 2003 15:28:38 +0100 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C30036.A4A92B90 Content-Type: text/plain; charset="iso-8859-1" We have a Pantak Therapax 300 orthovoltage unit. Since installation (5 years) the unit has had an oil leak at the connection point of the cooling oil pipes to the x-ray tube housing. Any attempt by Pantak engineers or ourselves have been unsuccessful in effecting a repair of any permanency. Pantak supply the unit with a rather insubstantial cooling pipework restraint which ideally is designed to stop the oil pipes moving as the head is repositioned and thus stressing the joints and inducing leakage. Does anyone else out there either have or has had this problem and if so any working solution to sealing the cooling oil pipe joints. Donald Skinner Beatson Oncology Centre Glasgow Scotland _________________________________________________________________ The information contained within this e-mail and in any attachments is confidential and may be privileged. If you are not the intended recipient, please destroy this message, delete any copies held on your systems and notify the sender immediately. You should not retain, copy or use this e-mail for any purpose, nor disclose all or any part of its content to any other person. All messages passing through this gateway are checked for viruses but we strongly recommend that you check for viruses using your own virus scanner as North Glasgow University Hospitals NHS Trust will not take responsibility for any damage caused as a result of virus infection. ------_=_NextPart_001_01C30036.A4A92B90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Oil leaks on Pantak Therapy Unit

We have a Pantak Therapax 300 = orthovoltage unit.

Since installation (5 years) the unit = has had an oil leak at the connection point of the cooling oil pipes to = the x-ray tube housing. Any attempt by Pantak engineers or = ourselves have been unsuccessful in effecting a repair of any = permanency. Pantak supply the unit with a rather insubstantial cooling = pipework restraint which ideally is designed to stop the oil pipes = moving as the head is repositioned and thus stressing the joints and = inducing leakage.

Does anyone else out there either have = or has had this problem and if so any working solution to sealing the = cooling oil pipe joints.

Donald Skinner
Beatson Oncology Centre
Glasgow
Scotland
_________________________________________________________= ________
The information contained within this = e-mail and in any
attachments is confidential and may = be privileged. If you are
not the intended recipient, please = destroy this message, delete
any copies held on your systems and = notify the sender immediately.
You should not retain, copy or use = this e-mail for any purpose,
nor disclose all or any part of its = content to any other person.
All messages passing through this = gateway are checked for viruses
but we strongly recommend that you = check for viruses using your
own virus scanner as North Glasgow = University Hospitals NHS Trust
will not take responsibility for any = damage caused as a result of
virus infection.

------_=_NextPart_001_01C30036.A4A92B90-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 11 18:05:00 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19411Q-0002NO-00; Fri, 11 Apr 2003 18:05:00 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id CD9DE1112F5; Fri, 11 Apr 2003 19:00:29 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id KAA04494 for linac-eng-list; Fri, 11 Apr 2003 10:27:27 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from bajor.cancercare.on.ca ([142.76.1.63]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA04490 for ; Fri, 11 Apr 2003 10:27:19 -0500 (CDT) Received: by bajor.tsrcc.on.ca with Internet Mail Service (5.5.2653.19) id <2H1TAJVL>; Fri, 11 Apr 2003 11:26:30 -0400 Message-ID: <4631AA4F502ED711AE0700A0C9EBCF2964F559@bajor.tsrcc.on.ca> From: "Rozenblat, Alex" To: "'linac'" Subject: Simulator for "to go". Date: Fri, 11 Apr 2003 11:26:29 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Rozenblat, Alex" To: "'linac'" Subject: Simulator for "to go". Date: Fri, 11 Apr 2003 11:26:29 -0400 Sender: owner-linac-eng@plato.aristotle.net Hello, fellows We are planning a decommissioning of one of our old Simulators somewhere in May, June of this year. It was originally manufactured by Therac as Therasim 750 but then (circa 1996) it was retrofitted with new Picker generator of MTX series with new tube and new 2 port 9/12" Image Intensifier. Tube was changed once more after that and I can specify Tube exposures, hours and Generator HV hours to the interested party. All these guts look good and we have some spare parts as well. I cry my eyes out when I think that nice equipment might end up in a garbage bin. Please, do not let me end up my days in a mental institution. So, anyone who has an interest (in whole or in parts), call me or e-mail so we can discuss details. Thank you, Alex Rozenblat TSRCC, Toronto, Canada Phone: 416 - 480 - 4396 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 11 22:51:41 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 1945Ur-0002mr-00; Fri, 11 Apr 2003 22:51:41 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 6E7E41112FA; Fri, 11 Apr 2003 23:47:09 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA23685 for linac-eng-list; Fri, 11 Apr 2003 14:59:46 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from scf.sk.ca (shin.communitynet.ca [216.174.136.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA23681 for ; Fri, 11 Apr 2003 14:59:44 -0500 (CDT) Received: from neried.scf.sk.ca (unverified [172.24.48.3]) by scf.sk.ca (Rockliffe SMTPRA 5.2.4) with SMTP id for ; Fri, 11 Apr 2003 13:59:43 -0600 Received: (from RPC035 [172.24.49.35]) by neried.scf.sk.ca (NAVGW 2.5.2.12) with SMTP id M2003041113590623773 for ; Fri, 11 Apr 2003 13:59:06 -0600 From: scot thiesson To: linac-eng Date: Fri, 11 Apr 2003 13:59:51 -0600 X-Priority: 3 (Normal) Organization: a.b.c.c. Message-Id: Subject: Stabilipan II MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1252" X-Mailer: Opera 6.0 build 1010 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: scot thiesson To: linac-eng Date: Fri, 11 Apr 2003 13:59:51 -0600 X-Priority: 3 (Normal) Organization: a.b.c.c. Subject: Stabilipan II Sender: owner-linac-eng@plato.aristotle.net I know I should have posted this on April 1st but.... We have a Siemens Stabilipan II orthovoltage unit circa pre Cambrian. I require German lessons and a transformer labeled t1 used in the motorized autotransformer circuit. Anyone out there have a junk bin they haven't purged in the last hundred years? Yes? Well look through it for me will ya? I would be thrilled beyond words to have this unit operational once again... I miss the clack! whhhirrr clack !clack! of the regulator sled... Scot Thiesson Senior Physics Technician Allan Blair Cancer Centre Regina Saskatchewan Canada 306-766-2286 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 16 00:47:31 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 195ZD9-0007Kj-00; Wed, 16 Apr 2003 00:47:31 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id F3C221112F5; Wed, 16 Apr 2003 01:42:09 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id RAA07928 for linac-eng-list; Tue, 15 Apr 2003 17:09:50 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from server2.agora.com.ar (IDENT:root@customer190-85.iplannetworks.net [200.61.190.85] (may be forged)) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA07923 for ; Tue, 15 Apr 2003 17:09:47 -0500 (CDT) Received: from cancer.latin-cancer.com ([200.55.48.36]) by server2.agora.com.ar (8.9.3/8.8.7) with ESMTP id TAA02515 for ; Tue, 15 Apr 2003 19:10:33 -0300 Received: from latin-cancer.com (fisica.latin-cancer.com [192.168.80.76]) by cancer.latin-cancer.com (8.8.7/8.8.5) with ESMTP id SAA28744 for ; Tue, 15 Apr 2003 18:33:00 -0300 Message-ID: <3E9C8067.54E17E1D@latin-cancer.com> Date: Tue, 15 Apr 2003 18:57:59 -0300 From: Edgardo Garrigo Organization: IPRO X-Mailer: Mozilla 4.78 [es] (Win95; U) X-Accept-Language: es MIME-Version: 1.0 To: linac list Subject: Chiller Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 15 Apr 2003 18:57:59 -0300 From: Edgardo Garrigo Organization: IPRO X-Accept-Language: es To: linac list Subject: Chiller Sender: owner-linac-eng@plato.aristotle.net Hi, We need to know if two Linac (1 Elekta SL-15 and other Elekta SL-18) can work with the chiller of Elekta SL-15 only. The chiller is the original for the equipment. Thanks -- Ing. Alfredo Gentilini Bioing. Edgardo Garrig�� Instutito Privado de Radioterapia Fundaci��n Marie Curie Obispo Oro 423 (5000) Cordoba ARGENTINA tel: 54 351 469 2020 fax: 54 351 469 1459 email: egarrigo@latin-cancer.com http://www.latin-cancer.com 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 16 02:18:36 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 195adI-0007SJ-00; Wed, 16 Apr 2003 02:18:36 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id C09581112F5; Wed, 16 Apr 2003 03:13:46 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id SAA09291 for linac-eng-list; Tue, 15 Apr 2003 18:44:22 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail.cbdha.nshealth.ca (mail.cbdha.nshealth.ca [142.176.129.245]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id SAA09287 for ; Tue, 15 Apr 2003 18:44:19 -0500 (CDT) Message-Id: <200304152344.SAA09287@plato.aristotle.net> Received: from localhost ([128.222.2.2]) by mail.cbdha.nshealth.ca (Merak 4.2.3) with SMTP id LPA73855 for ; Tue, 15 Apr 2003 20:47:17 -0400 Date: Tue, 15 Apr 2003 20:47:17 -0300 From: Greg MacKinnon To: Linac Eng Subject: 180 Gantry position with AFS X-Mailer: IceWarp Web Mail 3.1.4 X-Originating-IP: 142.176.129.243 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 15 Apr 2003 20:47:17 -0300 From: Greg MacKinnon To: Linac Eng Subject: 180 Gantry position with AFS X-Originating-IP: 142.176.129.243 Sender: owner-linac-eng@plato.aristotle.net Hi Group We have just upgraded our 2100C/D sn1208 clinac console to Ver 6 and replace the old VI with the new AVI and added the option of Auto Fielding Sequence. We are have a problem with patients that have setups to be treated starting at gantry angle of 180 going counter clockwise direction. We are getting an interlock of IPSN. We can clear this interlock by rotation the gantry to the 180 position in the clockwise direction. This then requires for some case to move the couch in order to allow the gantry to get by. Any information on this would be appreciated. Thanks Greg MacKinnon, C.E.T. Linear Accelerator Service Technologist Cape Breton Cancer Centre 1482 George St. Sydney, NS, B1P 1P3 email: mackinnongreg@cbdha.nshealth.ca 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 16 14:57:28 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 195mTg-00047b-00; Wed, 16 Apr 2003 14:57:28 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 6376F1112F5; Wed, 16 Apr 2003 15:52:36 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA07773 for linac-eng-list; Wed, 16 Apr 2003 07:23:39 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsmq01.netvigator.com (imsmq01.netvigator.com [218.102.49.35]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA07769 for ; Wed, 16 Apr 2003 07:23:37 -0500 (CDT) Received: (qmail 27259 invoked from network); 16 Apr 2003 12:23:19 -0000 Received: from pcd334132.netvigator.com (HELO kyeung) (203.218.124.132) by imsmq01.netvigator.com with SMTP; 16 Apr 2003 12:23:19 -0000 Message-ID: <006801c30412$f5b66680$5b1afea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: x-ray machine: AEC calibration with green film cassette Date: Wed, 16 Apr 2003 20:23:17 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0065_01C30456.03B814C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: x-ray machine: AEC calibration with green film cassette Date: Wed, 16 Apr 2003 20:23:17 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0065_01C30456.03B814C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, Varian Ximatron=20 We are having problem to calibrate the AEC with a green film cassette = which has a fast response at high kV and very poor response at low kV. Could anyone share the AEC calibration experience with green film = cassette? Thanks in advance. Kim Yeung=20 ------=_NextPart_000_0065_01C30456.03B814C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

=20 Varian Ximatron

We are having problem to calibrate the = AEC with a=20 green film cassette which has a fast response at high kV and very poor = response=20 at low kV.

Could anyone share the AEC = calibration=20 experience with green film cassette?

Thanks in advance.

Kim = Yeung

------=_NextPart_000_0065_01C30456.03B814C0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 16 17:35:55 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 195ox1-0006hT-00; Wed, 16 Apr 2003 17:35:55 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E8FC21112F5; Wed, 16 Apr 2003 18:31:00 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA10621 for linac-eng-list; Wed, 16 Apr 2003 10:09:15 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail.cbdha.nshealth.ca (mail.cbdha.nshealth.ca [142.176.129.245]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA10617 for ; Wed, 16 Apr 2003 10:09:13 -0500 (CDT) Message-Id: <200304161509.KAA10617@plato.aristotle.net> Received: from localhost ([128.222.2.2]) by mail.cbdha.nshealth.ca (Merak 4.2.3) with SMTP id LPA73855 for ; Wed, 16 Apr 2003 12:12:15 -0400 Date: Wed, 16 Apr 2003 12:12:15 -0300 From: Greg MacKinnon To: Linac Eng Subject: Re: 180 Gantry position with AFS X-Mailer: IceWarp Web Mail 3.1.4 X-Originating-IP: 142.176.129.243 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 16 Apr 2003 12:12:15 -0300 From: Greg MacKinnon To: Linac Eng Subject: Re: 180 Gantry position with AFS X-Originating-IP: 142.176.129.243 Sender: owner-linac-eng@plato.aristotle.net Hi Group, Problem was solved by adding an E to the gantry angle in VASIS when treating at this angle in the counter clockwise direction. Thanks to all. Greg MacKinnon, C.E.T. Linear Accelerator Service Technologist Cape Breton Cancer Centre 1482 George St. Sydney, NS, B1P 1P3 email: mackinnongreg@cbdha.nshealth.ca > Hi Group > > We have just upgraded our 2100C/D sn1208 clinac console to Ver 6 and replace the old VI > with the new AVI and added the option of Auto Fielding Sequence. > > We are have a problem with patients that have setups to be treated starting at gantry > angle of 180 going counter clockwise direction. We are getting an interlock of IPSN. We > can clear this interlock by rotation the gantry to the 180 position in the clockwise > direction. This then requires for some case to move the couch in order to allow the > gantry to get by. > > Any information on this would be appreciated. > > Thanks > > Greg MacKinnon, C.E.T. > Linear Accelerator Service Technologist > Cape Breton Cancer Centre > 1482 George St. > Sydney, NS, B1P 1P3 > email: mackinnongreg@cbdha.nshealth.ca > > > > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 17 15:25:08 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 1969O0-0005H8-00; Thu, 17 Apr 2003 15:25:08 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 81DB71112F2; Thu, 17 Apr 2003 16:20:09 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA29011 for linac-eng-list; Thu, 17 Apr 2003 07:49:57 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from web80510.mail.yahoo.com (web80510.mail.yahoo.com [66.218.79.80]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA29007 for ; Thu, 17 Apr 2003 07:49:50 -0500 (CDT) Message-ID: <20030417124920.63762.qmail@web80510.mail.yahoo.com> Received: from [218.102.109.83] by web80510.mail.yahoo.com via HTTP; Thu, 17 Apr 2003 13:49:20 BST Date: Thu, 17 Apr 2003 13:49:20 +0100 (BST) From: =?iso-8859-1?q?kim=20yeung?= Subject: Re; Ximatron AEC calibration To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1443305295-1050583760=:62467" Content-Transfer-Encoding: 8bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 17 Apr 2003 13:49:20 +0100 (BST) From: =?iso-8859-1?q?kim=20yeung?= Subject: Re; Ximatron AEC calibration To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --0-1443305295-1050583760=:62467 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Hi Colleagues, Varian Ximatron We are having problem to calibrate the AEC with a green film cassette which has a fast response above 80kV and very poor response at 70kV or below. Could anyone share the AEC calibration experience with green film cassette? Thanks in advance. Kim Yeung --------------------------------- Yahoo! Plus - For a better Internet experience --0-1443305295-1050583760=:62467 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit

Hi Colleagues,

Varian Ximatron

We are having problem to calibrate the AEC with a green film cassette which has a fast response above 80kV and very poor response at 70kV or below.

Could anyone share the AEC calibration experience with green film cassette?

Thanks in advance.

Kim Yeung

Yahoo! Plus - For a better Internet experience
--0-1443305295-1050583760=:62467-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Apr 17 16:46:09 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 196AeP-00068B-00; Thu, 17 Apr 2003 16:46:09 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id E6B701112F2 for ; Thu, 17 Apr 2003 17:41:12 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KUUA0PFGDS8X8M0V@med.uu.nl> for kok@radth.med.uu.nl; Thu, 17 Apr 2003 16:37:22 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KUUA0NEYJQ8XDQJ8@med.uu.nl> for kok@radth.med.uu.nl; Thu, 17 Apr 2003 16:37:18 +0200 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA29011 for linac-eng-list; Thu, 17 Apr 2003 07:49:57 -0500 (CDT) Received: from web80510.mail.yahoo.com (web80510.mail.yahoo.com [66.218.79.80]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA29007 for ; Thu, 17 Apr 2003 07:49:50 -0500 (CDT) Received: from [218.102.109.83] by web80510.mail.yahoo.com via HTTP; Thu, 17 Apr 2003 13:49:20 +0100 (BST) Date: Thu, 17 Apr 2003 13:49:20 +0100 (BST) From: =?iso-8859-1?q?kim=20yeung?= Subject: Re; Ximatron AEC calibration Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net Message-id: <20030417124920.63762.qmail@web80510.mail.yahoo.com> MIME-version: 1.0 Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_2Gzc0UojG4dyvuf8aVJD5w)" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 17 Apr 2003 13:49:20 +0100 (BST) From: =?iso-8859-1?q?kim=20yeung?= Subject: Re; Ximatron AEC calibration Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f --Boundary_(ID_2Gzc0UojG4dyvuf8aVJD5w) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 8bit Hi Colleagues, Varian Ximatron We are having problem to calibrate the AEC with a green film cassette which has a fast response above 80kV and very poor response at 70kV or below. Could anyone share the AEC calibration experience with green film cassette? Thanks in advance. Kim Yeung --------------------------------- Yahoo! Plus - For a better Internet experience --Boundary_(ID_2Gzc0UojG4dyvuf8aVJD5w) Content-type: text/html; charset=iso-8859-1 Content-transfer-encoding: 8bit

Hi Colleagues,

Varian Ximatron

We are having problem to calibrate the AEC with a green film cassette which has a fast response above 80kV and very poor response at 70kV or below.

Could anyone share the AEC calibration experience with green film cassette?

Thanks in advance.

Kim Yeung

Yahoo! Plus - For a better Internet experience
--Boundary_(ID_2Gzc0UojG4dyvuf8aVJD5w)-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 21 19:33:39 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 197fAh-0007SK-00; Mon, 21 Apr 2003 19:33:39 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 467C51112F3; Mon, 21 Apr 2003 20:28:13 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA14379 for linac-eng-list; Mon, 21 Apr 2003 12:10:37 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from ismssclu1.umcaz.edu (smtp.umcaz.edu [198.60.159.10]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA14375 for ; Mon, 21 Apr 2003 12:10:36 -0500 (CDT) Received: from xchange.umcaz.edu ([170.87.50.25]) by ismssclu1 with InterScan Messaging Security Suite; Mon, 21 Apr 2003 10:08:26 -0700 Received: by xchange.umcaz.edu with Internet Mail Service (5.5.2653.19) id ; Mon, 21 Apr 2003 10:08:26 -0700 Message-ID: From: "Watters, Dan" To: "'linac-eng@plato.aristotle.net'" Subject: IMPAC Info Date: Mon, 21 Apr 2003 10:08:25 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Watters, Dan" To: "'linac-eng@plato.aristotle.net'" Subject: IMPAC Info Date: Mon, 21 Apr 2003 10:08:25 -0700 Sender: owner-linac-eng@plato.aristotle.net We have a Siemens MD-2 that uses IMPAC. We have lately been having intermittent problems with downloading the patient treatment into the linac. We get communications timeouts, error downloading messages, and the odd lockup of the linac. In one instance we had the same problem on the same patient on the same field everyday. Dosimetry re-downloaded the treatment from Theraplan and that problem went away. However this has not worked on other patients. We have had days when we had no problems and days when the problem has occurred 5 or 6 times. Has anyone else out there run into this? I can find no information that tells me how this download process is accomplished through the VMI. I have no linac parameters, that I know of, that can be used to change communications timeouts. Any information would be greatly appreciated. Dan Watters University Medical Center Tucson, AZ. CONFIDENTIALITY NOTICE: This message and any included attachments are from University Medical Center Corporation and are intended only for the addressee. The information contained in this message is confidential and may constitute inside or non-public information under international, federal, or state laws and is intended only for the use of the addressee. Unauthorized forwarding, copying, printing, distributing, or using such information is strictly prohibited and may be unlawful. If you are not the addressee, please promptly delete this message and notify the sender of the delivery error by e-mail or you may call University Medical Center in Tucson, Arizona, USA at (520) 694-6417. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 21 19:33:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 197fAn-0007SP-00; Mon, 21 Apr 2003 19:33:45 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8C28D1112F3; Mon, 21 Apr 2003 20:28:27 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA14323 for linac-eng-list; Mon, 21 Apr 2003 12:02:40 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail1.radiological.com (mail1.radiological.com [206.13.127.226]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA14319 for ; Mon, 21 Apr 2003 12:02:38 -0500 (CDT) Received: from Unknown [10.1.1.109] by mail1.radiological.com - SurfControl E-mail Filter (4.5); Monday, 21 April 2003, 10:02:47 Received: from RASROUTING-MTA by mail1.radiological.com with Novell_GroupWise; Mon, 21 Apr 2003 10:02:02 -0700 Message-ID: From: "Nelson Lacsina" To: Date: Mon, 21 Apr 2003 10:01:55 -0700 Subject: mlc maintenance MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Mailer: Novell GroupWise Internet Agent 6.0.2 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Nelson Lacsina" To: Date: Mon, 21 Apr 2003 10:01:55 -0700 Subject: mlc maintenance Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net I need some help on an issue concerning mlc maintenance problems....We have an 80 leaf Mark that has had intermittent problems of late so we had a Varian rep come in and do a complete PMI and overall evaluation....The question of how many service calls we could anticipate per quarter was raised...He stated that he would not anticipate more than one service call a quarter...In my experience this number is low....I need to get a concensus of the group concerning the number of service calls per quarter you are experiencing (specifically marks) thanks, Nelson CONFIDENTIALITY NOTICE: This email and any attachments may contain confidential and privileged information for the use of the designated recipients named above. If you are not the intended recipient, you are hereby notified that you have received this communication in error and that any review, disclosure, dissemination, distribution or copying of it or its contents is prohibited. If you have received this communication in error, please destroy all copies of this communication and any attachments. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 21 22:29:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 197hv7-0007fA-00; Mon, 21 Apr 2003 22:29:45 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 7000B1112F9; Mon, 21 Apr 2003 23:24:24 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA18356 for linac-eng-list; Mon, 21 Apr 2003 14:49:43 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mopsy.musc.edu (mopsy.musc.edu [128.23.203.176]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA18352 for ; Mon, 21 Apr 2003 14:49:42 -0500 (CDT) Received: from revere3.musc.edu (revere3.musc.edu [128.23.203.10]) by mopsy.musc.edu (8.12.9/8.12.9) with ESMTP id h3LJnBP4031510 for ; Mon, 21 Apr 2003 15:49:11 -0400 Received: from XCHANGE2k.radonc2k.musc.edu (xchange2k.RadOnc.MUSC.EDU [128.23.55.250]) by revere3.musc.edu (8.12.9/8.12.9) with ESMTP id h3LJnAc8031945 for ; Mon, 21 Apr 2003 15:49:11 -0400 (EDT) content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C3083F.13F3620F" Subject: Oldelft Simulex MC Table weight limit X-MIMEOLE: Produced By Microsoft Exchange V6.0.6249.0 Date: Mon, 21 Apr 2003 15:49:10 -0400 Message-ID: Thread-Topic: Oldelft Simulex MC Table weight limit Thread-Index: AcMIPxQueSbIqvW1QDKTnsDKvkX32g== From: "Nelson, Steve"

-----Original Message-----
From: kim = yeung=20 [mailto:kimyeung@netvigator.com]
Sent: Friday, April 25, = 2003 8:54=20 AM
To: linac-eng
Subject: Re: EDW=20 limitations

Hi Colleagues,

Varian Clinac = Version=20 6:EDW

Are there any limitations on the jaw = speeds when=20 running EDW?

Any advice?

Best regards,

Kim = Yeung

=00 ------_=_NextPart_001_01C30B42.74AB1849-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 25 19:06:20 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 1996eS-0004c6-00; Fri, 25 Apr 2003 19:06:20 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0A34E1112F4 for ; Fri, 25 Apr 2003 20:00:45 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KV5LAA5IW08WZNEZ@med.uu.nl> for kok@radth.med.uu.nl; Fri, 25 Apr 2003 18:59:08 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KV5LA6WKV48X4IT8@med.uu.nl> for kok@radth.med.uu.nl; Fri, 25 Apr 2003 18:59:04 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA07576 for linac-eng-list; Fri, 25 Apr 2003 09:00:23 -0500 (CDT) Received: from scmcmail.st-claire.org ([63.76.91.90]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA07572 for ; Fri, 25 Apr 2003 09:00:21 -0500 (CDT) Received: by SCMCMAIL with Internet Mail Service (5.5.2655.55) id ; Fri, 25 Apr 2003 09:59:44 -0400 Date: Fri, 25 Apr 2003 09:59:35 -0400 From: "Conn, Calvin R." Subject: RE:Question about Radiation/Light Field Coincidence Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net Message-id: <567B4C40AC2ED411BB2300B0D021D9BA0281D0F3@SCMCMAIL> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-type: text/plain Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Fri, 25 Apr 2003 09:59:35 -0400 From: "Conn, Calvin R." Subject: RE:Question about Radiation/Light Field Coincidence Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Hello Scott, I don't know about using a water scanner that sounds like too much trouble to me. I pretty much have checked coincidence like you are now except I do add extra exposures with the table moved up from isocenter and one down from isocenter. I draw diagonal lines on the largest image and look for matching the smaller images if there is any misalignment it will show up this way. This doesn't tell you if the table is the problem or if it is the light field, but, it should indicate that something is wrong or not. Calvin R. Conn crconn@st-claire.org DISCLAIMER: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this message in error, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately, by e-mail, if you have received this message by mistake and delete the message from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of St. Claire Regional Medical Center. 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Apr 25 20:38:55 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 199863-0004k1-00; Fri, 25 Apr 2003 20:38:55 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 7A5A01112F4 for ; Fri, 25 Apr 2003 21:33:17 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KV5OJ1OB348X0IVT@med.uu.nl> for kok@radth.med.uu.nl; Fri, 25 Apr 2003 20:31:42 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KV5OIXUYFQ8XCZ27@med.uu.nl> for kok@radth.med.uu.nl; Fri, 25 Apr 2003 20:31:40 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA11068 for linac-eng-list; Fri, 25 Apr 2003 10:04:42 -0500 (CDT) Received: from mail3.nhs.uk (mail3.nhs.uk [194.72.23.240]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA11058 for ; Fri, 25 Apr 2003 10:04:39 -0500 (CDT) Received: from hn-ext by mail3.nhs.uk (Sendmail 8.8.8) with esmtp id 1994kf-0001ch-00; Fri, 25 Apr 2003 16:04:37 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B6009C0014 for linac-eng@plato.aristotle.net; Fri, 25 Apr 2003 16:04:37 +0100 Received: from mercury.University-b.wmids.nhs.uk (193.240.116.176) by relay.nhs.uk (Syntegra-1 7.0.008) (authenticated as smtp_uhb_nhs_uk@es2002.nhs.uk) id 3EA929B70000F330 for linac-eng@plato.aristotle.net; Fri, 25 Apr 2003 16:04:37 +0100 Received: by MERCURY with Internet Mail Service (5.5.2653.19) id ; Fri, 25 Apr 2003 16:04:36 +0100 Date: Fri, 25 Apr 2003 15:56:43 +0100 From: Graham Chalmers Subject: Varian 120 leaf MLC Sender: owner-linac-eng@plato.aristotle.net To: 'linac-eng' Message-id: <71A7A8BA33E3D511AF5E00034797029B0588ED27@HERMES> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: text/plain; charset="iso-8859-1" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Fri, 25 Apr 2003 15:56:43 +0100 From: Graham Chalmers Subject: Varian 120 leaf MLC Sender: owner-linac-eng@plato.aristotle.net To: 'linac-eng' X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Dear Colleagues I would be grateful for anyone's comments on issues I should be aware of should we consider purchasing such an item. I am particularly interested in comments good or bad about reliability, parts that may require often replacement etc. Many thanks Graham ChalmersDISCLAIMER: This e-mail contains proprietary information some or all of which may be confidential or legally privileged. It is for the exclusive use of the intended recipient(s) only. If an addressing or transmission error has misdirected this e-mail and you are not the intended recipient(s), please notify the author by replying to this e-mail. If you are not the intended recipient you must not use, disclose, distribute, copy, print, or rely on this e-mail, as this may be unlawful. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Sat Apr 26 11:58:38 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 199MS6-0005nN-00; Sat, 26 Apr 2003 11:58:38 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 46B681112F2; Sat, 26 Apr 2003 12:52:49 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id EAA14444 for linac-eng-list; Sat, 26 Apr 2003 04:24:55 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsm032.netvigator.com (imsm032.netvigator.com [218.102.23.102]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id EAA14440 for ; Sat, 26 Apr 2003 04:24:52 -0500 (CDT) Received: (qmail 15448 invoked from network); 26 Apr 2003 09:24:36 -0000 Received: from n218103166129.netvigator.com (HELO kyeung) (218.103.166.129) by imsm032.netvigator.com with SMTP; 26 Apr 2003 09:24:36 -0000 Message-ID: <002701c30bd5$a4cddbc0$2e21fea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: Varian EDW DPSN interlock Date: Sat, 26 Apr 2003 17:24:28 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0024_01C30C18.B10A5A60" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: Varian EDW DPSN interlock Date: Sat, 26 Apr 2003 17:24:28 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0024_01C30C18.B10A5A60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, I read the following form Varian's EDW manual: "The DPSN interlock guaranties that throughout the EDW treatment, no = dose is delivered unless the collimator position is within 2cm of its = required position" Could anyone kindly comment the above statement? Best regards, Kim Yeung ------=_NextPart_000_0024_01C30C18.B10A5A60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

I read the following form Varian's EDW=20 manual:

"The DPSN interlock = guaranties=20 that throughout the EDW treatment, no dose is delivered unless the = collimator=20 position is within 2cm of its required position"

Could anyone kindly comment the above=20 statement?

Best regards,

Kim Yeung

------=_NextPart_000_0024_01C30C18.B10A5A60-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 28 01:00:41 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 199v8T-00011L-00; Mon, 28 Apr 2003 01:00:41 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B772F110604; Mon, 28 Apr 2003 01:54:48 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA06293 for linac-eng-list; Sun, 27 Apr 2003 17:21:19 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from web40710.mail.yahoo.com (web40710.mail.yahoo.com [66.218.78.167]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id RAA06289 for ; Sun, 27 Apr 2003 17:21:17 -0500 (CDT) Message-ID: <20030427222047.66749.qmail@web40710.mail.yahoo.com> Received: from [203.109.249.138] by web40710.mail.yahoo.com via HTTP; Sun, 27 Apr 2003 23:20:47 BST Date: Sun, 27 Apr 2003 23:20:47 +0100 (BST) From: =?iso-8859-1?q?pankaj=20roy?= Subject: More on Radiation/Light Field Coincidence To: Scott Mange , linac-eng@plato.aristotle.net In-Reply-To: <5.1.0.14.0.20030424100322.00a392e0@mailhost.det.ameritech.net> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Sun, 27 Apr 2003 23:20:47 +0100 (BST) From: =?iso-8859-1?q?pankaj=20roy?= Subject: More on Radiation/Light Field Coincidence To: Scott Mange , linac-eng@plato.aristotle.net In-Reply-To: <5.1.0.14.0.20030424100322.00a392e0@mailhost.det.ameritech.net> Sender: owner-linac-eng@plato.aristotle.net Dear Scott, I am not sure how it works for Varian machines, but here is something that I do in Siemens. Assuming that the radiation centre is OK, ( important:--remember,the jaw position is not at all a good starting reference----forget about the jaw position. Also do not put the Reticle in to start with) a) Do a film test for the coincidence at 100 SSD, with Collimator at 0 deg, and a field size of about 30X30 b) If the coincidence is OK, we have now a reference. ( if not, ---adjust the mirror angle etc.) c) Now stick some plain paper on the table, and turn the field light on. Mark the outlines. Rotate the collimator to 180 deg. See if the outlines match ( well almost, not more than 2mm out) d) If the outlines don't match, there is something wrong with MIRROR position. e) If you find you cannot change the mirror position, there is something wrong with the MIRROR-LAMP relationship. f) The bottom line is,-- the field outline as seen on the paper should be nearly matching at Collimator angles of 0 deg and 180 deg.( as in step 'c') Check for coincidence films at both the collimator angles. Should be OK. After all this-------you can now adjust the Jaw calibration, and the Reticle crosswire position if required, and then the others like Lasers, range Finder etc. Best of luck, Happy adjusting! Pankaj Roy --- Scott Mange wrote: > Dear Engineers, > > Would you please describe for me the process of > matching the radiation > field and the projected light field? I don't know > if there are different > procedures for different machines but I'm especially > interested in a Varian > Clinac 1800. > > To double check the match I'm been scribing film > with a pen and then > exposing the film. They match up pretty well at > 100cm but at extended SSDs > and nearer distances there is a mismatch. > > I've been told this needs to be done with a water > scanner but it seems to > me it could be done with film just as easily. > > Thoughts? > > Many Thanks, > Scott Mange > __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 28 09:43:47 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19A3If-0002Xk-00; Mon, 28 Apr 2003 09:43:45 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id DECF91112F3; Mon, 28 Apr 2003 10:37:51 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id CAA26614 for linac-eng-list; Mon, 28 Apr 2003 02:13:50 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail (mail.vll.se [193.10.32.12]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id CAA26610 for ; Mon, 28 Apr 2003 02:13:48 -0500 (CDT) From: magnus.jalmbrant@radfys.umu.se Message-Id: Date: Mon, 28 Apr 2003 9:13:04 +0200 To: paul.twyman@addenbrookes.nhs.uk, linac-eng@plato.aristotle.net Subject: Re: Siemens Primus Y Jaw Overtravel MIME-version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Mailer: TFS Secure Messaging /320000000/460000103/460200035/460820098/ X-Mailer: Version 4.72 Build 101 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id CAA26611 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: magnus.jalmbrant@radfys.umu.se Date: Mon, 28 Apr 2003 9:13:04 +0200 To: paul.twyman@addenbrookes.nhs.uk, linac-eng@plato.aristotle.net Subject: Re: Siemens Primus Y Jaw Overtravel X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id CAA26611 Sender: owner-linac-eng@plato.aristotle.net Ok, I was a little bit messy in my fault description. The problem is getting worse as I am getting closer to -10, to the eye it looks as the light field travels further than expected (i.e. if position -10 is set it looks like it stops on -10.5, so at it��s worst its 5mm). The "fault" is the same for both jaws, and is not present att any positions except for the negative ones. However since the radiation seems to be correct, the problem in a clinical point of view is not too big. The only downside is when the therapists verify the fields before treatment start (compare the fields to the plans) its a bit uncertain for them to know if its OK or not when you can��t trust the fieldlight in negative positions. I have gotten many suggestions about the possible causes to the problem and I will check and verify the ones that I haven��t yet tried. Thought it was an "interesting" fenomena though. Thanks to everyone that has contributed so far. Regards Magnus J��lmbrant Ume�� University Hospital Sweden ----- Original Message ----- From: "Twyman, Paul" To: ; Sent: Friday, April 25, 2003 1:56 PM Subject: RE: Siemens Primus Y Jaw Overtravel Magnus We also have Siemens Primus machines here in Cambridge, UK. In order to understand your problem could you please indicate by how much the light field is 'too small' when the Y jaw is in an overtravel position. I would ask the same question as Chris Forrest - 'Does the problem get progressively worse at you get nearer to -10cm' Are we talking a couple of millimetres or 5mm. I believe that the spec. is 2mm. Paul Twyman MTO5 Medical Physics Dept. Box 152 Addenbrookes Hospital. Hills Rd. Cambridge. CB2 2QQ Tel 01223-586782 Fax 01223 257137 -----Original Message----- From: magnus.jalmbrant@radfys.umu.se [mailto:magnus.jalmbrant@radfys.umu.se] Sent: 23 April 2003 09:18 To: linac-eng@plato.aristotle.net Subject: Siemens Primus Y Jaw Overtravel We have an intresting fenomena that occurs on our Siemens Primus (Klystron) S/N 3559. When we are setting up treatment fields that uses overtravel of the Y Jaws the field-light does not correspond to the radiation. If for example Y1 is set to a postion between 20 and 0, lightfield and radiation matches perfectly. However if position is set between 0 and -10 (ie overtravel) the light field indicates that the Jaw travels to far into the radiation field (ie field size seem to be to small), when checking with film this shows that the radiation corresponds to the set up position but the field-light does not. The same happens for Jaw Y2. Intresting is that the siemens calibration routine for the Y jaws only covers two positions and both is in between 0 and 20 cm (ie 5 & 35 cm fieldsize) field. With "normal" fields field-light size and postions are perfectly ok. Has anyone else seen this "problem"? Ideas to the cause? Regards Magnus J��lmbrant Ume�� University Hospital Sweden 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 28 13:23:25 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19A6jF-0004FY-00; Mon, 28 Apr 2003 13:23:25 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A577011131B; Mon, 28 Apr 2003 14:17:33 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id FAA06706 for linac-eng-list; Mon, 28 Apr 2003 05:52:25 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail8.nhs.uk (mail8.nhs.uk [213.120.235.86]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id FAA06702 for ; Mon, 28 Apr 2003 05:52:23 -0500 (CDT) From: David.Smith@arh.grampian.scot.nhs.uk Received: from [194.62.42.123] (helo=relayint1.nhs.uk) by mail8.nhs.uk with esmtp (Exim 4.10) id 19A6Ei-00060O-00 for linac-eng@plato.aristotle.net; Mon, 28 Apr 2003 11:51:52 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E6077120094AD20 for linac-eng@plato.aristotle.net; Mon, 28 Apr 2003 11:51:52 +0100 Received: from mta.grampian.scot.nhs.uk (195.106.102.11) by relay.nhs.uk (Syntegra-1 7.0.008) id 3EA929B70004ED08; Mon, 28 Apr 2003 11:51:52 +0100 Received: from arh_mail.grampian.scot.nhs.uk (actually host arh.grampian.scot.nhs.uk) by mta.grampian.scot.nhs.uk with SMTP (Mailer) with ESMTP; Mon, 28 Apr 2003 11:46:32 +0100 Received: by arh.grampian.scot.nhs.uk with Internet Mail Service (5.5.2650.21) id ; Mon, 28 Apr 2003 11:49:53 +0100 Message-ID: <5FB97D7B340FD2118A6100A0C9A9A1F505D07D70@arh.grampian.scot.nhs.uk> To: MEADOWSJ@trinity-health.org Cc: linac-eng@plato.aristotle.net Subject: RE: FW: Question about Radiation/Light Field Coincidence Date: Mon, 28 Apr 2003 11:49:48 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: David.Smith@arh.grampian.scot.nhs.uk To: MEADOWSJ@trinity-health.org Cc: linac-eng@plato.aristotle.net Subject: RE: FW: Question about Radiation/Light Field Coincidence Date: Mon, 28 Apr 2003 11:49:48 +0100 Sender: owner-linac-eng@plato.aristotle.net Joe, We made a lead cross with 2mm notches cut in it at 5, 10, 15 and 20 cm intervals. We then align the light field with the notches on the lead cross at 100 fsd. We then take an exposure of about 21 X 21cm and then 4 separate exposures at each field size, coming down in size each time using the double exposure facility. Use"repeat acquisition" after the first two exposures to get one picture with all field sizes. The imager software will automatically look for a quick transition between fields and draws in a red line round each field size. We then look to see if the red line falls within the notches in the lead cross, if they do then we are happy. You can also use the ruler facility to check the irradiated field size. Hope this info is of use. Dave > -----Original Message----- > From: Joey Meadows [SMTP:MEADOWSJ@trinity-health.org] > Sent: Friday, April 25, 2003 1:36 PM > To: David.Smith > Subject: Re: FW: Question about Radiation/Light Field Coincidence > > David, > I would be very interested in hearing how you do Xray?light Field > testing using the EPID. We have the aSi Imager on our 2100EX and it > would be nice to be able to do that. I look forward to your response. > Thanks in advance. > Best regards, > Joe Meadows M.S. > St Mary's Cancer Center > Grand Rapids,MI > 616-752-6218 > meadowsj@trinity-health.org > > >>> 04/25/03 04:49AM >>> > > > > -----Original Message----- > > From: Smith, David Mr > > Sent: Thursday, April 24, 2003 4:56 PM > > To: 'Scott Mange' > > Subject: RE: Question about Radiation/Light Field Coincidence > > > > Scott, > > > > Portal vision has more or less erradicated the use of film for light > > field/ X-Ray matching in our department. > > > > However a method that we used to use with an ABB machine and an SL75 > was > > to use Kodak Xomat V film set at 100 fsd and mark the light field > edges > > with a pen.We would then expose the film with 60 mu beneath build up > of 10 > > cm for photon energies. We then, in order to get a 50% reference so > we > > could mark the field edges, would expose about 4 cm at the edge of > the > > film with 30 mu. These doses were used because they tended to lie > within > > the linear region of the film response. This reference was then > measured > > using a densitometer. The value obtained was then used to find the > edges > > on the main exposure. We also used the same film as a quick flatness > and > > symmetry check, although the tank is more accurate. Nowadays we use > > Victoreen's double check for quick checks of flatness and symmetry. > I > > don't know how you would do light field / X-Ray alignment using a > water > > scanner. > > > > -----Original Message----- > > From: Scott Mange [SMTP:smange@ameritech.net] > > Sent: Thursday, April 24, 2003 3:07 PM > > To: linac-eng@plato.aristotle.net > > Subject: Question about Radiation/Light Field Coincidence > > > > Dear Engineers, > > > > Would you please describe for me the process of matching the > radiation > > field and the projected light field? I don't know if there are > different > > procedures for different machines but I'm especially interested in a > > Varian > > Clinac 1800. > > > > To double check the match I'm been scribing film with a pen and then > > > exposing the film. They match up pretty well at 100cm but at > extended > > SSDs > > and nearer distances there is a mismatch. > > > > I've been told this needs to be done with a water scanner but it > seems to > > me it could be done with film just as easily. > > > > Thoughts? > > > > Many Thanks, > > Scott Mange 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 28 15:15:18 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19A8TW-0005kK-00; Mon, 28 Apr 2003 15:15:18 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id CB52C1105E5; Mon, 28 Apr 2003 16:09:26 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA08628 for linac-eng-list; Mon, 28 Apr 2003 07:38:30 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from bajor.cancercare.on.ca ([142.76.1.63]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA08624 for ; Mon, 28 Apr 2003 07:38:27 -0500 (CDT) Received: by bajor.tsrcc.on.ca with Internet Mail Service (5.5.2653.19) id ; Mon, 28 Apr 2003 08:37:35 -0400 Message-ID: <4631AA4F502ED711AE0700A0C9EBCF2964F565@bajor.tsrcc.on.ca> From: "Rozenblat, Alex" To: "'pankaj roy'" , Scott Mange , linac-eng@plato.aristotle.net Subject: RE: More on Radiation/Light Field Coincidence Date: Mon, 28 Apr 2003 08:37:33 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Rozenblat, Alex" To: "'pankaj roy'" , Scott Mange , linac-eng@plato.aristotle.net Subject: RE: More on Radiation/Light Field Coincidence Date: Mon, 28 Apr 2003 08:37:33 -0400 Sender: owner-linac-eng@plato.aristotle.net Hello, Pankaj I don't think that your procedure for aligning mirror is right because in Siemens linacs the light/mirror system does not rotate when Collimator is rotated. To eliminate this problem and still do mirror alignment there was a special jig created in our Centre, which is attached to accessory holder and rotates with collimator. I don't want to go into details, but think about it. Alex Rozenblat TSRCC, Toronto PS. Read without fear - no SARS is attached to this message. -----Original Message----- From: pankaj roy [mailto:pankajroy135@yahoo.co.uk] Sent: 27 April 2003 18:21 To: Scott Mange; linac-eng@plato.aristotle.net Subject: More on Radiation/Light Field Coincidence Dear Scott, I am not sure how it works for Varian machines, but here is something that I do in Siemens. Assuming that the radiation centre is OK, ( important:--remember,the jaw position is not at all a good starting reference----forget about the jaw position. Also do not put the Reticle in to start with) a) Do a film test for the coincidence at 100 SSD, with Collimator at 0 deg, and a field size of about 30X30 b) If the coincidence is OK, we have now a reference. ( if not, ---adjust the mirror angle etc.) c) Now stick some plain paper on the table, and turn the field light on. Mark the outlines. Rotate the collimator to 180 deg. See if the outlines match ( well almost, not more than 2mm out) d) If the outlines don't match, there is something wrong with MIRROR position. e) If you find you cannot change the mirror position, there is something wrong with the MIRROR-LAMP relationship. f) The bottom line is,-- the field outline as seen on the paper should be nearly matching at Collimator angles of 0 deg and 180 deg.( as in step 'c') Check for coincidence films at both the collimator angles. Should be OK. After all this-------you can now adjust the Jaw calibration, and the Reticle crosswire position if required, and then the others like Lasers, range Finder etc. Best of luck, Happy adjusting! Pankaj Roy --- Scott Mange wrote: > Dear Engineers, > > Would you please describe for me the process of > matching the radiation > field and the projected light field? I don't know > if there are different > procedures for different machines but I'm especially > interested in a Varian > Clinac 1800. > > To double check the match I'm been scribing film > with a pen and then > exposing the film. They match up pretty well at > 100cm but at extended SSDs > and nearer distances there is a mismatch. > > I've been told this needs to be done with a water > scanner but it seems to > me it could be done with film just as easily. > > Thoughts? > > Many Thanks, > Scott Mange > __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 28 15:48:43 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19A8zr-00068q-00; Mon, 28 Apr 2003 15:48:43 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 840A31105E6; Mon, 28 Apr 2003 16:42:52 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA09136 for linac-eng-list; Mon, 28 Apr 2003 08:16:18 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from cgatepro-2.mail.virginia.edu (neon.mail.Virginia.EDU [128.143.2.220]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA09131 for ; Mon, 28 Apr 2003 08:16:16 -0500 (CDT) Received: from [128.143.152.152] (HELO rtritmr.virginia.edu) by cgatepro-2.mail.virginia.edu (CommuniGate Pro SMTP 4.0.6) with ESMTP id 43257237 for linac-eng@plato.aristotle.net; Mon, 28 Apr 2003 09:16:15 -0400 Message-Id: <5.1.0.14.2.20030428090511.00a29c50@a.mail.virginia.edu> X-Sender: aa2h@a.mail.virginia.edu X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Mon, 28 Apr 2003 09:15:24 -0400 To: linac-eng@plato.aristotle.net From: Al Aqualino Subject: Re: More on Radiation/Light Field Coincidence In-Reply-To: <20030427222047.66749.qmail@web40710.mail.yahoo.com> References: <5.1.0.14.0.20030424100322.00a392e0@mailhost.det.ameritech.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f X-Sender: aa2h@a.mail.virginia.edu Date: Mon, 28 Apr 2003 09:15:24 -0400 To: linac-eng@plato.aristotle.net From: Al Aqualino Subject: Re: More on Radiation/Light Field Coincidence In-Reply-To: <20030427222047.66749.qmail@web40710.mail.yahoo.com> Sender: owner-linac-eng@plato.aristotle.net At 11:20 PM 4/27/03 +0100, someone wrote: >I am not sure how it works for Varian machines, but >here is something that I do in Siemens. >f) The bottom line is,-- the field outline as seen on >the paper should be nearly matching at Collimator >angles of 0 deg and 180 deg.( as in step 'c') I think this depends upon whether the light source rotates with the collimator or not - for some manufacturer's equipment, it does. In such cases, one can ensure the bulb is aligned along the mechanical axes by placing a pencil point near the table and projecting the light; if the bulb is not centered, the shadow of the bulb will trace out a circle when the collimator is rotated. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 28 15:49:24 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19A90W-00069Y-00; Mon, 28 Apr 2003 15:49:24 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 4C0A01105E7; Mon, 28 Apr 2003 16:43:33 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA09236 for linac-eng-list; Mon, 28 Apr 2003 08:20:25 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsmq01.netvigator.com (imsmq01.netvigator.com [218.102.49.35]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id IAA09232 for ; Mon, 28 Apr 2003 08:20:22 -0500 (CDT) Received: (qmail 25927 invoked from network); 28 Apr 2003 13:19:49 -0000 Received: from n218103173048.netvigator.com (HELO kyeung) (218.103.173.48) by imsmq01.netvigator.com with SMTP; 28 Apr 2003 13:19:49 -0000 Message-ID: <000e01c30d88$d40f6d40$fd27fea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: Varian pendant coiled cable Date: Mon, 28 Apr 2003 21:19:41 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01C30DCB.E207F3C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: Varian pendant coiled cable Date: Mon, 28 Apr 2003 21:19:41 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C30DCB.E207F3C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, Varian Clinac C-series Could anyone advise the second source of the coiled cable for Varian's = pendant? Does anyone know the detailed procedure for fabrication of coiled = cable?=20 Best regards, Kim Yeung=20 ------=_NextPart_000_000B_01C30DCB.E207F3C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

= Varian Clinac=20 C-series

Could anyone advise the second source = of the=20 coiled cable for Varian's pendant?

Does anyone know the detailed procedure = for=20 fabrication of coiled cable?

Best regards,

Kim Yeung

------=_NextPart_000_000B_01C30DCB.E207F3C0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon Apr 28 17:41:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AAlF-0007XC-00; Mon, 28 Apr 2003 17:41:45 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id D1EBB1105F1; Mon, 28 Apr 2003 18:35:51 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id KAA13035 for linac-eng-list; Mon, 28 Apr 2003 10:08:55 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from EXCHVS2.medctr.ad.wfubmc.edu (exchvs2.medctr.ad.wfubmc.edu [152.11.200.73] (may be forged)) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA13031 for ; Mon, 28 Apr 2003 10:08:53 -0500 (CDT) X-MimeOLE: Produced By Microsoft Exchange V6.0.6249.0 content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C30D97.D5091B89" Subject: RE: Varian pendant coiled cable Date: Mon, 28 Apr 2003 11:07:06 -0400 Message-ID: <9AEEF1FB6254224AA355ED285F849165038753@EXCHVS2.medctr.ad.wfubmc.edu> Thread-Topic: Varian pendant coiled cable Thread-Index: AcMNlC4v730JMos1TRCc4ZoONpOO8QAAMZJQ From: "Tim Cullen" To: "kim yeung" , "linac-eng" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f X-MimeOLE: Produced By Microsoft Exchange V6.0.6249.0 content-class: urn:content-classes:message Subject: RE: Varian pendant coiled cable Date: Mon, 28 Apr 2003 11:07:06 -0400 Thread-Topic: Varian pendant coiled cable Thread-Index: AcMNlC4v730JMos1TRCc4ZoONpOO8QAAMZJQ From: "Tim Cullen" To: "kim yeung" , "linac-eng" Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------_=_NextPart_001_01C30D97.D5091B89 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Kim =20 You can purchase these from Digi-Key here in the USA. Good prices for bulk purchases and they have various lengths. You can purchase a modular crimp tool in any electronics supply house or catalog. The tool will have a stripper on it and termination crimper. The only thing to make sure of is to purchase the right RJ-45 termination, they make one for stranded and one for solid wire. No magic to it, straight through connection. There'll probably be some discussion regarding spec's on the cable itself, but I have been using these for years with good results. The cost is below 10.00 US so it makes replacing them painless. Tim =20 =20 -----Original Message----- From: kim yeung [mailto:kimyeung@netvigator.com]=20 Sent: Monday, April 28, 2003 9:20 AM To: linac-eng Subject: Re: Varian pendant coiled cable =09 =09 Hi Colleagues, =20 Varian Clinac C-series =20 Could anyone advise the second source of the coiled cable for Varian's pendant? =20 Does anyone know the detailed procedure for fabrication of coiled cable?=20 =20 Best regards, =20 Kim Yeung=20 ------_=_NextPart_001_01C30D97.D5091B89 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Kim

You can=20 purchase these from Digi-Key here in the USA. Good prices for bulk = purchases and=20 they have various lengths. You can purchase a modular crimp tool in any=20 electronics supply house or catalog. The tool will have a stripper on it = and=20 termination crimper. The only thing to make sure of is to purchase the = right=20 RJ-45 termination, they make one for stranded and one for solid wire. No = magic=20 to it, straight through connection. There'll probably be some discussion = regarding spec's on the cable itself, but I have been using these for = years with=20 good results. The cost is below 10.00 US so it makes replacing=20 them painless.

Tim

-----Original Message-----
From: kim = yeung=20 [mailto:kimyeung@netvigator.com]
Sent: Monday, April 28, = 2003 9:20=20 AM
To: linac-eng
Subject: Re: Varian pendant = coiled=20 cable

Hi Colleagues,

= Varian=20 Clinac C-series

Could anyone advise the second source = of the=20 coiled cable for Varian's pendant?

Does anyone know the detailed = procedure for=20 fabrication of coiled cable?

Best regards,

Kim Yeung =

=00 ------_=_NextPart_001_01C30D97.D5091B89-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 29 01:20:40 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AHvM-0008G2-00; Tue, 29 Apr 2003 01:20:40 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 622991105F5; Tue, 29 Apr 2003 02:14:46 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA24682 for linac-eng-list; Mon, 28 Apr 2003 17:57:47 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from web40712.mail.yahoo.com (web40712.mail.yahoo.com [66.218.78.169]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id RAA24678 for ; Mon, 28 Apr 2003 17:57:45 -0500 (CDT) Message-ID: <20030428225715.77118.qmail@web40712.mail.yahoo.com> Received: from [203.109.249.138] by web40712.mail.yahoo.com via HTTP; Mon, 28 Apr 2003 23:57:15 BST Date: Mon, 28 Apr 2003 23:57:15 +0100 (BST) From: =?iso-8859-1?q?pankaj=20roy?= Subject: Clarificaton about light field(SIEMENS) To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 28 Apr 2003 23:57:15 +0100 (BST) From: =?iso-8859-1?q?pankaj=20roy?= Subject: Clarificaton about light field(SIEMENS) To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net Dear all, As in my previous mail, I mentioned a procedure for radiation/light coincidence, some of you mention these points:- a) The light bulb or mirror do not rotate with the collimator ANSWER:----Exactly, that is the point.---The mirror and lamp are stationary. Please rotate the collimator thru 180 deg, to check if the light coming out is along the mechanical isocenter (of collimator rotation). b) If the jaws are not equidistant from the ZERO ANSWER: Good question.----Well,sorry, I missed to mention in my previous mail. THIS IS IMPORTANT:--- If you have a MECHANICAL FRONTPOINTER, Please mark this point on the PIECE OF PAPER ON THE TABLE, as a starting reference. Then OPEN THE TWO JAWS EQUIDISTANT FROM THIS POINT ( no matter what the field size display is on screen). As somebody else mentioned,THE OTHER METHOD IS:-- One can ensure the bulb is aligned along the mechanical axes by placing a pencil point near the table and projecting the light; if the bulb is not centered, the shadow of the bulb will trace out a circle when the collimator is rotated. Best Regards, Pankaj Roy __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 29 07:34:03 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19ANkh-0000Kx-00; Tue, 29 Apr 2003 07:34:03 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 647FC1105F6 for ; Tue, 29 Apr 2003 08:28:09 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVAI36VZTC8X8E9G@med.uu.nl> for kok@radth.med.uu.nl; Tue, 29 Apr 2003 07:23:46 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVA5OVQ2JQ8WXJD2@med.uu.nl> for kok@radth.med.uu.nl; Tue, 29 Apr 2003 01:26:44 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id QAA23476 for linac-eng-list; Mon, 28 Apr 2003 16:52:44 -0500 (CDT) Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA23472 for ; Mon, 28 Apr 2003 16:52:41 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h3SLqH24013739 for ; Tue, 29 Apr 2003 09:52:19 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Tue, 29 Apr 2003 11:46:11 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Tue, 29 Apr 2003 09:51:44 +1200 Date: Tue, 29 Apr 2003 09:51:41 +1200 From: Dave Pinchin Subject: Re: Varian pendant coiled cable Sender: owner-linac-eng@plato.aristotle.net To: kimyeung@netvigator.com, linac-eng@plato.aristotle.net Message-id: MIME-version: 1.0 X-Mailer: Novell GroupWise Internet Agent 6.0.2 Content-type: text/plain; charset="us-ascii" Content-disposition: inline Content-transfer-encoding: 7bit Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Tue, 29 Apr 2003 09:51:41 +1200 From: Dave Pinchin Subject: Re: Varian pendant coiled cable Sender: owner-linac-eng@plato.aristotle.net To: kimyeung@netvigator.com, linac-eng@plato.aristotle.net Content-disposition: inline X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f G'day, 1/ Varian is currently shipping a new, longer versions of their flat curly cables. 2/ Does any other supplier add a cable strain relief gizmo at the plug ends. We have had remarkable success with the real old (circa 1990), round curly cables and strain reliefs. Dave >>> "kim yeung" 29/04/03 01:19:41 >>> Hi Colleagues, Varian Clinac C-series Could anyone advise the second source of the coiled cable for Varian's pendant? Does anyone know the detailed procedure for fabrication of coiled cable? Best regards, Kim Yeung ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 29 15:59:52 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AVeC-0005vc-00; Tue, 29 Apr 2003 15:59:52 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B26971112F1; Tue, 29 Apr 2003 16:53:52 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA09302 for linac-eng-list; Tue, 29 Apr 2003 08:30:59 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-r07.mx.aol.com (imo-r07.mx.aol.com [152.163.225.103]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA09287 for ; Tue, 29 Apr 2003 08:30:51 -0500 (CDT) From: RSAINC1@aol.com Received: from RSAINC1@aol.com by imo-r07.mx.aol.com (mail_out_v34.22.) id y.158.1eb96cfb (18251) for ; Tue, 29 Apr 2003 09:30:16 -0400 (EDT) Message-ID: <158.1eb96cfb.2bdfd868@aol.com> Date: Tue, 29 Apr 2003 09:30:16 EDT Subject: Siemens Problem Help? To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_158.1eb96cfb.2bdfd868_boundary" X-Mailer: 8.0 for Windows sub 6011 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: RSAINC1@aol.com Date: Tue, 29 Apr 2003 09:30:16 EDT Subject: Siemens Problem Help? To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_158.1eb96cfb.2bdfd868_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit This is a MD-2 accelerator. We are having a check 2 failure, every morning when the machine comes out of warmup. At that time we initiate a check 2 and the readouts come back normal, with the exception of controller 7, which displays 6H. If we turn off power supplies at that time via S31, and re-cycle check 2's pass. Once in awhile we get dose simulator at the end of treatment, which clears by resetting master reset. Any help or advice would be greatly appriciated. R.Wood Pager# 888.849.2775 --part1_158.1eb96cfb.2bdfd868_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable This is a MD-2 accelerator. We are having a chec= k 2 failure, every morning when the machine comes out of warmup. At th= at time we initiate a check 2 and the readouts come back normal, with the ex= ception of controller 7, which displays 6H. If we turn off power suppl= ies at that time via S31, and re-cycle check 2's pass. Once in awhile=20= we get dose simulator at the end of treatment, which clears by resetting mas= ter reset. Any help or advice would be greatly appriciated.
R.Wood
Pager# 888.849.2775 --part1_158.1eb96cfb.2bdfd868_boundary-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 29 16:03:44 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AVhw-0005xd-00; Tue, 29 Apr 2003 16:03:44 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id EBAE81112F1; Tue, 29 Apr 2003 16:57:47 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id IAA09387 for linac-eng-list; Tue, 29 Apr 2003 08:34:23 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail (mail.vll.se [193.10.32.12]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id IAA09381 for ; Tue, 29 Apr 2003 08:34:20 -0500 (CDT) From: magnus.jalmbrant@radfys.umu.se Message-Id: Date: Tue, 29 Apr 2003 15:33:46 +0200 To: paul.twyman@addenbrookes.nhs.uk Cc: linac-eng@plato.aristotle.net Subject: Re: Siemens Primus Y Jaw Overtravel MIME-version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Mailer: TFS Secure Messaging /320000000/460000103/460200035/460820098/ X-Mailer: Version 4.72 Build 101 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA09382 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: magnus.jalmbrant@radfys.umu.se Date: Tue, 29 Apr 2003 15:33:46 +0200 To: paul.twyman@addenbrookes.nhs.uk Cc: linac-eng@plato.aristotle.net Subject: Re: Siemens Primus Y Jaw Overtravel X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA09382 Sender: owner-linac-eng@plato.aristotle.net Ok, thanks for the effort. It was one of the things I was interested to see, if someone else had seen the same problem. Now I can dig a little deeper into this... Bets Regards Magnus J��lmbrant Department of Radiophysics Ume�� University Hospital Sweden ----- Original Message ----- From: "Twyman, Paul" To: Sent: Tuesday, April 29, 2003 11:49 AM Subject: RE: Siemens Primus Y Jaw Overtravel Magnus Following on from my mail yesterday I can confirm that the problem you mention seems to be unique to your machine. None of our three Primus machines exhibit the characteristics you mention. The worst case here was an error of 1.5mm when a Y jaw was set to -10.0. Not much help except that I think you have a problem that is hopefully just a setup error. Regards Paul Twyman MTO5 Medical Physics Dept. Box 152 Addenbrookes Hospital. Hills Rd. Cambridge. CB2 2QQ Tel 01223-586782 Fax 01223 257137 -----Original Message----- From: magnus.jalmbrant@radfys.umu.se [mailto:magnus.jalmbrant@radfys.umu.se] Sent: 28 April 2003 08:13 To: paul.twyman@addenbrookes.nhs.uk; linac-eng@plato.aristotle.net Subject: Re: Siemens Primus Y Jaw Overtravel Ok, I was a little bit messy in my fault description. The problem is getting worse as I am getting closer to -10, to the eye it looks as the light field travels further than expected (i.e. if position -10 is set it looks like it stops on -10.5, so at it��s worst its 5mm). The "fault" is the same for both jaws, and is not present att any positions except for the negative ones. However since the radiation seems to be correct, the problem in a clinical point of view is not too big. The only downside is when the therapists verify the fields before treatment start (compare the fields to the plans) its a bit uncertain for them to know if its OK or not when you can��t trust the fieldlight in negative positions. I have gotten many suggestions about the possible causes to the problem and I will check and verify the ones that I haven��t yet tried. Thought it was an "interesting" fenomena though. Thanks to everyone that has contributed so far. Regards Magnus J��lmbrant Ume�� University Hospital Sweden ----- Original Message ----- From: "Twyman, Paul" To: ; Sent: Friday, April 25, 2003 1:56 PM Subject: RE: Siemens Primus Y Jaw Overtravel Magnus We also have Siemens Primus machines here in Cambridge, UK. In order to understand your problem could you please indicate by how much the light field is 'too small' when the Y jaw is in an overtravel position. I would ask the same question as Chris Forrest - 'Does the problem get progressively worse at you get nearer to -10cm' Are we talking a couple of millimetres or 5mm. I believe that the spec. is 2mm. Paul Twyman MTO5 Medical Physics Dept. Box 152 Addenbrookes Hospital. Hills Rd. Cambridge. CB2 2QQ Tel 01223-586782 Fax 01223 257137 -----Original Message----- From: magnus.jalmbrant@radfys.umu.se [mailto:magnus.jalmbrant@radfys.umu.se] Sent: 23 April 2003 09:18 To: linac-eng@plato.aristotle.net Subject: Siemens Primus Y Jaw Overtravel We have an intresting fenomena that occurs on our Siemens Primus (Klystron) S/N 3559. When we are setting up treatment fields that uses overtravel of the Y Jaws the field-light does not correspond to the radiation. If for example Y1 is set to a postion between 20 and 0, lightfield and radiation matches perfectly. However if position is set between 0 and -10 (ie overtravel) the light field indicates that the Jaw travels to far into the radiation field (ie field size seem to be to small), when checking with film this shows that the radiation corresponds to the set up position but the field-light does not. The same happens for Jaw Y2. Intresting is that the siemens calibration routine for the Y jaws only covers two positions and both is in between 0 and 20 cm (ie 5 & 35 cm fieldsize) field. With "normal" fields field-light size and postions are perfectly ok. Has anyone else seen this "problem"? Ideas to the cause? Regards Magnus J��lmbrant Ume�� University Hospital Sweden 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 29 22:18:42 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AbYo-0007M4-00; Tue, 29 Apr 2003 22:18:42 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 871D71112F1; Tue, 29 Apr 2003 23:12:44 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA18431 for linac-eng-list; Tue, 29 Apr 2003 14:55:29 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from msgia.hs.uab.edu (gw5.uabmc.edu [164.111.37.252]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA18427 for ; Tue, 29 Apr 2003 14:55:24 -0500 (CDT) Received: from INET-MTA by msgia.hs.uab.edu with Novell_GroupWise; Tue, 29 Apr 2003 14:54:53 -0500 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.5.0 Date: Tue, 29 Apr 2003 14:54:46 -0500 From: "Stephen Jordan" To: Subject: 21EX sn 1836 w/ Varis 6.2.19 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 29 Apr 2003 14:54:46 -0500 From: "Stephen Jordan" To: Subject: 21EX sn 1836 w/ Varis 6.2.19 Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net I have an interesting problem I hope the forum can help with: When utilizing PortalVision (vers. 6.1), a MLC Comm Timeout Error is generated. This particular timeout does not occur unless the Portal Vision app is running. Thanks in advance for the help! Steve Jordan UAB Rad Physics 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 29 22:42:09 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AbvV-0007Na-00; Tue, 29 Apr 2003 22:42:09 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 875E11112F1; Tue, 29 Apr 2003 23:36:11 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id PAA19453 for linac-eng-list; Tue, 29 Apr 2003 15:16:59 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from scf.sk.ca (shin.communitynet.ca [216.174.136.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA19448 for ; Tue, 29 Apr 2003 15:16:57 -0500 (CDT) Received: from neried.scf.sk.ca (unverified [172.24.48.3]) by scf.sk.ca (Rockliffe SMTPRA 5.2.4) with SMTP id for ; Tue, 29 Apr 2003 14:16:56 -0600 Received: (from RPC035 [172.24.49.35]) by neried.scf.sk.ca (NAVGW 2.5.2.12) with SMTP id M2003042914162032427 ; Tue, 29 Apr 2003 14:16:20 -0600 From: scot thiesson To: linac-eng@plato.aristotle.net, Scott Mange Date: Tue, 29 Apr 2003 14:16:52 -0600 X-Priority: 3 (Normal) Organization: a.b.c.c. In-Reply-To: <5.1.0.14.0.20030429145545.00a3c0e0@mailhost.det.ameritech.net> Message-Id: <5Y1SM1LHXSXXSSQGFTNC8542WOJSP.3eaeddb4@RPC035> Subject: Re: Varian 1800 Cone Field Size Follow Up MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1252" X-Mailer: Opera 6.0 build 1010 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: scot thiesson To: linac-eng@plato.aristotle.net, Scott Mange Date: Tue, 29 Apr 2003 14:16:52 -0600 X-Priority: 3 (Normal) Organization: a.b.c.c. In-Reply-To: <5.1.0.14.0.20030429145545.00a3c0e0@mailhost.det.ameritech.net> Subject: Re: Varian 1800 Cone Field Size Follow Up Sender: owner-linac-eng@plato.aristotle.net I must admit I have been burnt by this before but more often then not it is the enable key that gets me ... D'oh !!! Scot Thiesson Senior Physics Technician Allan Blair Cancer Centre Regina Saskatchewan Canada 306-766-2286 4/29/2003 1:08:06 PM, Scott Mange wrote: >Dear Engineers, > >I hope I'm not wasting your time with this but thought you might be >interested in knowing how the question about the "red button" turned out. > >When the cones are inserted on the 1800 and the red button pressed, the >jaws move to the position they would have if treating with 12 MeV or higher >(I did not know this at the time). I was used to seeing the jaws at >19x19cm when I put the 15 cone in (correct for 12 MeV) and pressed the red >button and 14x14 for the 10 cone (again for 12 MeV) in the room on the >gantry display. What I hadn't realized was the jaws move to their >treatment position when you mode up the machine. For both the 10 cone and >15 cone with 9MeV, the jaw settings are 20x20. > >When I started with the 15 cone the jaws moved to 19x19. I then switched >cones and forgot to push the red button, the jaws stayed at 19x19 for the >15 cone which was within tolerance for the 9MeV with the 10 cone (20x20 >ideal). I was expecting them to move to 14x14 and its this lack of >movement that set off alarm bells for me. > >My problem was, I got panicky when I realized the jaws weren't at 14x14 for >the 10 cone at that energy. I'd never checked the actual jaw size during >the treatment and this is what caused all the confusion. > >My thanks to everyone who responded. Its certainly been an education for me. > >Scott Mange > Scot Thiesson Senior Physics Technician Allan Blair Cancer Centre Regina Saskatchewan Canada 306-766-2286 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue Apr 29 23:06:44 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AcJI-0007Pc-00; Tue, 29 Apr 2003 23:06:44 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 378211112F1 for ; Wed, 30 Apr 2003 00:00:48 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVBEU9AO7K8XIP72@med.uu.nl> for kok@radth.med.uu.nl; Tue, 29 Apr 2003 22:59:10 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVBEU7KK0Q8X3RRS@med.uu.nl> for kok@radth.med.uu.nl; Tue, 29 Apr 2003 22:59:08 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA17075 for linac-eng-list; Tue, 29 Apr 2003 14:09:00 -0500 (CDT) Received: from 17RADLAPPC01 ([65.174.193.96]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id OAA17071 for ; Tue, 29 Apr 2003 14:08:56 -0500 (CDT) Date: Tue, 29 Apr 2003 15:08:06 -0400 From: Scott Mange Subject: Varian 1800 Cone Field Size Follow Up Sender: owner-linac-eng@plato.aristotle.net X-Sender: smange@mailhost.det.ameritech.net To: linac-eng@plato.aristotle.net Message-id: <5.1.0.14.0.20030429145545.00a3c0e0@mailhost.det.ameritech.net> MIME-version: 1.0 X-Mailer: QUALCOMM Windows Eudora Version 5.1 Content-type: MULTIPART/MIXED; BOUNDARY="Boundary_(ID_PglQYFky33ipDjiDGYBxgA)"; x-avg-checked=avg-ok-255610B0 Precedence: bulk X-GCMulti: 1 X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Tue, 29 Apr 2003 15:08:06 -0400 From: Scott Mange Subject: Varian 1800 Cone Field Size Follow Up Sender: owner-linac-eng@plato.aristotle.net X-Sender: smange@mailhost.det.ameritech.net To: linac-eng@plato.aristotle.net X-GCMulti: 1 X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f --Boundary_(ID_PglQYFky33ipDjiDGYBxgA) Content-type: text/plain; x-avg-checked=avg-ok-255610B0; charset=us-ascii; format=flowed Content-transfer-encoding: 8bit Dear Engineers, I hope I'm not wasting your time with this but thought you might be interested in knowing how the question about the "red button" turned out. When the cones are inserted on the 1800 and the red button pressed, the jaws move to the position they would have if treating with 12 MeV or higher (I did not know this at the time). I was used to seeing the jaws at 19x19cm when I put the 15 cone in (correct for 12 MeV) and pressed the red button and 14x14 for the 10 cone (again for 12 MeV) in the room on the gantry display. What I hadn't realized was the jaws move to their treatment position when you mode up the machine. For both the 10 cone and 15 cone with 9MeV, the jaw settings are 20x20. When I started with the 15 cone the jaws moved to 19x19. I then switched cones and forgot to push the red button, the jaws stayed at 19x19 for the 15 cone which was within tolerance for the 9MeV with the 10 cone (20x20 ideal). I was expecting them to move to 14x14 and its this lack of movement that set off alarm bells for me. My problem was, I got panicky when I realized the jaws weren't at 14x14 for the 10 cone at that energy. I'd never checked the actual jaw size during the treatment and this is what caused all the confusion. My thanks to everyone who responded. Its certainly been an education for me. Scott Mange --Boundary_(ID_PglQYFky33ipDjiDGYBxgA)-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 01:19:59 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AeOF-0007YQ-00; Wed, 30 Apr 2003 01:19:59 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 125DB1112F1; Wed, 30 Apr 2003 02:13:59 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA25804 for linac-eng-list; Tue, 29 Apr 2003 17:57:47 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from web40709.mail.yahoo.com (web40709.mail.yahoo.com [66.218.78.166]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id RAA25800 for ; Tue, 29 Apr 2003 17:57:45 -0500 (CDT) Message-ID: <20030429225714.59959.qmail@web40709.mail.yahoo.com> Received: from [203.109.249.138] by web40709.mail.yahoo.com via HTTP; Tue, 29 Apr 2003 23:57:14 BST Date: Tue, 29 Apr 2003 23:57:14 +0100 (BST) From: =?iso-8859-1?q?pankaj=20roy?= Subject: Re: Siemens Problem Help? To: RSAINC1@aol.com, linac-eng@plato.aristotle.net In-Reply-To: <158.1eb96cfb.2bdfd868@aol.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 29 Apr 2003 23:57:14 +0100 (BST) From: =?iso-8859-1?q?pankaj=20roy?= Subject: Re: Siemens Problem Help? To: RSAINC1@aol.com, linac-eng@plato.aristotle.net In-Reply-To: <158.1eb96cfb.2bdfd868@aol.com> Sender: owner-linac-eng@plato.aristotle.net Two possibilities come to my mind:--- a) Relay K9 in S31 Relay PCB maybe intermittent. ( Bad 24V reset signalling can cause CHECK 2 ) b) If the above doesn't work, try replacing the 8255 ( or 71055)chips on the function controllers 1 and 2. c) Otherwise keep tracking/ monitoring signals (Dose Servo PCB for example) . Best of Luck Pankaj Roy --- RSAINC1@aol.com wrote: > This is a MD-2 accelerator. We are having a check 2 > failure, every morning > when the machine comes out of warmup. At that time > we initiate a check 2 and > the readouts come back normal, with the exception of > controller 7, which > displays 6H. If we turn off power supplies at that > time via S31, and > re-cycle check 2's pass. Once in awhile we get dose > simulator at the end of > treatment, which clears by resetting master reset. > Any help or advice would > be greatly appriciated. > R.Wood > Pager# 888.849.2775 > __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 01:24:02 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AeSA-0007Z6-00; Wed, 30 Apr 2003 01:24:02 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id BC7D71112F1 for ; Wed, 30 Apr 2003 02:18:00 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVBJMHPMU88X2ESQ@med.uu.nl> for kok@radth.med.uu.nl; Wed, 30 Apr 2003 01:16:28 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVBJMFJSVC8Y3HAF@med.uu.nl> for kok@radth.med.uu.nl; Wed, 30 Apr 2003 01:16:25 +0200 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id QAA23879 for linac-eng-list; Tue, 29 Apr 2003 16:39:19 -0500 (CDT) Received: from PHSEXCHICO.MGH.HARVARD.EDU (phsexchico.mgh.harvard.edu [132.183.126.50]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA23874 for ; Tue, 29 Apr 2003 16:39:17 -0500 (CDT) Received: by phsexchico.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id <2JPJ0GAV>; Tue, 29 Apr 2003 17:38:46 -0400 Date: Tue, 29 Apr 2003 17:38:45 -0400 From: "Maddox, Buford J" Subject: RE: FW: Question about Radiation/Light Field Coincidence Sender: owner-linac-eng@plato.aristotle.net To: "'Christopher L. Bartee'" , David.Smith@arh.grampian.scot.nhs.uk Cc: linac-eng@plato.aristotle.net Message-id: <36298D09ED1AD311B4DC0008C7F4D4E10A30F195@phsexch6.partners.org> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_7Sb3x6m/jx0ly6j16X+fLQ)" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Tue, 29 Apr 2003 17:38:45 -0400 From: "Maddox, Buford J" Subject: RE: FW: Question about Radiation/Light Field Coincidence Sender: owner-linac-eng@plato.aristotle.net To: "'Christopher L. Bartee'" , David.Smith@arh.grampian.scot.nhs.uk Cc: linac-eng@plato.aristotle.net X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --Boundary_(ID_7Sb3x6m/jx0ly6j16X+fLQ) Content-type: text/plain; charset="iso-8859-1" If you have coincidence error, is it the light field or the beam which is at fault? Don't want to mask a problem with the beam by adjusting coincidence to compensate. For machines which have a light source that rotates with the collimator tape a ruler to the table and look at its projection on the floor. Adjust the mirror until there is no movement of the projected ruler edges as the collimator is rotated. This guarantees that the (virtual) light source is on the collimator axis of rotation. Then check the coincidence by exposing XTL ready pack film without buildup to 25 mu at isocenter, marking each light field edge twice with one of the push pins used on bulletin boards. (I have found that this exposure gives a field size at 50% density about the same as in water at 10 cm for energies less than 15. You should check this, compare film and a water scan so you have a cross calibration.) If the coincidence is off, then the beam must be off the collimator axis or angled, since the light field is centered. Adjusting the beam angle and position is a job for experts, varies with machine type and mfr. -----Original Message----- From: Christopher L. Bartee [mailto:clbartee@hsc.vcu.edu] Sent: Friday, April 25, 2003 9:35 AM To: David.Smith@arh.grampian.scot.nhs.uk Cc: linac-eng@plato.aristotle.net Subject: Re: FW: Question about Radiation/Light Field Coincidence If you suspect a problem you should expose a film at 90 and 270. This will determine if you have a light field problem or a radiation position problem. Chris Bartee Just a thought, David.Smith@arh.grampian.scot.nhs.uk wrote: -----Original Message----- From: Smith, David Mr Sent: Thursday, April 24, 2003 4:56 PM To: 'Scott Mange' Subject: RE: Question about Radiation/Light Field Coincidence Scott, Portal vision has more or less erradicated the use of film for light field/ X-Ray matching in our department. However a method that we used to use with an ABB machine and an SL75 was to use Kodak Xomat V film set at 100 fsd and mark the light field edges with a pen.We would then expose the film with 60 mu beneath build up of 10 cm for photon energies. We then, in order to get a 50% reference so we could mark the field edges, would expose about 4 cm at the edge of the film with 30 mu. These doses were used because they tended to lie within the linear region of the film response. This reference was then measured using a densitometer. The value obtained was then used to find the edges on the main exposure. We also used the same film as a quick flatness and symmetry check, although the tank is more accurate. Nowadays we use Victoreen's double check for quick checks of flatness and symmetry. I don't know how you would do light field / X-Ray alignment using a water scanner. -----Original Message----- From: Scott Mange [ SMTP:smange@ameritech.net ] Sent: Thursday, April 24, 2003 3:07 PM To: linac-eng@plato.aristotle.net Subject: Question about Radiation/Light Field Coincidence Dear Engineers, Would you please describe for me the process of matching the radiation field and the projected light field? I don't know if there are different procedures for different machines but I'm especially interested in a Varian Clinac 1800. To double check the match I'm been scribing film with a pen and then exposing the film. They match up pretty well at 100cm but at extended SSDs and nearer distances there is a mismatch. I've been told this needs to be done with a water scanner but it seems to me it could be done with film just as easily. Thoughts? Many Thanks, Scott Mange --Boundary_(ID_7Sb3x6m/jx0ly6j16X+fLQ) Content-type: text/html; charset="iso-8859-1"

If you have coincidence error, is it the light field or the beam which is at fault? Don't want to mask a problem with the beam by adjusting coincidence to compensate.

For machines which have a light source that rotates with the collimator tape a ruler to the table and look at its projection on the floor. Adjust the mirror until there is no movement of the projected ruler edges as the collimator is rotated. This guarantees that the (virtual) light source is on the collimator axis of rotation. Then check the coincidence by exposing XTL ready pack film without buildup to 25 mu at isocenter, marking each light field edge twice with one of the push pins used on bulletin boards. (I have found that this exposure gives a field size at 50% density about the same as in water at 10 cm for energies less than 15. You should check this, compare film and a water scan so you have a cross calibration.) If the coincidence is off, then the beam must be off the collimator axis or angled, since the light field is centered. Adjusting the beam angle and position is a job for experts, varies with machine type and mfr.

-----Original Message-----
From: Christopher L. Bartee [mailto:clbartee@hsc.vcu.edu]
Sent: Friday, April 25, 2003 9:35 AM
To: David.Smith@arh.grampian.scot.nhs.uk
Cc: linac-eng@plato.aristotle.net
Subject: Re: FW: Question about Radiation/Light Field Coincidence

If you suspect a problem you should expose a film at 90 and 270. This will determine if you have a light field problem or a radiation position problem.

Chris Bartee
Just a thought,

David.Smith@arh.grampian.scot.nhs.uk wrote:

-----Original Message-----
From:	Smith, David Mr 
Sent:	Thursday, April 24, 2003 4:56 PM
To:	'Scott Mange'
Subject:	RE: Question about Radiation/Light Field Coincidence

Scott,

Portal vision has more or less erradicated the use of film for light
field/ X-Ray matching in our department.

However a method that we used to use with an ABB machine and an SL75 was
to use Kodak Xomat V film set at 100 fsd and mark the light field edges
with a pen.We would then expose the film with 60 mu beneath build up of 10
cm for photon energies. We then, in order to get a 50% reference so we
could mark the field edges, would expose about 4 cm at the edge of the
film with 30 mu. These doses were used because they tended to lie within
the linear region of the film response. This reference was then measured
using a densitometer. The value obtained was then used to find  the edges
on the main exposure. We also used the same film as a quick flatness and
symmetry check, although the tank is more accurate. Nowadays we use
Victoreen's double check for quick checks of  flatness and symmetry. I
don't know how you would do light field / X-Ray alignment using a water
scanner.

-----Original Message-----
From:	Scott Mange [SMTP:smange@ameritech.net]
Sent:	Thursday, April 24, 2003 3:07 PM
To:	linac-eng@plato.aristotle.net
Subject:	Question about Radiation/Light Field Coincidence

Dear Engineers,

Would you please describe for me the process of matching the radiation 
field and the projected light field?  I don't know if there are different 
procedures for different machines but I'm especially interested in a
Varian 
Clinac 1800.

To double check the match I'm been scribing film with a pen and then 
exposing the film.  They match up pretty well at 100cm but at extended
SSDs 
and nearer distances there is a mismatch.

I've been told this needs to be done with a water scanner but it seems to 
me it could be done with film just as easily.

Thoughts?

Many Thanks,
Scott Mange

--Boundary_(ID_7Sb3x6m/jx0ly6j16X+fLQ)-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 02:02:34 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Af3S-0007ba-00; Wed, 30 Apr 2003 02:02:34 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id D091C1112F1 for ; Wed, 30 Apr 2003 02:56:35 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVBKZBJDAO8XBO6J@med.uu.nl> for kok@radth.med.uu.nl; Wed, 30 Apr 2003 01:55:03 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVBKZ9T5LW8Y3HAF@med.uu.nl> for kok@radth.med.uu.nl; Wed, 30 Apr 2003 01:55:01 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA24865 for linac-eng-list; Tue, 29 Apr 2003 17:23:45 -0500 (CDT) Received: from PHSEXCHICI.MGH.HARVARD.EDU (phsexchici.mgh.harvard.edu [132.183.126.51]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA24860 for ; Tue, 29 Apr 2003 17:23:43 -0500 (CDT) Received: by phsexchici.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id <2JPD4PQB>; Tue, 29 Apr 2003 18:23:12 -0400 Date: Tue, 29 Apr 2003 17:35:37 -0400 From: "Maddox, Buford J" Subject: RE: Varian 1800 Cone Field Size Follow Up Sender: owner-linac-eng@plato.aristotle.net To: 'Scott Mange' , linac-eng@plato.aristotle.net Message-id: <36298D09ED1AD311B4DC0008C7F4D4E10A30F194@phsexch6.partners.org> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-type: text/plain; charset="ISO-8859-1" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Tue, 29 Apr 2003 17:35:37 -0400 From: "Maddox, Buford J" Subject: RE: Varian 1800 Cone Field Size Follow Up Sender: owner-linac-eng@plato.aristotle.net To: 'Scott Mange' , linac-eng@plato.aristotle.net X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This reminds me of a similar situation on the 2100, where the jaws may not move in service mode under some conditions, causing a calibration error. Only in service mode. See the CTBs on Varian web site: Varian.com/support -----Original Message----- From: Scott Mange [mailto:smange@ameritech.net] Sent: Tuesday, April 29, 2003 3:08 PM To: linac-eng@plato.aristotle.net Subject: Varian 1800 Cone Field Size Follow Up Dear Engineers, I hope I'm not wasting your time with this but thought you might be interested in knowing how the question about the "red button" turned out. When the cones are inserted on the 1800 and the red button pressed, the jaws move to the position they would have if treating with 12 MeV or higher (I did not know this at the time). I was used to seeing the jaws at 19x19cm when I put the 15 cone in (correct for 12 MeV) and pressed the red button and 14x14 for the 10 cone (again for 12 MeV) in the room on the gantry display. What I hadn't realized was the jaws move to their treatment position when you mode up the machine. For both the 10 cone and 15 cone with 9MeV, the jaw settings are 20x20. When I started with the 15 cone the jaws moved to 19x19. I then switched cones and forgot to push the red button, the jaws stayed at 19x19 for the 15 cone which was within tolerance for the 9MeV with the 10 cone (20x20 ideal). I was expecting them to move to 14x14 and its this lack of movement that set off alarm bells for me. My problem was, I got panicky when I realized the jaws weren't at 14x14 for the 10 cone at that energy. I'd never checked the actual jaw size during the treatment and this is what caused all the confusion. My thanks to everyone who responded. Its certainly been an education for me. Scott Mange 1,, X-Coding-System: emacs-mule-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 02:14:39 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AfF9-0007d1-00; Wed, 30 Apr 2003 02:14:39 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B1BBF1112F1; Wed, 30 Apr 2003 03:08:39 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id SAA26957 for linac-eng-list; Tue, 29 Apr 2003 18:54:22 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from adl0133.systems.sa.gov.au (adl0133.systems.sa.gov.au [143.216.236.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id SAA26953 for ; Tue, 29 Apr 2003 18:54:20 -0500 (CDT) Received: from adl0133.systems.sa.gov.au (localhost [127.0.0.1]) by adl0133.systems.sa.gov.au OUTGOING (8.12.9/8.12.7) with ESMTP id h3TNrlV6003859 for ; Wed, 30 Apr 2003 09:23:47 +0930 (CST)' Received: from rahsun153.rah.sa.gov.au (mailhub.rah.sa.gov.au [10.19.241.188]) by adl0133.systems.sa.gov.au INCOMING (8.12.9/8.12.7) with ESMTP id h3TNrlAt003850 for ; Wed, 30 Apr 2003 09:23:47 +0930 (CST)' Received: from mail.rah.sa.gov.au (sagraha01 [10.19.241.136]) by rahsun153.rah.sa.gov.au (8.12.9/8.12.8) with ESMTP id h3TNrluK023476 for ; Wed, 30 Apr 2003 09:23:47 +0930 (CST) Message-Id: <200304292353.h3TNrluK023476@rahsun153.rah.sa.gov.au> Received: from SAGRAHA01/SpoolDir by mail.rah.sa.gov.au (Mercury 1.48); 30 Apr 03 09:23:47 +0930 Received: from SpoolDir by SAGRAHA01 (Mercury 1.48); 30 Apr 03 09:23:18 +0930 From: "Andrew Frolov" Organization: Royal Adelaide Hospital To: linac-eng@plato.aristotle.net Date: Wed, 30 Apr 2003 09:22:23 +0930 MIME-Version: 1.0 Content-type: text/enriched; charset=ISO-8859-1 Content-transfer-encoding: 8bit Subject: Re: Siemens Problem Help? In-reply-to: <158.1eb96cfb.2bdfd868@aol.com> X-mailer: Pegasus Mail for Win32 (v3.12a) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Andrew Frolov" Organization: Royal Adelaide Hospital To: linac-eng@plato.aristotle.net Date: Wed, 30 Apr 2003 09:22:23 +0930 Subject: Re: Siemens Problem Help? In-reply-to: <158.1eb96cfb.2bdfd868@aol.com> Sender: owner-linac-eng@plato.aristotle.net From: RSAINC1@aol.com Date sent: Tue, 29 Apr 2003 09:30:16 EDT Subject: Siemens Problem Help? To: linac-eng@plato.aristotle.net 0000,0000,7F00> This is a MD-2 accelerator. We are having a check 2 failure, every morning > when the machine comes out of warmup. At that time we initiate a check 2 and > the readouts come back normal, with the exception of controller 7, which > displays 6H. If we turn off power supplies at that time via S31, and > re-cycle check 2's pass. Once in awhile we get dose simulator at the end of > treatment, which clears by resetting master reset. Any help or advice would ] > be greatly appriciated. > R.Wood > Pager# 888.849.2775 > Error 6H (02+04) for controller 7 means it fails two tests: 0100,0100,0100Times New Roman02 - Supervisor turnoff test by Dose 2 failed 04 - Supervisor release for turnoff test failed Arial CyrI have been through a lot of troubleshooting of these FCs in the past. Here some tips from my archive. And remember - 90% of FC problems are solved by replacing PIOP chips on the board. Also keep in mind that it is not always the controller reporting error is unhealthy. It is more likely to be one of the others. ERROR display + CHECK#2 failure If ERROR display appears it is usually due to failure of either CHECK#1 or #2. Go to check screen and try the check again. The important thing at this stage is to try moving cursor between controllers and see if it helps pass the check. If the machine does not pass the check only with one controller highlighted it is most likely that this controller is faulty. Replace it. Otherwise read the error code and try to localise the fault. An error code reported by a function controller usually but not necessarily means that this particular controller s healthy and it reports a fault of another one. If reported error does not make very much sense override CHECK#2 and program an energy. The machine may bring up some interlocks. Check codes for those and see if it gives you an additional information. Go inside treatment room, get an assistant to lock the door and check a status of supervisor lines LEDs on logic control board PC5 S34. But before make sure the interlock chain is complete, otherwise the interlock controller will pull those lines up and this is not a fault condition. If a supervisor LED is on, another circuit on this board will detect the controller to blame. But our experience showed that it is not always correct. The better practice is to survey and analyze status and behaviour of all supervisor lines from each controller both when an energy is programmed and during CHECK#2 routine. Also check the status of T1 line (there are red LEDs on I/O relay and HC-Interface3 boards). If it is on it may be due to watchdog test failure on one of the controllers. In this case an LED on HC-Interface 3 (those LEDs are not on the edge of the board) will tell you which controller is sick. Hope this will help. Regards, Andrew Frolov Manager, Radiation Engineering Medical Physics Royal Adelaide Hospital Tel: 61 8 8222 5674 Fax: 61 8 8222 5937 email afrolov@mail.rah.sa.gov.au 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 02:59:01 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Afw4-0007fY-00; Wed, 30 Apr 2003 02:59:00 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 52E931112F1; Wed, 30 Apr 2003 03:53:01 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id TAA27865 for linac-eng-list; Tue, 29 Apr 2003 19:38:21 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from clift.nettas.net (clift.nettas.net [202.7.15.71]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id TAA27860 for ; Tue, 29 Apr 2003 19:38:18 -0500 (CDT) Received: from dchs6202.dchs.tas.gov.au (exch.dchs.tas.gov.au [147.109.65.6]) by clift.nettas.net (8.12.7/8.12.7) with ESMTP id h3U0deGV007902 for ; Wed, 30 Apr 2003 10:39:40 +1000 (EST) Received: by exch.dchs.tas.gov.au with Internet Mail Service (5.5.2655.55) id ; Wed, 30 Apr 2003 10:38:00 +1000 Message-ID: From: Johnson Glenn To: "LINAC_ENGINEERS (E-mail)" Subject: 600C S/N 298 Flow Date: Wed, 30 Apr 2003 10:37:59 +1000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Johnson Glenn To: "LINAC_ENGINEERS (E-mail)" Subject: 600C S/N 298 Flow Date: Wed, 30 Apr 2003 10:37:59 +1000 Sender: owner-linac-eng@plato.aristotle.net G'Day, I'm getting a FLOW I/L (consistently), when the gantry is 180 VARIAN (head down), and only during BEAM ON. Its tripping the 2 GPM flow switch inline with GUIDE / RF LOAD. I've changed flow switch and ALL inline flex hosing, and the fault is still there. I measured the flow rate from the output side of the flow switch, its 2.2 imperial GPM : 2.6 US GPM. I've since measured flow from the supply manifold, (input side of GUIDE), its 7.4 US GPM. Coming out from the GUIDE is only 3.2 US GPM !! I'm wondering if there is a natural flow restriction, internally in the guide. Or, should I get out what I put in. The other case is some foreign buildup. I've tried backflushing. I'd appreciate some feedback, if anyones been down this track before. Ta, Glenn Johnson Radiation Engineer WP Holman Clinic Royal Hobart Hospital ph: 03 6223 4000 mob: 0408 136 906 glenn.johnson@dhhs.tas.gov.au 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 04:48:21 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Ahdt-0007nJ-00; Wed, 30 Apr 2003 04:48:21 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 179281112F2; Wed, 30 Apr 2003 05:42:22 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id VAA04215 for linac-eng-list; Tue, 29 Apr 2003 21:21:32 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from smtp-out.comcast.net (smtp-out.comcast.net [24.153.64.115]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id VAA04211 for ; Tue, 29 Apr 2003 21:21:31 -0500 (CDT) Received: from tjf733 (bgp603500bgs.midltn01.nj.comcast.net [68.39.62.248]) by mtaout02.icomcast.net (iPlanet Messaging Server 5.2 HotFix 1.12 (built Feb 13 2003)) with SMTP id <0HE4008HXX4JUS@mtaout02.icomcast.net> for linac-eng@plato.aristotle.net; Tue, 29 Apr 2003 22:19:32 -0400 (EDT) Date: Tue, 29 Apr 2003 22:19:35 -0400 From: tjfox Subject: RE: Siemens Problem Help? In-reply-to: <20030429225714.59959.qmail@web40709.mail.yahoo.com> To: pankaj roy , RSAINC1@aol.com, linac-eng@plato.aristotle.net Message-id: MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT Importance: Normal X-Priority: 3 (Normal) X-MSMail-priority: Normal Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 29 Apr 2003 22:19:35 -0400 From: tjfox Subject: RE: Siemens Problem Help? In-reply-to: <20030429225714.59959.qmail@web40709.mail.yahoo.com> To: pankaj roy , RSAINC1@aol.com, linac-eng@plato.aristotle.net X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 Importance: Normal X-Priority: 3 (Normal) X-MSMail-priority: Normal Sender: owner-linac-eng@plato.aristotle.net I agree with Pankaj Roy (below). You can easily simulate one possible cause of the ERROR Check 2 fault. Hold the 24 volt reset button down and run the Check Display test. It will give the same result (controller 7 - 6Hex). I don't know the relay's name, but it is the Yellow cased Tiem delay 24 volt reset relay - in the S31 - that fails. It's a fairly common failure. Try that first. Let us know. Tom Fox -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of pankaj roy Sent: Tuesday, April 29, 2003 6:57 PM To: RSAINC1@aol.com; linac-eng@plato.aristotle.net Subject: Re: Siemens Problem Help? Two possibilities come to my mind:--- a) Relay K9 in S31 Relay PCB maybe intermittent. ( Bad 24V reset signalling can cause CHECK 2 ) b) If the above doesn't work, try replacing the 8255 ( or 71055)chips on the function controllers 1 and 2. c) Otherwise keep tracking/ monitoring signals (Dose Servo PCB for example) . Best of Luck Pankaj Roy --- RSAINC1@aol.com wrote: > This is a MD-2 accelerator. We are having a check 2 > failure, every morning > when the machine comes out of warmup. At that time > we initiate a check 2 and > the readouts come back normal, with the exception of > controller 7, which > displays 6H. If we turn off power supplies at that > time via S31, and > re-cycle check 2's pass. Once in awhile we get dose > simulator at the end of > treatment, which clears by resetting master reset. > Any help or advice would > be greatly appriciated. > R.Wood > Pager# 888.849.2775 > __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 06:04:42 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Aipm-0007sk-00; Wed, 30 Apr 2003 06:04:42 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2A4D51112F7; Wed, 30 Apr 2003 06:58:44 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id WAA05971 for linac-eng-list; Tue, 29 Apr 2003 22:40:49 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from adl0133.systems.sa.gov.au (adl0133.systems.sa.gov.au [143.216.236.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id WAA05966 for ; Tue, 29 Apr 2003 22:40:45 -0500 (CDT) Received: from adl0133.systems.sa.gov.au (localhost [127.0.0.1]) by adl0133.systems.sa.gov.au OUTGOING (8.12.9/8.12.7) with ESMTP id h3U3eDV6013848 for ; Wed, 30 Apr 2003 13:10:13 +0930 (CST)' Received: from rahsun153.rah.sa.gov.au (mailhub.rah.sa.gov.au [10.19.241.188]) by adl0133.systems.sa.gov.au INCOMING (8.12.9/8.12.7) with ESMTP id h3U3eDAt013830 for ; Wed, 30 Apr 2003 13:10:13 +0930 (CST)' Received: from mail.rah.sa.gov.au (sagraha01 [10.19.241.136]) by rahsun153.rah.sa.gov.au (8.12.9/8.12.8) with ESMTP id h3U3eCuO009546 for ; Wed, 30 Apr 2003 13:10:12 +0930 (CST) Message-Id: <200304300340.h3U3eCuO009546@rahsun153.rah.sa.gov.au> Received: from SAGRAHA01/SpoolDir by mail.rah.sa.gov.au (Mercury 1.48); 30 Apr 03 13:10:12 +0930 Received: from SpoolDir by SAGRAHA01 (Mercury 1.48); 30 Apr 03 13:09:42 +0930 From: "Andrew Frolov" Organization: Royal Adelaide Hospital To: linac-eng@plato.aristotle.net Date: Wed, 30 Apr 2003 13:09:15 +0930 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: RE: Siemens Problem Help? References: <20030429225714.59959.qmail@web40709.mail.yahoo.com> In-reply-to: X-mailer: Pegasus Mail for Win32 (v3.12a) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Andrew Frolov" Organization: Royal Adelaide Hospital To: linac-eng@plato.aristotle.net Date: Wed, 30 Apr 2003 13:09:15 +0930 Subject: RE: Siemens Problem Help? In-reply-to: Sender: owner-linac-eng@plato.aristotle.net Yes, we had the problem with that relay in the past as well. The only difference was that it came up with Controller #6 Error 02H. And it could not be cleared by re-powering S31 as the relay was stuck permanently. Date sent: Tue, 29 Apr 2003 22:19:35 -0400 From: tjfox Subject: RE: Siemens Problem Help? To: pankaj roy , RSAINC1@aol.com, linac-eng@plato.aristotle.net > I agree with Pankaj Roy (below). > > You can easily simulate one possible cause of the ERROR Check 2 fault. Hold > the 24 volt reset button down and run the Check Display test. It will give > the same result (controller 7 - 6Hex). I don't know the relay's name, but it > is the Yellow cased Tiem delay 24 volt reset relay - in the S31 - that > fails. It's a fairly common failure. Try that first. > > Let us know. > > Tom Fox > > -----Original Message----- > From: owner-linac-eng@plato.aristotle.net > [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of pankaj roy > Sent: Tuesday, April 29, 2003 6:57 PM > To: RSAINC1@aol.com; linac-eng@plato.aristotle.net > Subject: Re: Siemens Problem Help? > > > Two possibilities come to my mind:--- > > a) Relay K9 in S31 Relay PCB maybe intermittent. > ( Bad 24V reset signalling can cause CHECK 2 ) > > b) If the above doesn't work, try replacing the > 8255 ( or 71055)chips on the function controllers > > 1 and 2. > c) Otherwise keep tracking/ monitoring signals (Dose > Servo PCB for example) . > > Best of Luck > > Pankaj Roy > > > > > --- RSAINC1@aol.com wrote: > This is a MD-2 > accelerator. We are having a check 2 > > failure, every morning > > when the machine comes out of warmup. At that time > > we initiate a check 2 and > > the readouts come back normal, with the exception of > > controller 7, which > > displays 6H. If we turn off power supplies at that > > time via S31, and > > re-cycle check 2's pass. Once in awhile we get dose > > simulator at the end of > > treatment, which clears by resetting master reset. > > Any help or advice would > > be greatly appriciated. > > R.Wood > > Pager# 888.849.2775 > > > > __________________________________________________ > Yahoo! Plus > For a better Internet experience > http://www.yahoo.co.uk/btoffer > Andrew Frolov Manager, Radiation Engineering Medical Physics Royal Adelaide Hospital Tel: 61 8 8222 5674 Fax: 61 8 8222 5937 email afrolov@mail.rah.sa.gov.au 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 17:41:07 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Athj-0000VY-00; Wed, 30 Apr 2003 17:41:07 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id DECD61112F1; Wed, 30 Apr 2003 18:35:05 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA16995 for linac-eng-list; Wed, 30 Apr 2003 10:09:20 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail.cbdha.nshealth.ca (mail.cbdha.nshealth.ca [142.176.129.245]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA16991 for ; Wed, 30 Apr 2003 10:09:18 -0500 (CDT) Received: from ([128.222.7.122]) by mail.cbdha.nshealth.ca (Merak 4.2.3) with SMTP id LPA73855 for ; Wed, 30 Apr 2003 12:12:43 -0300 From: "Greg MacKinnon" To: "LinacEng" Subject: Great Software Package Date: Wed, 30 Apr 2003 12:08:53 -0300 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Greg MacKinnon" To: "LinacEng" Subject: Great Software Package Date: Wed, 30 Apr 2003 12:08:53 -0300 X-Priority: 3 (Normal) X-MSMail-Priority: Normal Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Hi Group If anyone is interested, I have found a software package that is designed for in house engineers. It gives the in house engineer a total package for maintaining service records, parts & suppliers. Our clinic is totally pleased with both the software abilities and the service it gets. We are able to import our existing Access databases into the new software so nothing was lost and I was able to send the company our hospital logo, etc and have them incorporate it into the software before developing it at no extra cost. It is an affordable price for all it offers and can be purchased in modules rather than a complete package. This enables you to purchase only what you want or need. (Service Report Module, Parts Module, and Reports Module) They can be purchased individually or as a discounted package all at once. Each additional module integrates seamlessly into the main Service Report software. It serves as a great troubleshooting aid as well, as the search capabilities are great. If your looking for a complete package for your clinic then you can find contact information at the following link: http://home.attbi.com/~j.yorke/boa.html Thanks Greg __________________________________________ Greg MacKinnon, C.E.T. Linear Accelerator Service Technologist Cape Breton Cancer Centre 1482 George Street Sydney, Nova Scotia, Canada B1P 1P3 tel: (902) 567-8076 fax: (902) 567-8075 email: mackinnongreg@cbdha.nshealth.ca 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 18:29:31 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AuSZ-0000dL-00; Wed, 30 Apr 2003 18:29:31 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B2EB01112F1; Wed, 30 Apr 2003 19:23:29 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id LAA18678 for linac-eng-list; Wed, 30 Apr 2003 11:00:45 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id LAA18666 for ; Wed, 30 Apr 2003 11:00:42 -0500 (CDT) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Wed, 30 Apr 2003 12:59:04 -0300 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Date: Wed, 30 Apr 2003 12:58:58 -0300 From: "David Burgess" To: Subject: Elaborate water study Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=_D38C4FD8.F9987B8A" X-Guinevere: 1.1.14 ; Nova Scotia Hospital Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 30 Apr 2003 12:58:58 -0300 From: "David Burgess" To: Subject: Elaborate water study X-Guinevere: 1.1.14 ; Nova Scotia Hospital Sender: owner-linac-eng@plato.aristotle.net --=_D38C4FD8.F9987B8A Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable I'm part of a small group starting a detailed water analysis study on = Varian Clinacs. The study purpose is to ensure copper and other machine losses are now = minimized.=20 The study might include a water chemical analysis, hose deteriation/longevi= ty, sacrificial electrodes, biological slime content, machine run time vs = losses per hour, galvanic conduction and repair cost vs losses. Is there anything else from your experiences that you feel we should = include ? I hope other clinics might be interested in contributing any info or = analysis data they have. In Eastern Canada a new machine will soon start up with the water = additive. Other machines here are using RO water and flushing at different = intervals. There is a mix of LEs and HEs. We also have a 8 year old 2100C with new guide sled and new Bending = magnet. The study duration will be 3 years, with interim reports available to = interested parties. The final report will probably be presented as a paper = to some physics/service gathering. David Burgess Nova Scotia Cancer Centre Halifax, Canada This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. --=_D38C4FD8.F9987B8A Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

I'm part of a small group = starting a=20 detailed water analysis study on Varian Clinacs.

The study purpose is to = ensure copper=20 and other machine losses are now minimized.

The study might include a = water=20 chemical analysis, hose deteriation/longevity, sacrificial electrodes,=20 biological slime content, machine run time vs losses per hour, galvanic=20 conduction and repair cost vs losses.

Is there anything else from = your=20 experiences that you feel we should include ?

I hope other clinics might = be=20 interested in contributing any info or analysis data they=20 have.

In Eastern Canada a new = machine=20 will soon start up with the water additive. Other machines here are using = RO=20 water and flushing at different intervals. There is a mix of LEs and=20 HEs.

We also have a 8 year old = 2100C with=20 new guide sled and new Bending magnet.

The study duration will be 3 = years,=20 with interim reports available to interested parties. The final report = will=20 probably be presented as a paper to some physics/service gathering.<= /DIV>

David Burgess

Nova Scotia Cancer Centre

Halifax, Canada

--=_D38C4FD8.F9987B8A-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 19:33:17 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AvSG-0000j5-00; Wed, 30 Apr 2003 19:33:17 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E3C311112F1; Wed, 30 Apr 2003 20:27:12 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA20490 for linac-eng-list; Wed, 30 Apr 2003 12:09:55 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsm030.netvigator.com (imsm030.netvigator.com [218.102.48.148]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id MAA20485 for ; Wed, 30 Apr 2003 12:09:53 -0500 (CDT) Received: (qmail 28694 invoked from network); 30 Apr 2003 17:09:37 -0000 Received: from n218103166051.netvigator.com (HELO kyeung) (218.103.166.51) by imsm030.netvigator.com with SMTP; 30 Apr 2003 17:09:37 -0000 Message-ID: <002e01c30f3b$46b72280$7e09fea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: Varian EDW termination at wrong position Date: Thu, 1 May 2003 01:09:35 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01C30F7E.54AFA900" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: Varian EDW termination at wrong position Date: Thu, 1 May 2003 01:09:35 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_002B_01C30F7E.54AFA900 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, =20 Varian Clinac, 2300CD & 600CD Version 6.1 We had several reports of wrong position termination of EDW on our = 2300CD and 600CD. In these incidents, the moving jaw stopped about 1cm = before its designated position (i.e. at 1.4cm instead of 0.5cm) and the = MU was okay, the Clinac did not show any interlocks. The EDW log showed = the treatment was complete in normal way, the moving jaw stopped at = 0.48cm, i.e. within MU and position tolerances. Does anyone have such experience before? Could anyone advise the following:- 1. The sampling mechanism of the dynamic log; 2. The tripping nature of DPSN; and 3. EDW termination mechanism. Thanks in advance. Kim Yeung ------=_NextPart_000_002B_01C30F7E.54AFA900 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

Varian Clinac, = 2300CD &=20 600CD Version 6.1

We had several reports of wrong = position=20 termination of EDW on our 2300CD and 600CD. In these incidents, the = moving jaw=20 stopped about 1cm before its designated position (i.e. at 1.4cm = instead of=20 0.5cm) and the MU was okay, the Clinac did not show any=20 interlocks. The EDW log showed the treatment was complete in normal way, the = moving=20 jaw stopped at 0.48cm, i.e. within MU and position = tolerances.

Does anyone have such experience=20 before?

Could anyone advise the = following:-

1. The sampling mechanism of the = dynamic=20 log;

2. The tripping nature of DPSN; = and

3. EDW termination = mechanism.

Thanks in advance.

Kim Yeung

------=_NextPart_000_002B_01C30F7E.54AFA900-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 20:23:35 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AwEx-0000mh-00; Wed, 30 Apr 2003 20:23:35 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id BA8021112F1; Wed, 30 Apr 2003 21:17:31 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA21684 for linac-eng-list; Wed, 30 Apr 2003 12:57:21 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from TC00TECPRO00015.ssss.gouv.qc.ca (mail2.ssss.gouv.qc.ca [199.243.239.24]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA21680 for ; Wed, 30 Apr 2003 12:57:18 -0500 (CDT) From: normand_freniere_chrtr@ssss.gouv.qc.ca Received: from mail.ssss.gouv.qc.ca (tc00tecpro00009.ssss.gouv.qc.ca [10.250.32.14]) by TC00TECPRO00015.ssss.gouv.qc.ca (AIX4.3/8.9.3/8.9.3) with ESMTP id NAA206680; Wed, 30 Apr 2003 13:34:12 -0400 Subject: =?iso-8859-1?Q?R=E9f=2E_=3A_21EX_sn_1836_w=2F_Varis_6=2E2=2E19?= To: linac-eng@plato.aristotle.net Cc: "Stephen Jordan" Date: Wed, 30 Apr 2003 13:59:56 -0400 Message-ID: X-MIMETrack: Serialize by Router on TC00TECPRO00009/Serveurs/SSSS(5012HF14 | April 04, 2003) at 04/30/2003 01:55:41 PM MIME-Version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id MAA21681 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: normand_freniere_chrtr@ssss.gouv.qc.ca Subject: =?iso-8859-1?Q?R=E9f=2E_=3A_21EX_sn_1836_w=2F_Varis_6=2E2=2E19?= To: linac-eng@plato.aristotle.net Cc: "Stephen Jordan" Date: Wed, 30 Apr 2003 13:59:56 -0400 X-MIMETrack: Serialize by Router on TC00TECPRO00009/Serveurs/SSSS(5012HF14 | April 04, 2003) at 04/30/2003 01:55:41 PM X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id MAA21681 Sender: owner-linac-eng@plato.aristotle.net Steve, We did also get MLC Comm Timeout Error, but with Varis Treatment 6.2.27 (Portal Vision 6.1 app is also always running in the background). We get the error message for fields which have not portal scheduled. Unfortunately, we could not help you on an explanation and/or solution ... We are unable to reproduce the problem. It happens unpredictably. Varian is aware of the behavior, but because it can not be reproduce ... it is hard for everyone to trouble shoot. We also hope the forum can help! Normand Freni��re, M.Sc., MCCPM Medical physicist Centre Hospitalier R��gional de Trois-Rivi��res Radio-oncologie 1991 boul. du Carmel Trois-Rivi��res Qc G8Z 3R9 Courriel : normand_freniere_chrtr@ssss.gouv.qc.ca "Stephen Jordan" @plato.aristotle.net le 29/04/2003 03:54:46 PM Envoy�� par : owner-linac-eng@plato.aristotle.net Pour : cc : Objet : 21EX sn 1836 w/ Varis 6.2.19 I have an interesting problem I hope the forum can help with: When utilizing PortalVision (vers. 6.1), a MLC Comm Timeout Error is generated. This particular timeout does not occur unless the Portal Vision app is running. Thanks in advance for the help! Steve Jordan UAB Rad Physics 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 20:59:01 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AwnF-0000qF-00; Wed, 30 Apr 2003 20:59:01 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 807A31112F3; Wed, 30 Apr 2003 21:52:57 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id NAA22501 for linac-eng-list; Wed, 30 Apr 2003 13:27:27 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from bajor.cancercare.on.ca ([142.76.1.63]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id NAA22497 for ; Wed, 30 Apr 2003 13:27:24 -0500 (CDT) Received: by bajor.tsrcc.on.ca with Internet Mail Service (5.5.2653.19) id ; Wed, 30 Apr 2003 08:33:27 -0400 Message-ID: <4631AA4F502ED711AE0700A0C9EBCF2964F56A@bajor.tsrcc.on.ca> From: "Rozenblat, Alex" To: "'RSAINC1@aol.com'" , linac-eng@plato.aristotle.net Subject: RE: Siemens Problem Help? Date: Wed, 30 Apr 2003 08:33:23 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Rozenblat, Alex" To: "'RSAINC1@aol.com'" , linac-eng@plato.aristotle.net Subject: RE: Siemens Problem Help? Date: Wed, 30 Apr 2003 08:33:23 -0400 Sender: owner-linac-eng@plato.aristotle.net Hi, It seems to me that you have a trouble with + 24V line and most likely your relay K9 (area 31) is bad because it does not reset + 24V line as it is supposed to do. Concentrate in this area (could be that one diode protecting this line is busted). One more hint: check LEDs on watchdog, which correspond to every Slave. Could be that Slave 7 reports properly and a problem comes from different Slave. Good luck, Alex Rozenblat TSRCC, Toronto -----Original Message----- From: RSAINC1@aol.com [mailto:RSAINC1@aol.com] Sent: 29 April 2003 09:30 To: linac-eng@plato.aristotle.net Subject: Siemens Problem Help? This is a MD-2 accelerator. We are having a check 2 failure, every morning when the machine comes out of warmup. At that time we initiate a check 2 and the readouts come back normal, with the exception of controller 7, which displays 6H. If we turn off power supplies at that time via S31, and re-cycle check 2's pass. Once in awhile we get dose simulator at the end of treatment, which clears by resetting master reset. Any help or advice would be greatly appriciated. R.Wood Pager# 888.849.2775 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 21:51:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AxcH-0000vG-00; Wed, 30 Apr 2003 21:51:45 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 219601112F1; Wed, 30 Apr 2003 22:45:42 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA24406 for linac-eng-list; Wed, 30 Apr 2003 14:20:09 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dangerfield.cancercare.mb.ca (dangerfield.cancercare.mb.ca [192.139.125.101]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA24402 for ; Wed, 30 Apr 2003 14:20:07 -0500 (CDT) Received: (from uucp@localhost) by dangerfield.cancercare.mb.ca (8.11.6+Sun/8.11.6) id h3UJK1Q28774 for ; Wed, 30 Apr 2003 14:20:01 -0500 (CDT) Received: from UNKNOWN(172.18.125.27), claiming to be "chaos.cancercare.mb.ca" via SMTP by dangerfield, id smtpdAAAcma473; Wed Apr 30 19:15:41 2003 Received: from CCMD01-MTA by chaos.cancercare.mb.ca with Novell_GroupWise; Wed, 30 Apr 2003 14:15:43 -0500 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Wed, 30 Apr 2003 14:15:24 -0500 From: "Ken Allen" To: Subject: Siemens Hand Control Membranes Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 30 Apr 2003 14:15:24 -0500 From: "Ken Allen" To: Subject: Siemens Hand Control Membranes Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Hello List Does anyone have a source for the Siemens A69 style hand control membrane? Any info would be appreciated. Ken Allen CancerCare Manitoba Winnipeg, Manitoba, Canada 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed Apr 30 23:50:22 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19AzT4-00013Q-00; Wed, 30 Apr 2003 23:50:22 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2AC0B1112F1; Thu, 1 May 2003 00:44:19 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id QAA29266 for linac-eng-list; Wed, 30 Apr 2003 16:27:20 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICI2.Partners.org (phsexchici2.partners.org [170.223.254.21]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA29262 for ; Wed, 30 Apr 2003 16:27:18 -0500 (CDT) Received: by phsexchici2.partners.org with Internet Mail Service (5.5.2655.55) id ; Wed, 30 Apr 2003 17:26:47 -0400 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F197@phsexch6.partners.org> From: "Maddox, Buford J" To: "'normand_freniere_chrtr@ssss.gouv.qc.ca'" , linac-eng@plato.aristotle.net Cc: Stephen Jordan Subject: =?iso-8859-1?Q?RE=3A_R=E9f=2E_=3A_21EX_sn_1836_w/_Varis_6=2E2=2E?= =?iso-8859-1?Q?19?= Date: Wed, 30 Apr 2003 17:26:47 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id QAA29263 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'normand_freniere_chrtr@ssss.gouv.qc.ca'" , linac-eng@plato.aristotle.net Cc: Stephen Jordan Subject: =?iso-8859-1?Q?RE=3A_R=E9f=2E_=3A_21EX_sn_1836_w/_Varis_6=2E2=2E?= =?iso-8859-1?Q?19?= Date: Wed, 30 Apr 2003 17:26:47 -0400 X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id QAA29263 Sender: owner-linac-eng@plato.aristotle.net We have experienced some timeout errors on a networked MLC when the network is hitting it too often, keeping the PC busy. -----Original Message----- From: normand_freniere_chrtr@ssss.gouv.qc.ca [mailto:normand_freniere_chrtr@ssss.gouv.qc.ca] Sent: Wednesday, April 30, 2003 2:00 PM To: linac-eng@plato.aristotle.net Cc: Stephen Jordan Subject: R��f. : 21EX sn 1836 w/ Varis 6.2.19 Steve, We did also get MLC Comm Timeout Error, but with Varis Treatment 6.2.27 (Portal Vision 6.1 app is also always running in the background). We get the error message for fields which have not portal scheduled. Unfortunately, we could not help you on an explanation and/or solution ... We are unable to reproduce the problem. It happens unpredictably. Varian is aware of the behavior, but because it can not be reproduce ... it is hard for everyone to trouble shoot. We also hope the forum can help! Normand Freni��re, M.Sc., MCCPM Medical physicist Centre Hospitalier R��gional de Trois-Rivi��res Radio-oncologie 1991 boul. du Carmel Trois-Rivi��res Qc G8Z 3R9 Courriel : normand_freniere_chrtr@ssss.gouv.qc.ca "Stephen Jordan" @plato.aristotle.net le 29/04/2003 03:54:46 PM Envoy�� par : owner-linac-eng@plato.aristotle.net Pour : cc : Objet : 21EX sn 1836 w/ Varis 6.2.19 I have an interesting problem I hope the forum can help with: When utilizing PortalVision (vers. 6.1), a MLC Comm Timeout Error is generated. This particular timeout does not occur unless the Portal Vision app is running. Thanks in advance for the help! Steve Jordan UAB Rad Physics 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 01:30:43 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19B12B-00017t-00; Thu, 01 May 2003 01:30:43 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 3004E1112F1; Thu, 1 May 2003 02:24:38 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id RAA01176 for linac-eng-list; Wed, 30 Apr 2003 17:59:47 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA01172 for ; Wed, 30 Apr 2003 17:59:31 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h3UMxXG0022807 for ; Thu, 1 May 2003 10:59:34 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Thu, 1 May 2003 12:53:17 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Thu, 01 May 2003 10:59:00 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Thu, 01 May 2003 10:58:53 +1200 From: "Dave Pinchin" To: Subject: =?ISO-8859-1?Q?RE:_R=E9f._:_21EX_sn_1836_w/_Varis_6.2.19?= Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 01 May 2003 10:58:53 +1200 From: "Dave Pinchin" To: Subject: =?ISO-8859-1?Q?RE:_R=E9f._:_21EX_sn_1836_w/_Varis_6.2.19?= Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, An interesting issue. (I guess) the PC-uP will have to decide on a packet-by-packet basis which packets it should ignore. We should therefore ensure that extraneous network traffic is kept out of the system. This involves a serious investment in infrastructure. Our system is probably over the top with that regard but I am V happy with it's operation. We have instituted three logical networks for our clinic. 1/ Admin. looked after by the hospital IT dept. 2/ VARiS. (three machines, 1 MLC, 2 PV) 3/ FOCUS planning. All are run off a fancy Cisco switch. Do not spare $$$$ here. You get what you pay for. The advantages are : a/ there is broadcast blocking from everywhere onto VARiS. b/ there is still connectability where (and when) it is required to radiology etc. Disadvantages: a/ It can be challenging mapping inter-subnet disks/printers. especially using NT4SP3. (Net use command in loggin script does wonders). :D >>> "Maddox, Buford J" 1/05/03 09:26:47 >>> We have experienced some timeout errors on a networked MLC when the network is hitting it too often, keeping the PC busy. -----Original Message----- From: normand_freniere_chrtr@ssss.gouv.qc.ca [mailto:normand_freniere_chrtr@ssss.gouv.qc.ca] Sent: Wednesday, April 30, 2003 2:00 PM To: linac-eng@plato.aristotle.net Cc: Stephen Jordan Subject: R��f. : 21EX sn 1836 w/ Varis 6.2.19 Steve, We did also get MLC Comm Timeout Error, but with Varis Treatment 6.2.27 (Portal Vision 6.1 app is also always running in the background). We get the error message for fields which have not portal scheduled. Unfortunately, we could not help you on an explanation and/or solution ... We are unable to reproduce the problem. It happens unpredictably. Varian is aware of the behavior, but because it can not be reproduce ... it is hard for everyone to trouble shoot. We also hope the forum can help! Normand Freni��re, M.Sc., MCCPM Medical physicist Centre Hospitalier R��gional de Trois-Rivi��res Radio-oncologie 1991 boul. du Carmel Trois-Rivi��res Qc G8Z 3R9 Courriel : normand_freniere_chrtr@ssss.gouv.qc.ca "Stephen Jordan" @plato.aristotle.net le 29/04/2003 03:54:46 PM Envoy�� par : owner-linac-eng@plato.aristotle.net Pour : cc : Objet : 21EX sn 1836 w/ Varis 6.2.19 I have an interesting problem I hope the forum can help with: When utilizing PortalVision (vers. 6.1), a MLC Comm Timeout Error is generated. This particular timeout does not occur unless the Portal Vision app is running. Thanks in advance for the help! Steve Jordan UAB Rad Physics ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 05:22:20 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19B4eK-0001Ir-00; Thu, 01 May 2003 05:22:20 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 053D11112F1; Thu, 1 May 2003 06:16:16 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id VAA04342 for linac-eng-list; Wed, 30 Apr 2003 21:54:43 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from web41011.mail.yahoo.com (web41011.mail.yahoo.com [66.218.93.10]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id VAA04338 for ; Wed, 30 Apr 2003 21:54:36 -0500 (CDT) Message-ID: <20030501025405.53942.qmail@web41011.mail.yahoo.com> Received: from [192.169.39.70] by web41011.mail.yahoo.com via HTTP; Wed, 30 Apr 2003 19:54:05 PDT Date: Wed, 30 Apr 2003 19:54:05 -0700 (PDT) From: vichael landicho Subject: precise issues please? To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1326896207-1051757645=:53727" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 30 Apr 2003 19:54:05 -0700 (PDT) From: vichael landicho Subject: precise issues please? To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --0-1326896207-1051757645=:53727 Content-Type: text/plain; charset=us-ascii Dear Engineers, We have two units of precise (only) in the hospital. I am pleased reading tricks, tips and problem solution from this site, it's educating. Can any one raise some tips or problems that arise from their Elekta may it be SL Series or Precise? BongPhilippines --------------------------------- Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. --0-1326896207-1051757645=:53727 Content-Type: text/html; charset=us-ascii

Dear Engineers,

We have two units of precise (only) in the hospital. I am pleased reading tricks, tips and problem solution from this site, it's educating.

Can any one raise some tips or problems that arise from their Elekta may it be SL Series or Precise?

Bong

Philippines

Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo. --0-1326896207-1051757645=:53727-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 07:25:24 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19B6ZQ-0001b8-00; Thu, 01 May 2003 07:25:24 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E2B941112F1; Thu, 1 May 2003 08:19:17 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id AAA06314 for linac-eng-list; Thu, 1 May 2003 00:02:07 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from [203.5.110.194] ([203.5.110.252]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id AAA06310 for ; Thu, 1 May 2003 00:02:04 -0500 (CDT) Received: from bablia.ccf.health.nsw.gov.au by [203.5.110.194] via smtpd (for plato.aristotle.net [206.66.224.2]) with SMTP; Thu, 1 May 2003 15:02:04 +1000 Received: from mxscan ([203.5.108.56]) by health.nsw.gov.au (PMDF V6.0-24 #44005) with SMTP id <01KVDQQRTVQ0002Z6M@health.nsw.gov.au> for linac-eng@plato.aristotle.net; Thu, 01 May 2003 15:01:32 -0500 (EST) Received: from 203.5.108.57 by mxscan (InterScan E-Mail VirusWall NT); Thu, 01 May 2003 14:49:07 +1000 Received: from DOH_HUB-Message_Server by doh.health.nsw.gov.au with Novell_GroupWise; Thu, 01 May 2003 14:52:17 +1000 Date: Thu, 01 May 2003 13:33:15 +1000 From: Vince Reynolds Subject: MLC study-wear and tear/maintainance To: linac-eng@plato.aristotle.net Message-id: MIME-version: 1.0 X-Mailer: Novell GroupWise 5.5.2 Content-type: multipart/mixed; boundary="----=_NextPartTM-000-9ea385f4-1004-4087-83fd-354904b69e95" Content-disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 01 May 2003 13:33:15 +1000 From: Vince Reynolds Subject: MLC study-wear and tear/maintainance To: linac-eng@plato.aristotle.net Content-disposition: inline Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPartTM-000-9ea385f4-1004-4087-83fd-354904b69e95 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable I deleted the posting from ? about the MLC study. My apologies for forgetting your name and center but would you get in = touch with me please-it has sparked up some interest here. regards Vince Reynolds Royal North Shore Hospital=20 Sydney ------=_NextPartTM-000-9ea385f4-1004-4087-83fd-354904b69e95 Content-Type: text/plain; name="InterScan_Disclaimer.txt" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="InterScan_Disclaimer.txt" This message is intended for the addressee named and may contain confidential information. If you are not the intended recipient, please delete it and notify the sender. Views expressed in this message are those of the individual sender, and are not necessarily the views of NSW Health. ------=_NextPartTM-000-9ea385f4-1004-4087-83fd-354904b69e95-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 12:16:10 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BB6o-0003bE-00; Thu, 01 May 2003 12:16:10 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E23901112F1; Thu, 1 May 2003 13:10:04 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id EAA10101 for linac-eng-list; Thu, 1 May 2003 04:48:31 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from intfw1.phci.org (user.phci.org [207.67.109.70]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id EAA10097 for ; Thu, 1 May 2003 04:48:29 -0500 (CDT) Received: from intfw1.phci.org (root@localhost) by intfw1.phci.org with ESMTP id h419ls9Y023152 for ; Thu, 1 May 2003 04:47:54 -0500 (CDT) Received: from zixvpm00.phci.org (zixvpm02.phci.org [172.20.3.22]) by intfw1.phci.org with ESMTP id h419lrRt023149 for ; Thu, 1 May 2003 04:47:53 -0500 (CDT) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by Outbound.phci.org (Proprietary) with ESMTP id C402B1C0067 for ; Thu, 1 May 2003 04:47:53 -0500 (CDT) Received: from rwdmail.phci.org (smtpscan.phci.org [172.20.3.10]) by zixvpm00.phci.org (Proprietary) with SMTP id 9A2601A4070; Thu, 1 May 2003 04:47:53 -0500 (CDT) Received: through eSafe SMTP Relay 1051114651; Thu May 01 04:47:53 2003 Received: by rwdmail.phci.org with Internet Mail Service (5.5.2653.19) id <20WAGF4K>; Thu, 1 May 2003 04:52:07 -0500 Message-ID: <7A3389A8D723D511B2260008C7B2BF390D60EA@wmhmail.phci.org> From: "Williams, Rod" To: "'David Burgess'" , linac-eng@plato.aristotle.net Subject: RE: Elaborate water study Date: Thu, 1 May 2003 04:47:43 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C30FC6.B6A0D240" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Williams, Rod" To: "'David Burgess'" , linac-eng@plato.aristotle.net Subject: RE: Elaborate water study Date: Thu, 1 May 2003 04:47:43 -0500 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C30FC6.B6A0D240 Content-Type: text/plain; charset="iso-8859-1" I am surprised you are using RO water. The stuff is supposed to be very aggressive. When they install these systems in your home they use plastic tubing because it eats up the plumbing. This is what I am told. Sounds like a interesting study. -----Original Message----- From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] Sent: Wednesday, April 30, 2003 10:59 AM To: linac-eng@plato.aristotle.net Subject: Elaborate water study I'm part of a small group starting a detailed water analysis study on Varian Clinacs. The study purpose is to ensure copper and other machine losses are now minimized. The study might include a water chemical analysis, hose deteriation/longevity, sacrificial electrodes, biological slime content, machine run time vs losses per hour, galvanic conduction and repair cost vs losses. Is there anything else from your experiences that you feel we should include ? I hope other clinics might be interested in contributing any info or analysis data they have. In Eastern Canada a new machine will soon start up with the water additive. Other machines here are using RO water and flushing at different intervals. There is a mix of LEs and HEs. We also have a 8 year old 2100C with new guide sled and new Bending magnet. The study duration will be 3 years, with interim reports available to interested parties. The final report will probably be presented as a paper to some physics/service gathering. David Burgess Nova Scotia Cancer Centre Halifax, Canada This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. ------_=_NextPart_001_01C30FC6.B6A0D240 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I am surprised you a= re using RO=20 water. The stuff is supposed to be very aggressive. When they instal= l these=20 systems in your home they use plastic tubing because it eats up the plumb= ing.=20 This is what I am told. Sounds like a interesting study.

-----Original=20 Message-----
From: David Burgess=20 [mailto:David.Burgess@cdha.nshealth.ca]
Sent: Wednesday, Apri= l 30,=20 2003 10:59 AM
To: linac-eng@plato.aristotle.net
Subject= :=20 Elaborate water study

I'm part of a small group = starting a=20 detailed water analysis study on Varian Clinacs.

The study purpose is to en= sure copper=20 and other machine losses are now minimized.

The study might include a = water=20 chemical analysis, hose deteriation/longevity, sacrificial electrodes,=20 biological slime content, machine run time vs losses per hour, galvanic= =20 conduction and repair cost vs losses.

Is there anything else fro= m your=20 experiences that you feel we should include ?
I hope other clinics might= be=20 interested in contributing any info or analysis data they=20 have.

In Eastern Canada a n= ew machine=20 will soon start up with the water additive. Other machines here are usi= ng RO=20 water and flushing at different intervals. There is a mix of LEs and=20 HEs.

We also have a 8 year old = 2100C with=20 new guide sled and new Bending magnet.

The study duration will be= 3 years,=20 with interim reports available to interested parties. The final report = will=20 probably be presented as a paper to some physics/service=20 gathering.

David Burgess

Nova Scotia Cancer=20 Centre

Halifax, Canada

This email message may contain confidential information and is=20 intended only for the individual named. If you are not the named=20 addressee you should not disseminate, distribute or copy this ema= il.=20 Please notify the sender immediately by email if you have receive= d this=20 email by mistake and delete this email from your system. Email=20 transmissions cannot be guaranteed to be secure or error free as=20 information could be intercepted, corrupted, lost, destroyed, arr= ive=20 late or incomplete, or contain viruses. The sender therefore does= not=20 accept any liability for errors or omissions in the contents of t= his=20 message that arise as a result of email transmissions. If verific= ation=20 is required please request a hard copy version.

This information is confidential and int= ended solely for the use of the individual or entity to whom it is addres= sed.

If you have received this email in error= please notify the sender or our Help Desk at (262) 928-2777.

We have scanned this email and its attac= hments for malicious content.

However, the recipient should check this= email and any attachments for the presence of viruses.

ProHealth Care, Inc. accepts no liabilit= y for any damage caused by any virus transmitted by this email.
------_=_NextPart_001_01C30FC6.B6A0D240-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 13:55:58 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BCfO-00055u-00; Thu, 01 May 2003 13:55:58 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 112261112F1; Thu, 1 May 2003 14:49:51 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id GAA11383 for linac-eng-list; Thu, 1 May 2003 06:29:01 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from sccrmhc01.attbi.com (sccrmhc01.attbi.com [204.127.202.61]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id GAA11379 for ; Thu, 1 May 2003 06:28:59 -0500 (CDT) Received: from attbi.com (12-247-220-103.client.attbi.com[12.247.220.103]) by sccrmhc01.attbi.com (sccrmhc01) with SMTP id <2003050111282100100nke2le>; Thu, 1 May 2003 11:28:22 +0000 Date: Thu, 1 May 2003 06:27:40 -0500 Subject: R.O. vs. distilled water Content-Type: multipart/alternative; boundary=Apple-Mail-2-466816865 Mime-Version: 1.0 (Apple Message framework v552) Cc: Rich Kimball , "'David Burgess'" , linac-eng@plato.aristotle.net To: "Williams, Rod" From: Rich Kimball In-Reply-To: <7A3389A8D723D511B2260008C7B2BF390D60EA@wmhmail.phci.org> Message-Id: X-Mailer: Apple Mail (2.552) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 1 May 2003 06:27:40 -0500 Subject: R.O. vs. distilled water Cc: Rich Kimball , "'David Burgess'" , linac-eng@plato.aristotle.net To: "Williams, Rod" From: Rich Kimball In-Reply-To: <7A3389A8D723D511B2260008C7B2BF390D60EA@wmhmail.phci.org> Sender: owner-linac-eng@plato.aristotle.net --Apple-Mail-2-466816865 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=ISO-8859-1; format=flowed Dave, I would have to strongly advise against the use of reverse osmosis=20 water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to=20 > be=A0very aggressive. When they install these systems in your home = they=20 > use plastic tubing because it eats up the plumbing. This is what I am=20= > told. Sounds like a interesting study. > =A0 > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on=20= > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now=20= > minimized. > The study might include a water chemical analysis, hose=20 > deteriation/longevity, sacrificial electrodes, biological slime=20 > content, machine run time vs losses per hour, galvanic conduction and=20= > repair cost vs losses. > Is there anything else from your experiences that=A0you feel=A0we = =A0should=20 > include ? > I hope other clinics might be interested in=A0contributing any info or=20= > analysis data they have. > In=A0Eastern Canada a new machine will soon start up with the water=20 > additive. Other machines here are using RO water and flushing at=20 > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending=20 > magnet. > The study duration will be 3 years, with interim reports available to=20= > interested parties. The final report will probably be presented as a=20= > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > =A0 > > > --Apple-Mail-2-466816865 Content-Transfer-Encoding: quoted-printable Content-Type: text/enriched; charset=ISO-8859-1 Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: I am surprised you are using RO water. The stuff is supposed to be=A0very aggressive. When they install these systems in your home they use plastic tubing because it eats up the plumbing. This is what I am told. Sounds like a interesting study. =A0 -----Original Message----- From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] Sent: Wednesday, April 30, 2003 10:59 AM To: linac-eng@plato.aristotle.net Subject: Elaborate water study Times New RomanI'm part of a small group starting a detailed water analysis study on Varian = Clinacs. Times New RomanThe study purpose is to ensure copper and other machine losses are now = minimized. Times New RomanThe study might include a water chemical analysis, hose deteriation/longevity, sacrificial electrodes, biological slime content, machine run time vs losses per hour, galvanic conduction and repair cost vs = losses. Times New RomanIs there anything else from your experiences that=A0you feel=A0we =A0should include = ? Times New RomanI hope other clinics might be interested in=A0contributing any info or analysis data they have. Times New RomanIn=A0Eastern Canada a new machine will soon start up with the water additive. Other machines here are using RO water and flushing at different intervals. There is a mix of LEs and HEs. Times New RomanWe also have a 8 year old 2100C with new guide sled and new Bending = magnet. Times New RomanThe study duration will be 3 years, with interim reports available to interested parties. The final report will probably be presented as a paper to some physics/service gathering. Times New RomanDavid = Burgess Times New RomanNova Scotia Cancer Centre Times New RomanHalifax, = Canada =A0 < --Apple-Mail-2-466816865-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 14:58:01 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BDdR-0005rX-00; Thu, 01 May 2003 14:58:01 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 868DD1112F1 for ; Thu, 1 May 2003 15:51:55 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVDQCO1MDS8X4FBJ@med.uu.nl> for kok@radth.med.uu.nl; Thu, 1 May 2003 14:50:12 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVDQCL2O5E8XF5AB@med.uu.nl> for kok@radth.med.uu.nl; Thu, 01 May 2003 14:50:07 +0200 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id GAA11383 for linac-eng-list; Thu, 01 May 2003 06:29:01 -0500 (CDT) Received: from sccrmhc01.attbi.com (sccrmhc01.attbi.com [204.127.202.61]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id GAA11379 for ; Thu, 01 May 2003 06:28:59 -0500 (CDT) Received: from attbi.com (12-247-220-103.client.attbi.com[12.247.220.103]) by sccrmhc01.attbi.com (sccrmhc01) with SMTP id <2003050111282100100nke2le>; Thu, 01 May 2003 11:28:22 +0000 Date: Thu, 01 May 2003 06:27:40 -0500 From: Rich Kimball Subject: R.O. vs. distilled water In-reply-to: <7A3389A8D723D511B2260008C7B2BF390D60EA@wmhmail.phci.org> Sender: owner-linac-eng@plato.aristotle.net To: "Williams, Rod" Cc: Rich Kimball , 'David Burgess' , linac-eng@plato.aristotle.net Message-id: MIME-version: 1.0 (Apple Message framework v552) X-Mailer: Apple Mail (2.552) Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_q5Ek0VAPgfMOjr0FPbXvsw)" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 01 May 2003 06:27:40 -0500 From: Rich Kimball Subject: R.O. vs. distilled water In-reply-to: <7A3389A8D723D511B2260008C7B2BF390D60EA@wmhmail.phci.org> Sender: owner-linac-eng@plato.aristotle.net To: "Williams, Rod" Cc: Rich Kimball , 'David Burgess' , linac-eng@plato.aristotle.net X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f --Boundary_(ID_q5Ek0VAPgfMOjr0FPbXvsw) Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: quoted-printable Dave, I would have to strongly advise against the use of reverse osmosis=20 water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to=20 > be=A0very aggressive. When they install these systems in your home = they=20 > use plastic tubing because it eats up the plumbing. This is what I am=20= > told. Sounds like a interesting study. > =A0 > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on=20= > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now=20= > minimized. > The study might include a water chemical analysis, hose=20 > deteriation/longevity, sacrificial electrodes, biological slime=20 > content, machine run time vs losses per hour, galvanic conduction and=20= > repair cost vs losses. > Is there anything else from your experiences that=A0you feel=A0we = =A0should=20 > include ? > I hope other clinics might be interested in=A0contributing any info or=20= > analysis data they have. > In=A0Eastern Canada a new machine will soon start up with the water=20 > additive. Other machines here are using RO water and flushing at=20 > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending=20 > magnet. > The study duration will be 3 years, with interim reports available to=20= > interested parties. The final report will probably be presented as a=20= > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > =A0 > > > --Boundary_(ID_q5Ek0VAPgfMOjr0FPbXvsw) Content-type: text/enriched; charset=ISO-8859-1 Content-transfer-encoding: quoted-printable Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: I am surprised you are using RO water. The stuff is supposed to be=A0very aggressive. When they install these systems in your home they use plastic tubing because it eats up the plumbing. This is what I am told. Sounds like a interesting study. =A0 -----Original Message----- From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] Sent: Wednesday, April 30, 2003 10:59 AM To: linac-eng@plato.aristotle.net Subject: Elaborate water study Times New RomanI'm part of a small group starting a detailed water analysis study on Varian = Clinacs. Times New RomanThe study purpose is to ensure copper and other machine losses are now = minimized. Times New RomanThe study might include a water chemical analysis, hose deteriation/longevity, sacrificial electrodes, biological slime content, machine run time vs losses per hour, galvanic conduction and repair cost vs = losses. Times New RomanIs there anything else from your experiences that=A0you feel=A0we =A0should include = ? Times New RomanI hope other clinics might be interested in=A0contributing any info or analysis data they have. Times New RomanIn=A0Eastern Canada a new machine will soon start up with the water additive. Other machines here are using RO water and flushing at different intervals. There is a mix of LEs and HEs. Times New RomanWe also have a 8 year old 2100C with new guide sled and new Bending = magnet. Times New RomanThe study duration will be 3 years, with interim reports available to interested parties. The final report will probably be presented as a paper to some physics/service gathering. Times New RomanDavid = Burgess Times New RomanNova Scotia Cancer Centre Times New RomanHalifax, = Canada =A0 < --Boundary_(ID_q5Ek0VAPgfMOjr0FPbXvsw)-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 17:37:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BG81-0007fW-00; Thu, 01 May 2003 17:37:45 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id B6C711112F1 for ; Thu, 1 May 2003 18:31:39 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVDVWXH3Y88X3VJE@med.uu.nl> for kok@radth.med.uu.nl; Thu, 1 May 2003 17:30:03 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVDVWVL3668XU1KR@med.uu.nl> for kok@radth.med.uu.nl; Thu, 01 May 2003 17:30:01 +0200 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA13143 for linac-eng-list; Thu, 01 May 2003 07:45:22 -0500 (CDT) Received: from mail1.nhs.uk (mail1.nhs.uk [213.120.235.81]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA13139 for ; Thu, 01 May 2003 07:45:20 -0500 (CDT) Received: from hn-ext by mail1.nhs.uk (Sendmail 8.8.8) with esmtp id 19BDQf-0002Ef-00; Thu, 01 May 2003 13:44:49 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B600A9F8F5 for linac-eng@plato.aristotle.net; Thu, 01 May 2003 13:44:49 +0100 Received: from mta.grampian.scot.nhs.uk (195.106.102.11) by relay.nhs.uk (Syntegra-1 7.0.008) id 3EAFD6580007B652; Thu, 01 May 2003 13:44:49 +0100 Received: from arh_mail.grampian.scot.nhs.uk (actually host arh.grampian.scot.nhs.uk) by mta.grampian.scot.nhs.uk with SMTP (Mailer) with ESMTP; Thu, 01 May 2003 13:40:32 +0100 Received: by arh.grampian.scot.nhs.uk with Internet Mail Service (5.5.2650.21) id ; Thu, 01 May 2003 13:43:52 +0100 Date: Thu, 01 May 2003 13:43:48 +0100 From: David.Smith@arh.grampian.scot.nhs.uk Subject: RE: Elaborate water study Sender: owner-linac-eng@plato.aristotle.net To: rod.williams@phci.org Cc: linac-eng@plato.aristotle.net Message-id: <5FB97D7B340FD2118A6100A0C9A9A1F505D07D74@arh.grampian.scot.nhs.uk> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-type: text/plain Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 01 May 2003 13:43:48 +0100 From: David.Smith@arh.grampian.scot.nhs.uk Subject: RE: Elaborate water study Sender: owner-linac-eng@plato.aristotle.net To: rod.williams@phci.org Cc: linac-eng@plato.aristotle.net X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f We used RO water with no additives on an Elekta SL75 and an ABB CH20 for 23 combined machine years with no problems. The secret was to only ever top up to account for evaporation therefore limiting the waters ability to leach copper. We never did routine complete water changes. > -----Original Message----- > From: Williams, Rod [SMTP:rod.williams@phci.org] > Sent: Thursday, May 01, 2003 10:48 AM > To: 'David Burgess'; linac-eng@plato.aristotle.net > Subject: RE: Elaborate water study > > I am surprised you are using RO water. The stuff is supposed to be very > aggressive. When they install these systems in your home they use plastic > tubing because it eats up the plumbing. This is what I am told. Sounds > like a interesting study. > > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > > I'm part of a small group starting a detailed water analysis study > on Varian Clinacs. > The study purpose is to ensure copper and other machine losses are > now minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime content, > machine run time vs losses per hour, galvanic conduction and repair cost > vs losses. > Is there anything else from your experiences that you feel we > should include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at different > intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available > to interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > This email message may contain confidential information and is intended > only for the individual named. If you are not the named addressee you > should not disseminate, distribute or copy this email. Please notify the > sender immediately by email if you have received this email by mistake and > delete this email from your system. 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If verification is required please request a hard copy > version. > > > > This information is confidential and intended solely for the use of the > individual or entity to whom it is addressed. > > If you have received this email in error please notify the sender or our > Help Desk at (262) 928-2777. > > > We have scanned this email and its attachments for malicious content. > > However, the recipient should check this email and any attachments for the > presence of viruses. > > ProHealth Care, Inc. accepts no liability for any damage caused by any > virus transmitted by this email. > > 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 18:25:08 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BGrs-0007rb-00; Thu, 01 May 2003 18:25:08 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 86C281112F2 for ; Thu, 1 May 2003 19:19:03 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVDXKO79CG8XKAHA@med.uu.nl> for kok@radth.med.uu.nl; Thu, 1 May 2003 18:17:26 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVDXKL8DXI8XHA3S@med.uu.nl> for kok@radth.med.uu.nl; Thu, 01 May 2003 18:17:23 +0200 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id JAA15108 for linac-eng-list; Thu, 01 May 2003 09:06:06 -0500 (CDT) Received: from mail.cbdha.nshealth.ca (mail.cbdha.nshealth.ca [142.176.129.245]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA15102 for ; Thu, 01 May 2003 09:05:58 -0500 (CDT) Received: from ([128.222.7.122]) by mail.cbdha.nshealth.ca (Merak 4.2.3) with SMTP id LPA73855 for ; Thu, 01 May 2003 11:08:30 -0300 Date: Thu, 01 May 2003 11:04:38 -0300 From: Greg MacKinnon Subject: =?iso-8859-1?Q?RE:_R=E9f._:_21EX_sn_1836_w/_Varis_6.2.19?= In-reply-to: Sender: owner-linac-eng@plato.aristotle.net To: LinacEng Message-id: MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 8BIT Importance: Normal X-Priority: 3 (Normal) X-MSMail-priority: Normal Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 01 May 2003 11:04:38 -0300 From: Greg MacKinnon Subject: =?iso-8859-1?Q?RE:_R=E9f._:_21EX_sn_1836_w/_Varis_6.2.19?= In-reply-to: Sender: owner-linac-eng@plato.aristotle.net To: LinacEng X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal X-Priority: 3 (Normal) X-MSMail-priority: Normal X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Hi Group I am curious to know how other clinics configure their treatment networks with respect the rest of the hospitals. Other hospital network is under going a reconfiguration and they are looking at tie my treatment network into thiers. But from what I have found in the Varian document 'Network Configuration Guidelines - P/N:100014120', the two networks should remain isolated. Any comments from the group on this. Thanks __________________________________________ Greg MacKinnon, C.E.T. Linear Accelerator Service Technologist Cape Breton Cancer Centre 1482 George Street Sydney, Nova Scotia, Canada B1P 1P3 tel: (902) 567-8076 fax: (902) 567-8075 email: mackinnongreg@cbdha.nshealth.ca -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Dave Pinchin Sent: Wednesday, April 30, 2003 7:59 PM To: linac-eng@plato.aristotle.net Subject: RE: R��f. : 21EX sn 1836 w/ Varis 6.2.19 G'day, An interesting issue. (I guess) the PC-uP will have to decide on a packet-by-packet basis which packets it should ignore. We should therefore ensure that extraneous network traffic is kept out of the system. This involves a serious investment in infrastructure. Our system is probably over the top with that regard but I am V happy with it's operation. We have instituted three logical networks for our clinic. 1/ Admin. looked after by the hospital IT dept. 2/ VARiS. (three machines, 1 MLC, 2 PV) 3/ FOCUS planning. All are run off a fancy Cisco switch. Do not spare $$$$ here. You get what you pay for. The advantages are : a/ there is broadcast blocking from everywhere onto VARiS. b/ there is still connectability where (and when) it is required to radiology etc. Disadvantages: a/ It can be challenging mapping inter-subnet disks/printers. especially using NT4SP3. (Net use command in loggin script does wonders). :D >>> "Maddox, Buford J" 1/05/03 09:26:47 >>> We have experienced some timeout errors on a networked MLC when the network is hitting it too often, keeping the PC busy. -----Original Message----- From: normand_freniere_chrtr@ssss.gouv.qc.ca [mailto:normand_freniere_chrtr@ssss.gouv.qc.ca] Sent: Wednesday, April 30, 2003 2:00 PM To: linac-eng@plato.aristotle.net Cc: Stephen Jordan Subject: R��f. : 21EX sn 1836 w/ Varis 6.2.19 Steve, We did also get MLC Comm Timeout Error, but with Varis Treatment 6.2.27 (Portal Vision 6.1 app is also always running in the background). We get the error message for fields which have not portal scheduled. Unfortunately, we could not help you on an explanation and/or solution ... We are unable to reproduce the problem. It happens unpredictably. Varian is aware of the behavior, but because it can not be reproduce ... it is hard for everyone to trouble shoot. We also hope the forum can help! Normand Freni��re, M.Sc., MCCPM Medical physicist Centre Hospitalier R��gional de Trois-Rivi��res Radio-oncologie 1991 boul. du Carmel Trois-Rivi��res Qc G8Z 3R9 Courriel : normand_freniere_chrtr@ssss.gouv.qc.ca "Stephen Jordan" @plato.aristotle.net le 29/04/2003 03:54:46 PM Envoy�� par : owner-linac-eng@plato.aristotle.net Pour : cc : Objet : 21EX sn 1836 w/ Varis 6.2.19 I have an interesting problem I hope the forum can help with: When utilizing PortalVision (vers. 6.1), a MLC Comm Timeout Error is generated. This particular timeout does not occur unless the Portal Vision app is running. Thanks in advance for the help! Steve Jordan UAB Rad Physics ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). 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Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 18:35:54 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BH2I-0007wi-00; Thu, 01 May 2003 18:35:54 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0194B1112F2; Thu, 1 May 2003 19:29:47 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id LAA18081 for linac-eng-list; Thu, 1 May 2003 11:06:43 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail2.vcu.edu (mail2.vcu.edu [128.172.1.135]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id LAA18077 for ; Thu, 1 May 2003 11:06:38 -0500 (CDT) Received: from hsc.vcu.edu ([208.31.209.254]) by mail2.vcu.edu (8.12.0/8.11.3) with ESMTP id h41G5vIW192742; Thu, 1 May 2003 12:06:00 -0400 Message-ID: <3EB1461B.60802@hsc.vcu.edu> Date: Thu, 01 May 2003 12:06:51 -0400 From: "Christopher L. Bartee" User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.2.1) Gecko/20021130 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Dave Pinchin Cc: kimyeung@netvigator.com, linac-eng@plato.aristotle.net Subject: Re: Varian EDW termination at wrong position References: In-Reply-To: Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 01 May 2003 12:06:51 -0400 From: "Christopher L. Bartee" X-Accept-Language: en-us, en To: Dave Pinchin Cc: kimyeung@netvigator.com, linac-eng@plato.aristotle.net Subject: Re: Varian EDW termination at wrong position In-Reply-To: Sender: owner-linac-eng@plato.aristotle.net I would also verify all machine config and software config is the same ie: Machine Scale

Chris,

Dave Pinchin wrote:

G'day,
I would suggest that you do a tank measurement using the same treatment
paramenters to quantify the suspected errors.

:D

"kim yeung" <kimyeung@netvigator.com> 1/05/03 05:09:35 >>>

Hi Colleagues,
    
    Varian Clinac, 2300CD & 600CD Version 6.1

We had several reports of wrong position termination of EDW on our
2300CD and 600CD. In these incidents, the moving jaw stopped about 1cm
before its designated position (i.e. at 1.4cm instead of 0.5cm) and the
MU was okay, the Clinac did not show any interlocks.  The EDW log showed
the treatment was complete in normal way, the moving jaw stopped at
0.48cm, i.e. within MU and position tolerances.

Does anyone have such experience before?

Could anyone advise the following:-
1. The sampling mechanism of the dynamic log;
2. The tripping nature of DPSN; and
3. EDW termination mechanism.

Thanks in advance.

Kim Yeung


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1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 19:46:37 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BI8i-00085A-00; Thu, 01 May 2003 19:46:36 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 6B3DE1112F2 for ; Thu, 1 May 2003 20:40:25 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVE0FL28CG8XIJ3X@med.uu.nl> for kok@radth.med.uu.nl; Thu, 1 May 2003 19:38:51 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVE0FI6E708XFJ8F@med.uu.nl> for kok@radth.med.uu.nl; Thu, 01 May 2003 19:38:48 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id LAA18081 for linac-eng-list; Thu, 01 May 2003 11:06:43 -0500 (CDT) Received: from mail2.vcu.edu (mail2.vcu.edu [128.172.1.135]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id LAA18077 for ; Thu, 01 May 2003 11:06:38 -0500 (CDT) Received: from hsc.vcu.edu ([208.31.209.254]) by mail2.vcu.edu (8.12.0/8.11.3) with ESMTP id h41G5vIW192742; Thu, 01 May 2003 12:06:00 -0400 Date: Thu, 01 May 2003 12:06:51 -0400 From: "Christopher L. Bartee" Subject: Re: Varian EDW termination at wrong position In-reply-to: Sender: owner-linac-eng@plato.aristotle.net To: Dave Pinchin Cc: kimyeung@netvigator.com, linac-eng@plato.aristotle.net Message-id: <3EB1461B.60802@hsc.vcu.edu> MIME-version: 1.0 Content-type: text/html; charset=us-ascii Content-transfer-encoding: 7bit Precedence: bulk User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.2.1) Gecko/20021130 X-Accept-Language: en-us, en References: X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 01 May 2003 12:06:51 -0400 From: "Christopher L. Bartee" Subject: Re: Varian EDW termination at wrong position In-reply-to: Sender: owner-linac-eng@plato.aristotle.net To: Dave Pinchin Cc: kimyeung@netvigator.com, linac-eng@plato.aristotle.net X-Accept-Language: en-us, en X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f I would also verify all machine config and software config is the same ie: Machine Scale

Chris,

Dave Pinchin wrote:

G'day,
I would suggest that you do a tank measurement using the same treatment
paramenters to quantify the suspected errors.

:D

"kim yeung" <kimyeung@netvigator.com> 1/05/03 05:09:35 >>>

Hi Colleagues,
    
    Varian Clinac, 2300CD & 600CD Version 6.1

We had several reports of wrong position termination of EDW on our
2300CD and 600CD. In these incidents, the moving jaw stopped about 1cm
before its designated position (i.e. at 1.4cm instead of 0.5cm) and the
MU was okay, the Clinac did not show any interlocks.  The EDW log showed
the treatment was complete in normal way, the moving jaw stopped at
0.48cm, i.e. within MU and position tolerances.

Does anyone have such experience before?

Could anyone advise the following:-
1. The sampling mechanism of the dynamic log;
2. The tripping nature of DPSN; and
3. EDW termination mechanism.

Thanks in advance.

Kim Yeung


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1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 22:46:40 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BKwy-0008K9-00; Thu, 01 May 2003 22:46:40 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id EC1951112F2; Thu, 1 May 2003 23:40:31 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id PAA23628 for linac-eng-list; Thu, 1 May 2003 15:18:13 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA23622 for ; Thu, 1 May 2003 15:18:09 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h41KI9G0003393 for ; Fri, 2 May 2003 08:18:09 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Fri, 2 May 2003 10:11:48 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Fri, 02 May 2003 08:17:35 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Fri, 02 May 2003 08:17:21 +1200 From: "Dave Pinchin" To: , Subject: Re: R.O. vs. distilled water Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 02 May 2003 08:17:21 +1200 From: "Dave Pinchin" To: , Subject: Re: R.O. vs. distilled water Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, I may be wrong here but it is my understanding that the reason RO water is so aggressive is that it is so pure. It tears ions out of stuff to dilute itself. Therefore, distilled water is going to be no less aggressive. It could even be MORE aggressive if it were distilled properly. We use V's recommendations here. Good, clean, pure triple RO water and then throw some nasty gunk into it to impurify it again............ It makes sense. Dave. >>> Rich Kimball 1/05/03 23:27:40 >>> Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to > be very aggressive. When they install these systems in your home they > use plastic tubing because it eats up the plumbing. This is what I am > told. Sounds like a interesting study. > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now > minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime > content, machine run time vs losses per hour, galvanic conduction and > repair cost vs losses. > Is there anything else from your experiences that you feel we should > include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available to > interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > > > ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 23:03:35 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BLDL-0008Li-00; Thu, 01 May 2003 23:03:35 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 6FAFB1112F5; Thu, 1 May 2003 23:57:26 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id PAA23901 for linac-eng-list; Thu, 1 May 2003 15:35:50 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA23897 for ; Thu, 1 May 2003 15:35:46 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h41KZnG0005256 for ; Fri, 2 May 2003 08:35:49 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Fri, 2 May 2003 10:29:28 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Fri, 02 May 2003 08:35:15 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Fri, 02 May 2003 08:35:07 +1200 From: "Dave Pinchin" To: , Subject: RE: Elaborate water study Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 02 May 2003 08:35:07 +1200 From: "Dave Pinchin" To: , Subject: RE: Elaborate water study Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, Here's an interesting point. The water rushes round dragging in stray ions of copper. It is no longer pure. It no longer drags in stray ions of copper. The problem arises when regular water changes are REQUIRED. Our site had trouble with BMAG interlock. We were able to keep the machine under control by replacing the water every 6 months. We have had 2 BMAG leaks and a kly sol leak. PS. the BMAG problem has been resolved and we now run the goop protocol. :D >>> 2/05/03 00:43:48 >>> We used RO water with no additives on an Elekta SL75 and an ABB CH20 for 23 combined machine years with no problems. The secret was to only ever top up to account for evaporation therefore limiting the waters ability to leach copper. We never did routine complete water changes. > -----Original Message----- > From: Williams, Rod [SMTP:rod.williams@phci.org] > Sent: Thursday, May 01, 2003 10:48 AM > To: 'David Burgess'; linac-eng@plato.aristotle.net > Subject: RE: Elaborate water study > > I am surprised you are using RO water. The stuff is supposed to be very > aggressive. When they install these systems in your home they use plastic > tubing because it eats up the plumbing. This is what I am told. Sounds > like a interesting study. > > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > > I'm part of a small group starting a detailed water analysis study > on Varian Clinacs. > The study purpose is to ensure copper and other machine losses are > now minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime content, > machine run time vs losses per hour, galvanic conduction and repair cost > vs losses. > Is there anything else from your experiences that you feel we > should include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at different > intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available > to interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > This email message may contain confidential information and is intended > only for the individual named. If you are not the named addressee you > should not disseminate, distribute or copy this email. Please notify the > sender immediately by email if you have received this email by mistake and > delete this email from your system. 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Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 01 23:41:10 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BLni-0008PJ-00; Thu, 01 May 2003 23:41:10 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 4D6031112F3; Fri, 2 May 2003 00:35:02 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id QAA26210 for linac-eng-list; Thu, 1 May 2003 16:05:16 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA26201 for ; Thu, 1 May 2003 16:05:04 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h41L56G0008434 for ; Fri, 2 May 2003 09:05:06 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Fri, 2 May 2003 10:58:45 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Fri, 02 May 2003 09:04:31 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Fri, 02 May 2003 09:04:10 +1200 From: "Dave Pinchin" To: , Subject: =?ISO-8859-1?Q?RE:_R=E9f._:_21EX_sn_1836_w/_Varis_6.2.19?= Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 02 May 2003 09:04:10 +1200 From: "Dave Pinchin" To: , Subject: =?ISO-8859-1?Q?RE:_R=E9f._:_21EX_sn_1836_w/_Varis_6.2.19?= Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day Greg, There are issues that should be carefully considered. Ethernet is an assyncronous transport media by design. The interfaces are assync by design. This is so that any request can be sent anywhere and be serviced by the target machine which willl reply in due course and everybody will be happy as long as they don't have to wait tooooo long. The road analogy is very good. The more traffic on the system the more the delays. Record and verify. Here's the crux of the matter. This is a real time issue. It is a Synchronous task. (My view is it should not be on ethernet). There are ways to make it work. There MUST be a real good ($$$$$$) switch/firewall blocking hospital traffic from your RV system. Here's a piece of a recent posting.......(sorry to repeat) "We should therefore ensure that extraneous network traffic is kept out of the system. This involves a serious investment in infrastructure. Our system is probably over the top with that regard but I am V happy with it's operation. We have instituted three logical networks for our clinic. 1/ Admin. looked after by the hospital IT dept. 2/ VARiS. (three machines, 1 MLC, 2 PV) 3/ FOCUS planning. All are run off a fancy Cisco switch. Do not spare $$$$ here. You get what you pay for. The advantages are : a/ there is broadcast blocking from everywhere onto VARiS. b/ there is still connectability where (and when) it is required to radiology etc. Disadvantages: a/ It can be challenging mapping inter-subnet disks/printers. especially using NT4SP3. (Net use command in loggin script does wonders). " I hope this gives you enough info to get what you need from your IS dept. They don't understand the real time word at all. Don't let them stuff you around. They can litterally half the throughput of your $2,000,000.00 machines. >>> "Greg MacKinnon" 2/05/03 02:04:38 >>> Hi Group I am curious to know how other clinics configure their treatment networks with respect the rest of the hospitals. Other hospital network is under going a reconfiguration and they are looking at tie my treatment network into thiers. But from what I have found in the Varian document 'Network Configuration Guidelines - P/N:100014120', the two networks should remain isolated. Any comments from the group on this. Thanks __________________________________________ Greg MacKinnon, C.E.T. Linear Accelerator Service Technologist Cape Breton Cancer Centre 1482 George Street Sydney, Nova Scotia, Canada B1P 1P3 tel: (902) 567-8076 fax: (902) 567-8075 email: mackinnongreg@cbdha.nshealth.ca -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Dave Pinchin Sent: Wednesday, April 30, 2003 7:59 PM To: linac-eng@plato.aristotle.net Subject: RE: R��f. : 21EX sn 1836 w/ Varis 6.2.19 G'day, An interesting issue. (I guess) the PC-uP will have to decide on a packet-by-packet basis which packets it should ignore. We should therefore ensure that extraneous network traffic is kept out of the system. This involves a serious investment in infrastructure. Our system is probably over the top with that regard but I am V happy with it's operation. We have instituted three logical networks for our clinic. 1/ Admin. looked after by the hospital IT dept. 2/ VARiS. (three machines, 1 MLC, 2 PV) 3/ FOCUS planning. All are run off a fancy Cisco switch. Do not spare $$$$ here. You get what you pay for. The advantages are : a/ there is broadcast blocking from everywhere onto VARiS. b/ there is still connectability where (and when) it is required to radiology etc. Disadvantages: a/ It can be challenging mapping inter-subnet disks/printers. especially using NT4SP3. (Net use command in loggin script does wonders). :D >>> "Maddox, Buford J" 1/05/03 09:26:47 >>> We have experienced some timeout errors on a networked MLC when the network is hitting it too often, keeping the PC busy. -----Original Message----- From: normand_freniere_chrtr@ssss.gouv.qc.ca [mailto:normand_freniere_chrtr@ssss.gouv.qc.ca] Sent: Wednesday, April 30, 2003 2:00 PM To: linac-eng@plato.aristotle.net Cc: Stephen Jordan Subject: R��f. : 21EX sn 1836 w/ Varis 6.2.19 Steve, We did also get MLC Comm Timeout Error, but with Varis Treatment 6.2.27 (Portal Vision 6.1 app is also always running in the background). We get the error message for fields which have not portal scheduled. Unfortunately, we could not help you on an explanation and/or solution ... We are unable to reproduce the problem. It happens unpredictably. Varian is aware of the behavior, but because it can not be reproduce ... it is hard for everyone to trouble shoot. We also hope the forum can help! Normand Freni��re, M.Sc., MCCPM Medical physicist Centre Hospitalier R��gional de Trois-Rivi��res Radio-oncologie 1991 boul. du Carmel Trois-Rivi��res Qc G8Z 3R9 Courriel : normand_freniere_chrtr@ssss.gouv.qc.ca "Stephen Jordan" @plato.aristotle.net le 29/04/2003 03:54:46 PM Envoy�� par : owner-linac-eng@plato.aristotle.net Pour : cc : Objet : 21EX sn 1836 w/ Varis 6.2.19 I have an interesting problem I hope the forum can help with: When utilizing PortalVision (vers. 6.1), a MLC Comm Timeout Error is generated. This particular timeout does not occur unless the Portal Vision app is running. Thanks in advance for the help! Steve Jordan UAB Rad Physics ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 02 01:04:06 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BN5y-00004t-00; Fri, 02 May 2003 01:04:06 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id ADF4A1112F3; Fri, 2 May 2003 01:57:58 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA29052 for linac-eng-list; Thu, 1 May 2003 17:32:22 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail.mmci.org ([198.102.252.130]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA29048 for ; Thu, 1 May 2003 17:32:20 -0500 (CDT) Received: from GD_MHSC-MTA by mail.mmci.org with Novell_GroupWise; Thu, 01 May 2003 17:31:49 -0500 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Thu, 01 May 2003 17:31:34 -0500 From: "Kevin Milleson" To: Cc: , , Subject: Re: R.O. vs. distilled water Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 01 May 2003 17:31:34 -0500 From: "Kevin Milleson" To: Cc: , , Subject: Re: R.O. vs. distilled water Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Dave and all linac techs I maintain all types of water purification equipment here at Methodist Med Ctr. My experience is that all types of purified water(ae: RO,DI,Distilled) is very hostile to all metals except for Stainless steel. What we need to do is to find something that will kept what is called Bioslim to a min. We here at MMCI have 3 Linac where we using tap water of which we changing every 3 to 4 months. We where using DI Tanks until we had to replace a bend mag. on the 2100C. That my two cents Kevin Milleson Imaging Specialist Clincal Engineering Methodist Medical Center >>> Rich Kimball 05/01/03 06:27AM >>> Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to > be very aggressive. When they install these systems in your home they > use plastic tubing because it eats up the plumbing. This is what I am > told. Sounds like a interesting study. > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now > minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime > content, machine run time vs losses per hour, galvanic conduction and > repair cost vs losses. > Is there anything else from your experiences that you feel we should > include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available to > interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > > > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 02 08:10:34 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BTkg-0000nN-00; Fri, 02 May 2003 08:10:34 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id BF8531112F3; Fri, 2 May 2003 09:04:22 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id AAA05141 for linac-eng-list; Fri, 2 May 2003 00:46:35 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from smtp801.mail.sc5.yahoo.com (smtp801.mail.sc5.yahoo.com [66.163.168.180]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id AAA05137 for ; Fri, 2 May 2003 00:46:34 -0500 (CDT) Received: from adsl-216-103-85-50.dsl.snfc21.pacbell.net (HELO REIDGPC1) (dgreco@pacbell.net@216.103.85.50 with login) by smtp-sbc-v1.mail.vip.sc5.yahoo.com with SMTP; 2 May 2003 05:46:33 -0000 From: "Domenic Greco" To: "Kevin Milleson" , Cc: , , Subject: RE: R.O. vs. distilled water Date: Thu, 1 May 2003 22:47:04 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Domenic Greco" To: "Kevin Milleson" , Cc: , , Subject: RE: R.O. vs. distilled water Date: Thu, 1 May 2003 22:47:04 -0700 X-Priority: 3 (Normal) X-MSMail-Priority: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal Sender: owner-linac-eng@plato.aristotle.net Wow! Using tap water breaks all the rules in my mind. Can you explain what Bioslim is and how TAP water keeps it to a minimum? I know one thing tap water does not keep to a minimum and that is algae. I've done my share of scrubbing water tanks and flushing the system because customers inadvertently used tap water. Domenic Greco Accelinear Company Ltd. -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Kevin Milleson Sent: Thursday, May 01, 2003 3:32 PM To: rod.williams@phci.org Cc: richardkimball3@attbi.com; David.Burgess@cdha.nshealth.ca; linac-eng@plato.aristotle.net Subject: Re: R.O. vs. distilled water Dave and all linac techs I maintain all types of water purification equipment here at Methodist Med Ctr. My experience is that all types of purified water(ae: RO,DI,Distilled) is very hostile to all metals except for Stainless steel. What we need to do is to find something that will kept what is called Bioslim to a min. We here at MMCI have 3 Linac where we using tap water of which we changing every 3 to 4 months. We where using DI Tanks until we had to replace a bend mag. on the 2100C. That my two cents Kevin Milleson Imaging Specialist Clincal Engineering Methodist Medical Center >>> Rich Kimball 05/01/03 06:27AM >>> Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to > be very aggressive. When they install these systems in your home they > use plastic tubing because it eats up the plumbing. This is what I am > told. Sounds like a interesting study. > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now > minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime > content, machine run time vs losses per hour, galvanic conduction and > repair cost vs losses. > Is there anything else from your experiences that you feel we should > include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available to > interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > > > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 02 10:32:34 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BVy6-0002Ud-00; Fri, 02 May 2003 10:32:34 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2FCE61112F1; Fri, 2 May 2003 11:26:23 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id DAA06837 for linac-eng-list; Fri, 2 May 2003 03:02:21 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from holyrood.ed.ac.uk (holyrood.ed.ac.uk [129.215.16.14]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id DAA06833 for ; Fri, 2 May 2003 03:02:17 -0500 (CDT) Received: from lomond2 (lomond2.onc.ed.ac.uk [129.215.140.70]) by holyrood.ed.ac.uk (8.12.9/8.12.8) with SMTP id h42828vb017738; Fri, 2 May 2003 09:02:08 +0100 (BST) Message-ID: <003c01c31081$86df1ba0$468cd781@onc.ed.ac.uk> From: "Hamish Porter" To: "linac-eng" , "kim yeung" References: <002e01c30f3b$46b72280$7e09fea9@kyeung> Subject: Re: Varian EDW termination at wrong position Date: Fri, 2 May 2003 09:04:59 +0100 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0039_01C31089.E881F1E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Hamish Porter" To: "linac-eng" , "kim yeung" Subject: Re: Varian EDW termination at wrong position Date: Fri, 2 May 2003 09:04:59 +0100 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0039_01C31089.E881F1E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Kim This seems very unusual behaviour. Do you mean that the EDW log of the = actuals positions showed 0.48 cm as the final field size but the = diaphragms actually stopped 1 cm short of this ?=20 Could you send the DLOG to the mailbase as an attachment I am sure that = some of us would like to look at this. If this were the case you should = have had a DPSN as the dose-position locus would be outside the "cold = window" and beam hold-off alone could not correct for the position = error.=20 Hamish Porter Edinburgh Cancer Centre Western General Hospital Edinburgh. Scotland hporter@holyrood .ed.ac.uk ----- Original Message -----=20 From: kim yeung=20 To: linac-eng=20 Sent: Wednesday, April 30, 2003 6:09 PM Subject: Re: Varian EDW termination at wrong position Hi Colleagues, =20 Varian Clinac, 2300CD & 600CD Version 6.1 =20 We had several reports of wrong position termination of EDW on our = 2300CD and 600CD. In these incidents, the moving jaw stopped about 1cm = before its designated position (i.e. at 1.4cm instead of 0.5cm) and the = MU was okay, the Clinac did not show any interlocks. The EDW log showed = the treatment was complete in normal way, the moving jaw stopped at = 0.48cm, i.e. within MU and position tolerances. =20 Does anyone have such experience before? =20 Could anyone advise the following:- 1. The sampling mechanism of the dynamic log; 2. The tripping nature of DPSN; and 3. EDW termination mechanism. =20 Thanks in advance. =20 Kim Yeung ------=_NextPart_000_0039_01C31089.E881F1E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Kim

This seems very unusual behaviour. Do = you mean that=20 the EDW log of the actuals positions showed 0.48 cm as the final field = size but=20 the diaphragms actually stopped 1 cm short of this ?

Could you send the DLOG to the mailbase = as an=20 attachment I am sure that some of us would like to look at this. If this = were=20 the case you should have had a DPSN as the dose-position locus would be = outside=20 the "cold window" and beam hold-off alone could not correct for the = position=20 error.

Hamish Porter

Edinburgh Cancer Centre

Western General Hospital

Edinburgh. Scotland

hporter@holyrood .ed.ac.uk

----- Original Message -----

From:=20 kim=20 yeung

To: linac-eng

Sent: Wednesday, April 30, 2003 = 6:09=20 PM

Subject: Re: Varian EDW = termination at=20 wrong position

Hi Colleagues,

Varian Clinac, = 2300CD &=20 600CD Version 6.1

We had several reports of wrong = position=20 termination of EDW on our 2300CD and 600CD. In these incidents, the = moving jaw=20 stopped about 1cm before its designated position (i.e. at 1.4cm = instead=20 of 0.5cm) and the MU was okay, the Clinac did not show any=20 interlocks. The EDW log showed the treatment was complete in normal way, = the moving=20 jaw stopped at 0.48cm, i.e. within MU and position = tolerances.

Does anyone have such experience=20 before?

Could anyone advise the = following:-

1. The sampling mechanism of the = dynamic=20 log;

2. The tripping nature of DPSN; = and

3. EDW termination = mechanism.

Thanks in advance.

Kim = Yeung

------=_NextPart_000_0039_01C31089.E881F1E0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 02 13:09:03 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BYPX-0004mH-00; Fri, 02 May 2003 13:09:03 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 1271C1112F1; Fri, 2 May 2003 14:02:53 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id FAA09286 for linac-eng-list; Fri, 2 May 2003 05:37:05 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail9.nhs.uk (mail9.nhs.uk [213.120.235.87]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id FAA09282 for ; Fri, 2 May 2003 05:37:03 -0500 (CDT) Received: from [194.62.42.123] (helo=relayint1.nhs.uk) by mail9.nhs.uk with esmtp (Exim 4.10) id 19BXu4-0001K6-00 for linac-eng@plato.aristotle.net; Fri, 02 May 2003 11:36:32 +0100 Received: from relay.nhs.uk (194.62.42.142) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E60771200A1A6D0 for linac-eng@plato.aristotle.net; Fri, 2 May 2003 11:36:32 +0100 Received: from relay.wales.nhs.uk (194.189.180.1) by relay.nhs.uk (Syntegra-2 7.0.008) id 3EA9295F00158347 for linac-eng@plato.aristotle.net; Fri, 2 May 2003 11:36:32 +0100 X-Internal-ID: 3EB0FDC00000C421 Received: from ygc-mail.cd-tr.wales.nhs.uk (131.3.9.10) by relay.wales.nhs.uk (NPlex 2.0.108) for linac-eng@plato.aristotle.net; 2 May 2003 11:33:56 +0100 Received: by YGC-MAIL with Internet Mail Service (5.5.2653.19) id ; Fri, 2 May 2003 11:37:03 +0100 Message-ID: <4BD1673C955CD41182DA00508BACF2DF01BD5280@YGC-MAIL> From: "Jordan, Tom" To: linac-eng Subject: RE: Varian EDW termination at wrong position Date: Fri, 2 May 2003 11:36:55 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f X-Internal-ID: 3EB0FDC00000C421 From: "Jordan, Tom" To: linac-eng Subject: RE: Varian EDW termination at wrong position Date: Fri, 2 May 2003 11:36:55 +0100 Sender: owner-linac-eng@plato.aristotle.net Can I make the silly suggestion. It's not possibly that the default time is too short?? Tom > -----Original Message----- > From: Hamish Porter [SMTP:hporter@holyrood.ed.ac.uk] > Sent: 02 May 2003 09:05 > To: linac-eng; kim yeung > Subject: Re: Varian EDW termination at wrong position > > Hi Kim > > This seems very unusual behaviour. Do you mean that the EDW log of the > actuals positions showed 0.48 cm as the final field size but the > diaphragms actually stopped 1 cm short of this ? > > Could you send the DLOG to the mailbase as an attachment I am sure that > some of us would like to look at this. If this were the case you should > have had a DPSN as the dose-position locus would be outside the "cold > window" and beam hold-off alone could not correct for the position error. > > Hamish Porter > > Edinburgh Cancer Centre > Western General Hospital > Edinburgh. Scotland > hporter@holyrood .ed.ac.uk > > > > ----- Original Message ----- > From: kim yeung > To: linac-eng > Sent: Wednesday, April 30, 2003 6:09 PM > Subject: Re: Varian EDW termination at wrong position > > Hi Colleagues, > > Varian Clinac, 2300CD & 600CD Version 6.1 > > We had several reports of wrong position termination of EDW on our > 2300CD and 600CD. In these incidents, the moving jaw stopped about 1cm > before its designated position (i.e. at 1.4cm instead of 0.5cm) and the MU > was okay, the Clinac did not show any interlocks. The EDW log showed the > treatment was complete in normal way, the moving jaw stopped at 0.48cm, > i.e. within MU and position tolerances. > > Does anyone have such experience before? > > Could anyone advise the following:- > 1. The sampling mechanism of the dynamic log; > 2. The tripping nature of DPSN; and > 3. EDW termination mechanism. > > Thanks in advance. > > Kim Yeung > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 02 14:31:32 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BZhM-0006Cs-00; Fri, 02 May 2003 14:31:32 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 200681112F2; Fri, 2 May 2003 15:25:19 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA10476 for linac-eng-list; Fri, 2 May 2003 07:02:01 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA10472 for ; Fri, 2 May 2003 07:01:59 -0500 (CDT) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Fri, 02 May 2003 09:00:19 -0300 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Date: Fri, 02 May 2003 09:00:14 -0300 From: "Carl Murphy" To: , Subject: Re: R.O. vs. distilled water Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA10473 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 02 May 2003 09:00:14 -0300 From: "Carl Murphy" To: , Subject: Re: R.O. vs. distilled water Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA10473 Sender: owner-linac-eng@plato.aristotle.net I agree with Dave. There comes a point where water becomes "saturated" with ions and tends to leech out less copper and other minerals. I do think the best way to keep the water clean is to use a UV filter to kill bacteria, and only change the water when the conductivity is too high and BMAG interlocks occur. Sorry, not a fan of the gunk (...did you ever read the MSDS on that??!! Holy cr@p! That's nasty stuff!). As usual, any thing I say can be plausibly denied at my employers convenience. Carl Murphy _________________________________ Carl Murphy, C.E.T. Linear Accelerator Service Technologist Medical Physics Department Nova Scotia Cancer Centre QEII Health Sciences Centre Halifax, Nova Scotia, Canada Email: carl.murphy@cdha.nshealth.ca >>> "Dave Pinchin" Thursday, May 01, 2003 >>> G'day, I may be wrong here but it is my understanding that the reason RO water is so aggressive is that it is so pure. It tears ions out of stuff to dilute itself. Therefore, distilled water is going to be no less aggressive. It could even be MORE aggressive if it were distilled properly. We use V's recommendations here. Good, clean, pure triple RO water and then throw some nasty gunk into it to impurify it again............ It makes sense. Dave. >>> Rich Kimball 1/05/03 23:27:40 >>> Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to > be very aggressive. When they install these systems in your home they > use plastic tubing because it eats up the plumbing. This is what I am > told. Sounds like a interesting study. > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now > minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime > content, machine run time vs losses per hour, galvanic conduction and > repair cost vs losses. > Is there anything else from your experiences that you feel we should > include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available to > interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > > > ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 02 14:33:20 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BZj6-0006Db-00; Fri, 02 May 2003 14:33:20 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id D9DA71112F2; Fri, 2 May 2003 15:27:07 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA10560 for linac-eng-list; Fri, 2 May 2003 07:09:07 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail4.nhs.uk (mail4.nhs.uk [194.72.23.241]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA10556 for ; Fri, 2 May 2003 07:09:05 -0500 (CDT) Received: from hn-ext by mail4.nhs.uk (Sendmail 8.8.8) with esmtp id 19BZL7-00067v-00; Fri, 02 May 2003 13:08:33 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E60771200A21DCF for linac-eng@plato.aristotle.net; Fri, 2 May 2003 13:08:33 +0100 Received: from smtp.leedsth.nhs.uk (163.160.107.2) by relay.nhs.uk (Syntegra-4 7.0.008) (authenticated as smtp_leedsth_nhs_uk@es2002.nhs.uk) id 3EA928AC00132763 for linac-eng@plato.aristotle.net; Fri, 2 May 2003 13:08:33 +0100 Received: from LTH-MTA by smtp.leedsth.nhs.uk with Novell_GroupWise; Fri, 02 May 2003 13:09:17 +0100 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Fri, 02 May 2003 13:09:05 +0100 From: "Steve Watkins" To: " Subject: Water in pipes Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA10557 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 02 May 2003 13:09:05 +0100 From: "Steve Watkins" To: " Subject: Water in pipes Content-Disposition: inline X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id HAA10557 Sender: owner-linac-eng@plato.aristotle.net Below are the ramblings of a friendly research chemist aquaintance who has never heard of a linac and lives an anonymous quiet life in a lab in deepest europe...probably in a white coat... in response to G'day, I may be wrong here but it is my understanding that the reason RO water is so aggressive is that it is so pure. It tears ions out of stuff to dilute itself. Therefore, distilled water is going to be no less aggressive. It could even be MORE aggressive if it were distilled properly. We use V's recommendations here. Good, clean, pure triple RO water and then throw some nasty gunk into it to impurify it again............ It makes sense. Dave. He responded First q:what temps does this water reach?obviously the stripping ability is related to temperature (as things usually go faster when hot).He may have a point when you consider 100% copper pipes but it makes no sense triply distilling it then undistilling(waste of time).One downside of using tap water is that the pipes may become blocked as all the crud precipitates out under heat/pressure.(not sure of pipe bore) thus distillation helps. As an intermediate step you could try singly distilled water as the stripping ability will be less(ie more disolved copper) Another important parameter is pH-more acidic faster pipe will disolve test water with pH meter calibrated with pH7 buffer beforehand as scale is logarithmic.The logical test would be to find out the average Cu(2+) concentration (probably few ppm) then add an inert chemical such as copper sulphate(though water may turn blue( I cant remember)) and use this(I guess this could be worded gunk as described above) Anonymous Chemist,Holland. The above is in no way my view as a humble non-chemical linac engineer but an insight into the workings of a chemists mind...usually only witnessed on tv ads demonstrating the latest washing powders. steve uk 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 02 15:13:16 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BaLj-0006dq-00; Fri, 02 May 2003 15:13:15 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8D3441112F1; Fri, 2 May 2003 16:07:02 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA11388 for linac-eng-list; Fri, 2 May 2003 07:44:50 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from intfw2.phci.org (user.phci.org [207.67.109.70]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA11376 for ; Fri, 2 May 2003 07:44:46 -0500 (CDT) Received: from intfw2.phci.org (root@localhost) by intfw2.phci.org with ESMTP id h42CiFqV018458 for ; Fri, 2 May 2003 07:44:15 -0500 (CDT) Received: from zixvpm00.phci.org (zixvpm01.phci.org [172.20.3.21]) by intfw2.phci.org with ESMTP id h42CiFNM018445 for ; Fri, 2 May 2003 07:44:15 -0500 (CDT) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by Outbound.phci.org (Proprietary) with ESMTP id 483B61A408E for ; Fri, 2 May 2003 07:44:15 -0500 (CDT) Received: from rwdmail.phci.org (smtpscan.phci.org [172.20.3.10]) by zixvpm00.phci.org (Proprietary) with SMTP id 60DA41A004A for ; Fri, 2 May 2003 07:44:14 -0500 (CDT) Received: through eSafe SMTP Relay 1051114651; Fri May 02 06:06:59 2003 Received: by rwdmail.phci.org with Internet Mail Service (5.5.2653.19) id <20WAG3BA>; Fri, 2 May 2003 06:11:14 -0500 Message-ID: <7A3389A8D723D511B2260008C7B2BF390D60ED@wmhmail.phci.org> From: "Williams, Rod" To: linac-eng@plato.aristotle.net Subject: RE: Elaborate water study Date: Fri, 2 May 2003 06:06:58 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C3109A.F2C8F4D0" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Williams, Rod" To: linac-eng@plato.aristotle.net Subject: RE: Elaborate water study Date: Fri, 2 May 2003 06:06:58 -0500 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C3109A.F2C8F4D0 Content-Type: text/plain; charset="iso-8859-1" How about a timer on the pump. It would shut it down at night and turn on early enough to warm the water up in the AM. ???? It would certainly find all those weak pumps out there. -----Original Message----- From: Dave Pinchin [mailto:Dave.Pinchin@cdhb.govt.nz] Sent: Thursday, May 01, 2003 3:35 PM To: David.Smith@arh.grampian.scot.nhs.uk; linac-eng@plato.aristotle.net Subject: RE: Elaborate water study G'day, Here's an interesting point. The water rushes round dragging in stray ions of copper. It is no longer pure. It no longer drags in stray ions of copper. The problem arises when regular water changes are REQUIRED. Our site had trouble with BMAG interlock. We were able to keep the machine under control by replacing the water every 6 months. We have had 2 BMAG leaks and a kly sol leak. PS. the BMAG problem has been resolved and we now run the goop protocol. :D >>> 2/05/03 00:43:48 >>> We used RO water with no additives on an Elekta SL75 and an ABB CH20 for 23 combined machine years with no problems. The secret was to only ever top up to account for evaporation therefore limiting the waters ability to leach copper. We never did routine complete water changes. > -----Original Message----- > From: Williams, Rod [SMTP:rod.williams@phci.org] > Sent: Thursday, May 01, 2003 10:48 AM > To: 'David Burgess'; linac-eng@plato.aristotle.net > Subject: RE: Elaborate water study > > I am surprised you are using RO water. The stuff is supposed to be very > aggressive. When they install these systems in your home they use plastic > tubing because it eats up the plumbing. This is what I am told. Sounds > like a interesting study. > > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > > I'm part of a small group starting a detailed water analysis study > on Varian Clinacs. > The study purpose is to ensure copper and other machine losses are > now minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime content, > machine run time vs losses per hour, galvanic conduction and repair cost > vs losses. > Is there anything else from your experiences that you feel we > should include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at different > intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available > to interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > This email message may contain confidential information and is intended > only for the individual named. If you are not the named addressee you > should not disseminate, distribute or copy this email. Please notify the > sender immediately by email if you have received this email by mistake and > delete this email from your system. Email transmissions cannot be > guaranteed to be secure or error free as information could be intercepted, > corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. > The sender therefore does not accept any liability for errors or omissions > in the contents of this message that arise as a result of email > transmissions. If verification is required please request a hard copy > version. > > > > This information is confidential and intended solely for the use of the > individual or entity to whom it is addressed. > > If you have received this email in error please notify the sender or our > Help Desk at (262) 928-2777. > > > We have scanned this email and its attachments for malicious content. > > However, the recipient should check this email and any attachments for the > presence of viruses. > > ProHealth Care, Inc. accepts no liability for any damage caused by any > virus transmitted by this email. > > ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. ------_=_NextPart_001_01C3109A.F2C8F4D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable RE: Elaborate water study

How about a timer on the pump. It would shut it down at= night and turn on early enough to warm the water up in the AM. ???= ? It would certainly find all those weak pumps out there.

-----Original Message-----
From: Dave Pinchin [mailto:Dave.Pinchin@cdhb.govt.nz]
Sent: Thursday, May 01, 2003 3:35 PM
To: David.Smith@arh.grampian.scot.nhs.uk; linac-eng@pl= ato.aristotle.net
Subject: RE: Elaborate water study

G'day,
Here's an interesting point.
The water rushes round dragging in stray ions of coppe= r.
It is no longer pure.
It no longer drags in stray ions of copper.

The problem arises when regular water changes are REQUI= RED.

Our site had trouble with BMAG interlock. We were able = to keep the
machine under control by replacing the water every 6 m= onths.

We have had 2 BMAG leaks and a kly sol leak.

PS. the BMAG problem has been resolved and we now run t= he goop
protocol.

>>> <David.Smith@arh.grampian.scot.nhs.uk&g= t; 2/05/03 00:43:48 >>>
We used RO water with no additives on an Elekta SL75 a= nd an ABB CH20
for 23
combined machine years with no problems. The secret wa= s to only ever
top up
to account for evaporation therefore limiting the wate= rs ability to
leach
copper. We never did routine complete water changes.

> -----Original Message-----
> From: Williams, Rod [SMTP:rod.williams@phci.org] =
> Sent: Thursday, May 01, 2003 10:48 AM
> To:   'David Burgess'; linac-eng@plato.= aristotle.net
> Subject:      RE: Elabor= ate water study
>
> I am surprised you are using RO water. The stuff = is supposed to be
very
> aggressive. When they install these systems in yo= ur home they use
plastic
> tubing because it eats up the plumbing. This is w= hat I am told.
Sounds
> like a interesting study.
>
>
>
>       -----Original Mess= age-----
>       From: David Burges= s [mailto:David.Burgess= @cdha..nshealth.ca]
>       Sent: Wednesday, A= pril 30, 2003 10:59 AM
>       To: linac-eng@plat= o.aristotle.net
>       Subject: Elaborate= water study
>
>
>       I'm part of a smal= l group starting a detailed water analysis
study
> on Varian Clinacs.
>       The study purpose = is to ensure copper and other machine losses
are
> now minimized.
>       The study might in= clude a water chemical analysis, hose
> deteriation/longevity, sacrificial electrodes, bi= ological slime
content,
> machine run time vs losses per hour, galvanic con= duction and repair
cost
> vs losses.
>       Is there anything = else from your experiences that you feel we
> should include ?
>       I hope other clini= cs might be interested in contributing any
info or
> analysis data they have.
>       In Eastern Canada = a new machine will soon start up with the
water
> additive. Other machines here are using RO water = and flushing at
different
> intervals. There is a mix of LEs and HEs.
>       We also have a 8 y= ear old 2100C with new guide sled and new
Bending
> magnet.
>       The study duration= will be 3 years, with interim reports
available
> to interested parties. The final report will prob= ably be presented as
a
> paper to some physics/service gathering.
>       David Burgess
>       Nova Scotia Cancer= Centre
>       Halifax, Canada
>
> This email message may contain confidential infor= mation and is
intended
> only for the individual named. If you are not the= named addressee
you
> should not disseminate, distribute or copy this e= mail. Please notify
the
> sender immediately by email if you have received = this email by
mistake and
> delete this email from your system. Email transmi= ssions cannot be
> guaranteed to be secure or error free as informat= ion could be
intercepted,
> corrupted, lost, destroyed, arrive late or incomp= lete, or contain
viruses.
> The sender therefore does not accept any liabilit= y for errors or
omissions
> in the contents of this message that arise as a r= esult of email
> transmissions. If verification is required please= request a hard
copy
> version.        &nb= sp;
>
>
>
> This information is confidential and intended sol= ely for the use of
the
> individual or entity to whom it is addressed.
>
> If you have received this email in error please n= otify the sender or
our
> Help Desk at (262) 928-2777.
>
>
> We have scanned this email and its attachments fo= r malicious
content.
>
> However, the recipient should check this email an= d any attachments
for the
> presence of viruses.
>
> ProHealth Care, Inc. accepts no liability for any= damage caused by
any
> virus transmitted by this email.
>
>

*******************************************************= ***************
** This email and attachments have been scanned for co= ntent and viruses
and is believed to be clean **

This email or attachments may contain confidential or l= egally
privileged information intended for the sole use of th= e addressee(s).
Any use, redistribution, disclosure, or reproduction o= f this message,
except as intended, is prohibited. If you received thi= s email in error,
please notify the sender and remove all copies of the = message,
including any attachments. Any views or opinions expre= ssed in this
email (unless otherwise stated) may not represent thos= e of Canterbury
District Health Board
******************************************************= ****************

This information is confidential and intended solely fo= r the use of the individual or entity to whom it is addressed.
If you have received this email in error please notify= the sender or our Help Desk at (262) 928-2777.

We have scanned this email and its attachments for mali= cious content.
However, the recipient should check this email and any= attachments for the presence of viruses.
ProHealth Care, Inc. accepts no liability for any dama= ge caused by any virus transmitted by this email.

------_=_NextPart_001_01C3109A.F2C8F4D0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 02 15:13:25 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BaLt-0006e2-00; Fri, 02 May 2003 15:13:25 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 595C11112F1; Fri, 2 May 2003 16:07:09 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA11389 for linac-eng-list; Fri, 2 May 2003 07:44:50 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from intfw2.phci.org (user.phci.org [207.67.109.70]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA11383 for ; Fri, 2 May 2003 07:44:48 -0500 (CDT) Received: from intfw2.phci.org (root@localhost) by intfw2.phci.org with ESMTP id h42CiDvS018437 for ; Fri, 2 May 2003 07:44:13 -0500 (CDT) Received: from zixvpm00.phci.org (zixvpm01.phci.org [172.20.3.21]) by intfw2.phci.org with ESMTP id h42CiDNM018434 for ; Fri, 2 May 2003 07:44:13 -0500 (CDT) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by Outbound.phci.org (Proprietary) with ESMTP id 7D5F81A4088 for ; Fri, 2 May 2003 07:44:13 -0500 (CDT) Received: from rwdmail.phci.org (smtpscan.phci.org [172.20.3.10]) by zixvpm00.phci.org (Proprietary) with SMTP id 54D261A0049 for ; Fri, 2 May 2003 07:44:13 -0500 (CDT) Received: through eSafe SMTP Relay 1051114651; Fri May 02 06:03:31 2003 Received: by rwdmail.phci.org with Internet Mail Service (5.5.2653.19) id <20WAG3A9>; Fri, 2 May 2003 06:07:46 -0500 Message-ID: <7A3389A8D723D511B2260008C7B2BF390D60EC@wmhmail.phci.org> From: "Williams, Rod" To: linac-eng@plato.aristotle.net Subject: RE: R.O. vs. distilled water Date: Fri, 2 May 2003 06:03:29 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C3109A.768E4870" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Williams, Rod" To: linac-eng@plato.aristotle.net Subject: RE: R.O. vs. distilled water Date: Fri, 2 May 2003 06:03:29 -0500 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C3109A.768E4870 Content-Type: text/plain; charset="iso-8859-1" A friend put Distilled water in his fish tank and it pulled the color off all the plastic toy weeds and gravel. I wonder what the fish thought. -----Original Message----- From: Domenic Greco [mailto:dgreco@pacbell.net] Sent: Friday, May 02, 2003 12:47 AM To: Kevin Milleson; rod.williams@phci.org Cc: richardkimball3@attbi.com; David.Burgess@cdha.nshealth.ca; linac-eng@plato.aristotle.net Subject: RE: R.O. vs. distilled water Wow! Using tap water breaks all the rules in my mind. Can you explain what Bioslim is and how TAP water keeps it to a minimum? I know one thing tap water does not keep to a minimum and that is algae. I've done my share of scrubbing water tanks and flushing the system because customers inadvertently used tap water. Domenic Greco Accelinear Company Ltd. -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Kevin Milleson Sent: Thursday, May 01, 2003 3:32 PM To: rod.williams@phci.org Cc: richardkimball3@attbi.com; David.Burgess@cdha.nshealth.ca; linac-eng@plato.aristotle.net Subject: Re: R.O. vs. distilled water Dave and all linac techs I maintain all types of water purification equipment here at Methodist Med Ctr. My experience is that all types of purified water(ae: RO,DI,Distilled) is very hostile to all metals except for Stainless steel. What we need to do is to find something that will kept what is called Bioslim to a min. We here at MMCI have 3 Linac where we using tap water of which we changing every 3 to 4 months. We where using DI Tanks until we had to replace a bend mag. on the 2100C. That my two cents Kevin Milleson Imaging Specialist Clincal Engineering Methodist Medical Center >>> Rich Kimball 05/01/03 06:27AM >>> Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to > be very aggressive. When they install these systems in your home they > use plastic tubing because it eats up the plumbing. This is what I am > told. Sounds like a interesting study. > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now > minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime > content, machine run time vs losses per hour, galvanic conduction and > repair cost vs losses. > Is there anything else from your experiences that you feel we should > include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available to > interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > > > This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. ------_=_NextPart_001_01C3109A.768E4870 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable RE: R.O. vs. distilled water

A friend put Distilled water in his fish tank and it pu= lled the color off all the plastic toy weeds and gravel. I wonder what th= e fish thought.

-----Original Message-----
From: Domenic Greco [mailto:dgreco@pacbell.net]
Sent: Friday, May 02, 2003 12:47 AM
To: Kevin Milleson; rod.williams@phci.org
Cc: richardkimball3@attbi.com; David.Burgess@cdha.nshe= alth.ca;
linac-eng@plato.aristotle.net
Subject: RE: R.O. vs. distilled water

Wow!
Using tap water breaks all the rules in my mind.
Can you explain what Bioslim is and how TAP water keep= s it to a minimum? I
know one thing tap water does not keep to a minimum an= d that is algae. I've
done my share of scrubbing water tanks and flushing th= e system because
customers inadvertently used tap water.

Domenic Greco
Accelinear Company Ltd.

-----Original Message-----
From: owner-linac-eng@plato.aristotle.net
[mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Kevin Mille= son
Sent: Thursday, May 01, 2003 3:32 PM
To: rod.williams@phci.org
Cc: richardkimball3@attbi.com; David.Burgess@cdha.nshe= alth.ca;
linac-eng@plato.aristotle.net
Subject: Re: R.O. vs. distilled water

Dave and all linac techs
I maintain all types of water purification equip= ment here at Methodist
Med Ctr. My experience is that all types of puri= fied water(ae:
RO,DI,Distilled) is very hostile to all metals except = for Stainless
steel. What we need to do is to find something that wi= ll kept what is
called Bioslim to a min. We here at MMCI have 3 Linac = where we using tap
water of which we changing every 3 to 4 months. = We where using DI Tanks
until we had to replace a bend mag. on the 2100C. = ; That my two
cents

Kevin Milleson
Imaging Specialist
Clincal Engineering
Methodist Medical Center

>>> Rich Kimball <richardkimball3@attbi.com= > 05/01/03 06:27AM >>>
Dave,
I would have to strongly advise against the use of rev= erse osmosis
water in a linac and agree with Rod!
Distilled water is the only type I would recommend.
Rich Kimball
Acceletronics Midwest, Inc.

On Thursday, May 1, 2003, at 04:47 AM, Williams, = Rod wrote:

> I am surprised you are using RO water. The stuff i= s supposed to
> be very aggressive. When they install these syste= ms in your home they

> use plastic tubing because it eats up the plumbing= =2E This is what I am

> told. Sounds like a interesting study.
>
>
> -----Original Message-----
> From: David Burgess [mailto:David.Burgess@cdha..nshealth.ca]
> Sent: Wednesday, April 30, 2003 10:59 AM
> To: linac-eng@plato.aristotle.net
> Subject: Elaborate water study
>
> I'm part of a small group starting a detailed wat= er analysis study on

> Varian Clinacs.
> The study purpose is to ensure copper and other m= achine losses are
now
> minimized.
> The study might include a water chemical analysis= , hose
> deteriation/longevity, sacrificial electrodes, bi= ological slime
> content, machine run time vs losses per hour, gal= vanic conduction and

> repair cost vs losses.
> Is there anything else from your experiences that= you feel we should

> include ?
> I hope other clinics might be interested in contr= ibuting any info or

> analysis data they have.
> In Eastern Canada a new machine will soon start u= p with the water
> additive. Other machines here are using RO water = and flushing at
> different intervals. There is a mix of LEs and HE= s.
> We also have a 8 year old 2100C with new guide sl= ed and new Bending
> magnet.
> The study duration will be 3 years, with interim = reports available to

> interested parties. The final report will probably= be presented as a

> paper to some physics/service gathering.
> David Burgess
> Nova Scotia Cancer Centre
> Halifax, Canada
>
<image.tiff>
>
>
>

------_=_NextPart_001_01C3109A.768E4870-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Sat May 03 10:36:14 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19BsVC-0000ep-00; Sat, 03 May 2003 10:36:14 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 921171112F1; Sat, 3 May 2003 10:29:59 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA15598 for linac-eng-list; Fri, 2 May 2003 10:47:03 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from ftwvir01.ftw.medcity.net (mail.ftw.medcity.net [199.91.36.30]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id KAA15594 for ; Fri, 2 May 2003 10:47:01 -0500 (CDT) Received: from 170.150.192.135 by ftwvir01.ftw.medcity.net (InterScan E-Mail VirusWall NT); Fri, 02 May 2003 10:46:19 -0500 Received: by smtp-gw.ftw.medcity.net with Internet Mail Service (5.5.2655.55) id ; Fri, 2 May 2003 10:42:20 -0500 Message-ID: <39A90AC123CB9D428821E2BC273E73CD01F8666B@ftwex03.ftw.medcity.net> From: Tirabassi Michael To: "Linac list (E-mail)" Cc: Barrett Marc Subject: NAI - II camera Date: Fri, 2 May 2003 10:42:57 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Tirabassi Michael To: "Linac list (E-mail)" Cc: Barrett Marc Subject: NAI - II camera Date: Fri, 2 May 2003 10:42:57 -0500 Sender: owner-linac-eng@plato.aristotle.net Hello, Anybody out there interested in a 93 model North American Imaging camera. Model AI -16- TVC. Just upgraded the imaging chain on our 93 OLDs (Oldelft Simulix MC). Original camera, original vidicon tube in good working condition when removed from machine. Have camera manual. Hate to just chunk something that still works. Would make a good back up or troubleshooting aid. Also is there anyone who collects old Image Intensifiers. Was working just weak. Same age as camera. Thanks, Mr. T. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 05 15:25:40 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19CfyO-0003wR-00; Mon, 05 May 2003 15:25:40 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8327B1112F1; Mon, 5 May 2003 15:19:15 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA13532 for linac-eng-list; Mon, 5 May 2003 07:51:31 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from sccrmhc01.attbi.com (sccrmhc01.attbi.com [204.127.202.61]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA13528 for ; Mon, 5 May 2003 07:51:30 -0500 (CDT) Received: from attbi.com (12-247-220-103.client.attbi.com[12.247.220.103]) by sccrmhc01.attbi.com (sccrmhc01) with SMTP id <2003050512505900100cto1se>; Mon, 5 May 2003 12:50:59 +0000 Date: Mon, 5 May 2003 07:50:57 -0500 Subject: Varian HE C3 KLM lift support Content-Type: text/plain; charset=US-ASCII; format=flowed Mime-Version: 1.0 (Apple Message framework v552) Cc: Rich Kimball To: Linac Engineer List From: Rich Kimball Content-Transfer-Encoding: 7bit Message-Id: <378F680E-7EF8-11D7-B792-000393BB5024@attbi.com> X-Mailer: Apple Mail (2.552) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 5 May 2003 07:50:57 -0500 Subject: Varian HE C3 KLM lift support Cc: Rich Kimball To: Linac Engineer List From: Rich Kimball Sender: owner-linac-eng@plato.aristotle.net Hi all, I recently went to pull a klystron and solenoid from a HE unit sn 12XX KLM style machine. It was discovered that there was NO overhead support bar nor was there a winch on site anywhere. (I should have checked before hand, but assumed it would be there). Was this lifting equipment somehow removed from site or is it that Varian doesn't ship this equipment with the machines anymore? I know that HE machines in the 800 series had this support and winch. If Varian did stop suppling these, does anyone know a cut off sn? We had to scramble some to get something that would work to pull out these devices. Thanks as always. Happy trails, Richard 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 05 16:29:39 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19CgyI-00053m-00; Mon, 05 May 2003 16:29:38 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 3C6481112F1; Mon, 5 May 2003 16:23:18 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA14685 for linac-eng-list; Mon, 5 May 2003 08:54:00 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail.cbdha.nshealth.ca (mail.cbdha.nshealth.ca [142.176.129.245]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA14681 for ; Mon, 5 May 2003 08:53:56 -0500 (CDT) Received: from ([128.222.7.122]) by mail.cbdha.nshealth.ca (Merak 4.2.3) with SMTP id LPA73855 for ; Mon, 05 May 2003 10:57:23 -0300 From: "Greg MacKinnon" To: "LinacEng" Subject: LCD Monitor in Treatment Room Date: Mon, 5 May 2003 10:53:27 -0300 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Greg MacKinnon" To: "LinacEng" Subject: LCD Monitor in Treatment Room Date: Mon, 5 May 2003 10:53:27 -0300 X-Priority: 3 (Normal) X-MSMail-Priority: Normal Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Hi Group; I am looking at replacing the in-room CRT monitor with a new LCD display. I was wondering if any clinics have LCD display inside the treatment rooms? If they do, where there any problems. Also, how long has the displays been in the treatment room? I had heard that after 6 to 8 months the displays would fail. Any comments on this would be appreciated. Thanks __________________________________________ Greg MacKinnon, C.E.T. Linear Accelerator Service Technologist Cape Breton Cancer Centre 1482 George Street Sydney, Nova Scotia, Canada B1P 1P3 tel: (902) 567-8076 fax: (902) 567-8075 email: mackinnongreg@cbdha.nshealth.ca 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 05 17:04:33 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19ChW4-0005c3-00; Mon, 05 May 2003 17:04:32 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 725671112F1; Mon, 5 May 2003 16:58:12 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA15629 for linac-eng-list; Mon, 5 May 2003 09:40:06 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from whses01.wellmont.org (whses01.wellmont.org [151.102.96.168]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA15624 for ; Mon, 5 May 2003 09:40:03 -0500 (CDT) Received: by whses01.wellmont.org with Internet Mail Service (5.5.2653.19) id ; Mon, 5 May 2003 10:39:29 -0400 Message-ID: <7AF61AA0D5DBD511B2990090274E73167969FF@whses02.wellmont.org> From: "Falcinelli, Marc A" To: "'Rich Kimball'" Cc: "'linac-eng@plato.aristotle.net'" Subject: RE: Varian HE C3 KLM lift support Date: Mon, 5 May 2003 10:39:26 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Falcinelli, Marc A" To: "'Rich Kimball'" Cc: "'linac-eng@plato.aristotle.net'" Subject: RE: Varian HE C3 KLM lift support Date: Mon, 5 May 2003 10:39:26 -0400 Sender: owner-linac-eng@plato.aristotle.net VMS stopped shipping the hoist and bar around the early 1000 serial numbers. I am not sure exactly which serial number was the cut-off. If you come across one from an old generation H.E. machine that is being removed and scrapped, I would hang on to it. -----Original Message----- From: Rich Kimball [mailto:richardkimball3@attbi.com] Sent: Monday, May 05, 2003 8:51 AM To: Linac Engineer List Cc: Rich Kimball Subject: Varian HE C3 KLM lift support Hi all, I recently went to pull a klystron and solenoid from a HE unit sn 12XX KLM style machine. It was discovered that there was NO overhead support bar nor was there a winch on site anywhere. (I should have checked before hand, but assumed it would be there). Was this lifting equipment somehow removed from site or is it that Varian doesn't ship this equipment with the machines anymore? I know that HE machines in the 800 series had this support and winch. If Varian did stop suppling these, does anyone know a cut off sn? We had to scramble some to get something that would work to pull out these devices. Thanks as always. Happy trails, Richard 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 05 19:25:43 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Cjih-0006DN-00; Mon, 05 May 2003 19:25:43 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 97DC01112F1; Mon, 5 May 2003 19:19:20 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id LAA18038 for linac-eng-list; Mon, 5 May 2003 11:48:05 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail.med.cornell.edu (mail.med.cornell.edu [140.251.3.3]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id LAA18033 for ; Mon, 5 May 2003 11:48:03 -0500 (CDT) Received: from nyp.org ([140.251.230.211]) by mail.med.cornell.edu (Netscape Messaging Server 3.6) with ESMTP id AAA56E90 for ; Mon, 5 May 2003 12:48:00 -0400 Message-ID: <3EB695B6.3FFAA126@nyp.org> Date: Mon, 05 May 2003 12:47:50 -0400 From: "James Vieira" Reply-To: jav9007@nyp.org Organization: NewYork-Presbyterian Hospital X-Mailer: Mozilla 4.7 [en]C-CCK-MCD (WinNT; U) X-Accept-Language: en MIME-Version: 1.0 To: LINAC-ENG@plato.aristotle.net Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 05 May 2003 12:47:50 -0400 From: "James Vieira" Reply-To: jav9007@nyp.org Organization: NewYork-Presbyterian Hospital X-Accept-Language: en To: LINAC-ENG@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net Hello everyone, Just seeing if anyone out there knows where I can find a 45deg MLC 20x40cm lead wedge. The part number I need is 1102093-01A as stamped on the wedge itself. This is for a Varian 2100CD #643. The new 45deg wedge that was purchased afterward has a different transmission factor. Thanks Jim Vieira New York Hospital e-mail: jav9007@nyp.org 212-746-3604 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 05 20:09:51 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19CkPP-0006Iw-00; Mon, 05 May 2003 20:09:51 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 203021112F1; Mon, 5 May 2003 20:03:28 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA19112 for linac-eng-list; Mon, 5 May 2003 12:38:47 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from rwcrmhc52.attbi.com (rwcrmhc52.attbi.com [216.148.227.88]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA19107 for ; Mon, 5 May 2003 12:38:45 -0500 (CDT) Received: from attbi.com (12-247-220-103.client.attbi.com[12.247.220.103]) by rwcrmhc52.attbi.com (rwcrmhc52) with SMTP id <2003050517380405200dqpq2e>; Mon, 5 May 2003 17:38:04 +0000 Date: Mon, 5 May 2003 12:38:01 -0500 Subject: Re: Varian HE C3 KLM lift support Content-Type: text/plain; charset=US-ASCII; format=flowed Mime-Version: 1.0 (Apple Message framework v552) Cc: Rich Kimball , "'linac-eng@plato.aristotle.net'" To: "Falcinelli, Marc A" From: Rich Kimball In-Reply-To: <7AF61AA0D5DBD511B2990090274E73167969FF@whses02.wellmont.org> Message-Id: <51D0946E-7F20-11D7-870E-000393BB5024@attbi.com> Content-Transfer-Encoding: 7bit X-Mailer: Apple Mail (2.552) Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 5 May 2003 12:38:01 -0500 Subject: Re: Varian HE C3 KLM lift support Cc: Rich Kimball , "'linac-eng@plato.aristotle.net'" To: "Falcinelli, Marc A" From: Rich Kimball In-Reply-To: <7AF61AA0D5DBD511B2990090274E73167969FF@whses02.wellmont.org> Sender: owner-linac-eng@plato.aristotle.net Thanks Marc. That's good to know (well not maybe good....but so noted) :-) Rich On Monday, May 5, 2003, at 09:39 AM, Falcinelli, Marc A wrote: > VMS stopped shipping the hoist and bar around the early 1000 serial > numbers. > I am not sure exactly which serial number was the cut-off. If you come > across one from an old generation H.E. machine that is being removed > and > scrapped, I would hang on to it. > > -----Original Message----- > From: Rich Kimball [mailto:richardkimball3@attbi.com] > Sent: Monday, May 05, 2003 8:51 AM > To: Linac Engineer List > Cc: Rich Kimball > Subject: Varian HE C3 KLM lift support > > Hi all, > I recently went to pull a klystron and solenoid from a HE unit sn 12XX > KLM style machine. It was discovered that there was NO overhead > support bar nor was there a winch on site anywhere. (I should have > checked before hand, but assumed it would be there). > Was this lifting equipment somehow removed from site or is it that > Varian doesn't ship this equipment with the machines anymore? > > I know that HE machines in the 800 series had this support and winch. > If Varian did stop suppling these, does anyone know a cut off sn? > > We had to scramble some to get something that would work to pull out > these devices. > > Thanks as always. > Happy trails, > Richard > > Happy trails, Richard 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 05 23:25:50 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19CnT4-0006jo-00; Mon, 05 May 2003 23:25:50 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 4E1ED1112F2; Mon, 5 May 2003 23:19:28 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id PAA25151 for linac-eng-list; Mon, 5 May 2003 15:59:53 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA25147 for ; Mon, 5 May 2003 15:59:45 -0500 (CDT) Received: from Mailsweeper2.chhlth.govt.nz (mailsweeper2.chhlth.govt.nz [159.117.18.162]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h45KxdmG019453 for ; Tue, 6 May 2003 08:59:43 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper2.chhlth.govt.nz (Content Technologies SMTPRS 4.2.10) with ESMTP id for ; Tue, 6 May 2003 09:01:46 +1200 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Tue, 06 May 2003 08:59:03 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Tue, 06 May 2003 08:58:53 +1200 From: "Dave Pinchin" To: , Subject: Re: R.O. vs. distilled water Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 06 May 2003 08:58:53 +1200 From: "Dave Pinchin" To: , Subject: Re: R.O. vs. distilled water Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day all, Just a little extra. The BMAG interlock problem at Christchurch (2100 #40) turned out to be the power supply not stable at LOW outputs. All better now with new model PSU. :D >>> "Carl Murphy" 3/05/03 00:00:14 >>> I agree with Dave. There comes a point where water becomes "saturated" with ions and tends to leech out less copper and other minerals. I do think the best way to keep the water clean is to use a UV filter to kill bacteria, and only change the water when the conductivity is too high and BMAG interlocks occur. Sorry, not a fan of the gunk (...did you ever read the MSDS on that??!! Holy cr@p! That's nasty stuff!). As usual, any thing I say can be plausibly denied at my employers convenience. Carl Murphy _________________________________ Carl Murphy, C.E.T. Linear Accelerator Service Technologist Medical Physics Department Nova Scotia Cancer Centre QEII Health Sciences Centre Halifax, Nova Scotia, Canada Email: carl.murphy@cdha.nshealth.ca >>> "Dave Pinchin" Thursday, May 01, 2003 >>> G'day, I may be wrong here but it is my understanding that the reason RO water is so aggressive is that it is so pure. It tears ions out of stuff to dilute itself. Therefore, distilled water is going to be no less aggressive. It could even be MORE aggressive if it were distilled properly. We use V's recommendations here. Good, clean, pure triple RO water and then throw some nasty gunk into it to impurify it again............ It makes sense. Dave. >>> Rich Kimball 1/05/03 23:27:40 >>> Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to > be very aggressive. When they install these systems in your home they > use plastic tubing because it eats up the plumbing. This is what I am > told. Sounds like a interesting study. > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now > minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime > content, machine run time vs losses per hour, galvanic conduction and > repair cost vs losses. > Is there anything else from your experiences that you feel we should > include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available to > interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > > > ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 05 23:31:40 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19CnYi-0006kD-00; Mon, 05 May 2003 23:31:40 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 1B4BE1112F2; Mon, 5 May 2003 23:25:19 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id PAA25037 for linac-eng-list; Mon, 5 May 2003 15:51:49 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from titan.lhsc.on.ca (titan.lhsc.on.ca [142.158.2.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA25033 for ; Mon, 5 May 2003 15:51:48 -0500 (CDT) From: Randy.McVittie@lrcc.on.ca Received: from mail.lrcc.on.ca (mail.lrcc.on.ca [142.158.120.242]) by titan.lhsc.on.ca (8.11.6+Sun/8.11.6) with SMTP id h45KpFS07541; Mon, 5 May 2003 16:51:15 -0400 (EDT) Received: by mail.lrcc.on.ca(Lotus SMTP MTA v4.6.7 (934.1 12-30-1999)) id 85256D1D.00726010 ; Mon, 5 May 2003 16:49:16 -0400 X-Lotus-FromDomain: LRCC To: "Williams, Rod" Cc: linac-eng@plato.aristotle.net Message-ID: <85256D1D.00725E3B.00@mail.lrcc.on.ca> Date: Mon, 5 May 2003 16:49:11 -0400 Subject: RE: R.O. vs. distilled water Mime-Version: 1.0 Content-type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Randy.McVittie@lrcc.on.ca X-Lotus-FromDomain: LRCC To: "Williams, Rod" Cc: linac-eng@plato.aristotle.net Date: Mon, 5 May 2003 16:49:11 -0400 Subject: RE: R.O. vs. distilled water Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net There are 7 Varian 2100CD's at our site. Last summer we lost a target and had extensive water in our accelerator. This machine was running with a Culligan/US Filter De-Ionizer bed for the past 6 years. Having such a failure made us think about the water systems since two of our older 2100's are not using the Culligan system and they are running just fine, no target leaks for several years. I took water samples from all 7 of our machines and measured the water conductivity to see what kind of range we had among our machines to see if this would correlate with any machine problems like BMAGs etc. |-------------------------+-------------------------+-------------------------| |Machine |Measured uS/cm |Calculated Resistance | |-------------------------+-------------------------+-------------------------| |21A |33.2 |30kOhm | |-------------------------+-------------------------+-------------------------| |21B |22.6 |44kOhm | |-------------------------+-------------------------+-------------------------| |21C |1.03 |970kOhm | |-------------------------+-------------------------+-------------------------| |21D |1.93 |518kOhm | |-------------------------+-------------------------+-------------------------| |21E |19.7 |50kOhm | |-------------------------+-------------------------+-------------------------| |21F |11 |90kOhm | |-------------------------+-------------------------+-------------------------| |21G |13 |76kOhm | |-------------------------+-------------------------+-------------------------| | | | | |-------------------------+-------------------------+-------------------------| As you can see there is a very wide range in the "purity" of the water. The 21A with the lowest "purity" is not exhibiting any odd problems that could in any way be attributed to bad water. Another concern we have here is with the chemicals. If you use pure water and you get a leak to the high vacuum you pump the system down and re-establish high vacuum. What happens when you introduce a corrosive chemical to your water and then get a vacuum leak? What happens to the inside of your guide if this mixture is filling your guide for a weekend (lets say the target fails 21:00 on a Friday night and nobody notices until Monday at 07:00)? I would also use this argument for anyone thinking about using glycol or any other solution in the cooling system. It may have fine thermodynamic properties, but when it gets into your high vacuum stuff, can you get it back out or do you have to scrap your accelerator? I think it is a given fact that the target will fail at some point in time and that when this happens you will end up with water in your waveguide, water is a pain to get out, but it can be done. We have removed our deionizers since last fall and there have been no problems with the machines. I have checked the resistance of the water on a couple of machines and it has come down since the de-ionizer was removed as you would expect. Maybe the water doesn't have to be >100kOhm/cm, maybe 20kOhm/cm is fine? As for fungus/algae growing in the water system, we have not had a problem here in 8 years with any of our machines. I did see a fungus/algae problem on a 4/100 about 10 years ago and I think that was due to the pump being contaminated in the factory. Once the system was flushed and thoroughly clean, plain distilled water was added and we were fine for years. Randy McVittie London Regional Cancer Centre London, Ontario 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 00:06:39 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Co6Z-0006n3-00; Tue, 06 May 2003 00:06:39 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E43341112F2; Tue, 6 May 2003 00:00:17 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id QAA26372 for linac-eng-list; Mon, 5 May 2003 16:37:05 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA26367 for ; Mon, 5 May 2003 16:37:02 -0500 (CDT) Received: from Mailsweeper2.chhlth.govt.nz (mailsweeper2.chhlth.govt.nz [159.117.18.162]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h45Lb6mG024545 for ; Tue, 6 May 2003 09:37:06 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper2.chhlth.govt.nz (Content Technologies SMTPRS 4.2.10) with ESMTP id for ; Tue, 6 May 2003 09:39:14 +1200 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Tue, 06 May 2003 09:36:31 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Tue, 06 May 2003 09:36:27 +1200 From: "Dave Pinchin" To: , Subject: RE: Elaborate water study Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 06 May 2003 09:36:27 +1200 From: "Dave Pinchin" To: , Subject: RE: Elaborate water study Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, This one's not getting my vote. The whole system would lose temperature stability and cause heating / cooling leaks all round. Including the vacuum system. I'd ratyher have to replace the BMAG every 10 yrs. :( >>> "Williams, Rod" 2/05/03 23:06:58 >>> How about a timer on the pump. It would shut it down at night and turn on early enough to warm the water up in the AM. ???? It would certainly find all those weak pumps out there. -----Original Message----- From: Dave Pinchin [mailto:Dave.Pinchin@cdhb.govt.nz] Sent: Thursday, May 01, 2003 3:35 PM To: David.Smith@arh.grampian.scot.nhs.uk; linac-eng@plato.aristotle.net Subject: RE: Elaborate water study G'day, Here's an interesting point. The water rushes round dragging in stray ions of copper. It is no longer pure. It no longer drags in stray ions of copper. The problem arises when regular water changes are REQUIRED. Our site had trouble with BMAG interlock. We were able to keep the machine under control by replacing the water every 6 months. We have had 2 BMAG leaks and a kly sol leak. PS. the BMAG problem has been resolved and we now run the goop protocol. :D >>> 2/05/03 00:43:48 >>> We used RO water with no additives on an Elekta SL75 and an ABB CH20 for 23 combined machine years with no problems. The secret was to only ever top up to account for evaporation therefore limiting the waters ability to leach copper. We never did routine complete water changes. > -----Original Message----- > From: Williams, Rod [SMTP:rod.williams@phci.org] > Sent: Thursday, May 01, 2003 10:48 AM > To: 'David Burgess'; linac-eng@plato.aristotle.net > Subject: RE: Elaborate water study > > I am surprised you are using RO water. The stuff is supposed to be very > aggressive. When they install these systems in your home they use plastic > tubing because it eats up the plumbing. This is what I am told. Sounds > like a interesting study. > > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > > I'm part of a small group starting a detailed water analysis study > on Varian Clinacs. > The study purpose is to ensure copper and other machine losses are > now minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime content, > machine run time vs losses per hour, galvanic conduction and repair cost > vs losses. > Is there anything else from your experiences that you feel we > should include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at different > intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available > to interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > This email message may contain confidential information and is intended > only for the individual named. If you are not the named addressee you > should not disseminate, distribute or copy this email. Please notify the > sender immediately by email if you have received this email by mistake and > delete this email from your system. Email transmissions cannot be > guaranteed to be secure or error free as information could be intercepted, > corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. > The sender therefore does not accept any liability for errors or omissions > in the contents of this message that arise as a result of email > transmissions. If verification is required please request a hard copy > version. > > > > This information is confidential and intended solely for the use of the > individual or entity to whom it is addressed. > > If you have received this email in error please notify the sender or our > Help Desk at (262) 928-2777. > > > We have scanned this email and its attachments for malicious content. > > However, the recipient should check this email and any attachments for the > presence of viruses. > > ProHealth Care, Inc. accepts no liability for any damage caused by any > virus transmitted by this email. > > ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 00:31:01 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19CoU9-0006qM-00; Tue, 06 May 2003 00:31:01 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E8CD01112F3; Tue, 6 May 2003 00:24:39 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id RAA27019 for linac-eng-list; Mon, 5 May 2003 17:01:08 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA27010 for ; Mon, 5 May 2003 17:01:05 -0500 (CDT) Received: from Mailsweeper2.chhlth.govt.nz (mailsweeper2.chhlth.govt.nz [159.117.18.162]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h45M19mG027622 for ; Tue, 6 May 2003 10:01:09 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper2.chhlth.govt.nz (Content Technologies SMTPRS 4.2.10) with ESMTP id for ; Tue, 6 May 2003 10:03:17 +1200 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Tue, 06 May 2003 10:00:30 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Tue, 06 May 2003 10:00:16 +1200 From: "Dave Pinchin" To: , Subject: RE: R.O. vs. distilled water Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 06 May 2003 10:00:16 +1200 From: "Dave Pinchin" To: , Subject: RE: R.O. vs. distilled water Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, Oh dear, 3 postings already. This is the last for me for a while. As discussed, distilled and RO water have very low ion counts. This includes disolved O2. My suspicion is that the fish didn't think much at all.... Hopefully they were not put in until the airation gizmo had done it's bubbly stuff. :( >>> "Williams, Rod" 2/05/03 23:03:29 >>> A friend put Distilled water in his fish tank and it pulled the color off all the plastic toy weeds and gravel. I wonder what the fish thought. -----Original Message----- From: Domenic Greco [mailto:dgreco@pacbell.net] Sent: Friday, May 02, 2003 12:47 AM To: Kevin Milleson; rod.williams@phci.org Cc: richardkimball3@attbi.com; David.Burgess@cdha.nshealth.ca; linac-eng@plato.aristotle.net Subject: RE: R.O. vs. distilled water Wow! Using tap water breaks all the rules in my mind. Can you explain what Bioslim is and how TAP water keeps it to a minimum? I know one thing tap water does not keep to a minimum and that is algae. I've done my share of scrubbing water tanks and flushing the system because customers inadvertently used tap water. Domenic Greco Accelinear Company Ltd. -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Kevin Milleson Sent: Thursday, May 01, 2003 3:32 PM To: rod.williams@phci.org Cc: richardkimball3@attbi.com; David.Burgess@cdha.nshealth.ca; linac-eng@plato.aristotle.net Subject: Re: R.O. vs. distilled water Dave and all linac techs I maintain all types of water purification equipment here at Methodist Med Ctr. My experience is that all types of purified water(ae: RO,DI,Distilled) is very hostile to all metals except for Stainless steel. What we need to do is to find something that will kept what is called Bioslim to a min. We here at MMCI have 3 Linac where we using tap water of which we changing every 3 to 4 months. We where using DI Tanks until we had to replace a bend mag. on the 2100C. That my two cents Kevin Milleson Imaging Specialist Clincal Engineering Methodist Medical Center >>> Rich Kimball 05/01/03 06:27AM >>> Dave, I would have to strongly advise against the use of reverse osmosis water in a linac and agree with Rod! Distilled water is the only type I would recommend. Rich Kimball Acceletronics Midwest, Inc. On Thursday, May 1, 2003, at 04:47 AM, Williams, Rod wrote: > I am surprised you are using RO water. The stuff is supposed to > be very aggressive. When they install these systems in your home they > use plastic tubing because it eats up the plumbing. This is what I am > told. Sounds like a interesting study. > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > I'm part of a small group starting a detailed water analysis study on > Varian Clinacs. > The study purpose is to ensure copper and other machine losses are now > minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime > content, machine run time vs losses per hour, galvanic conduction and > repair cost vs losses. > Is there anything else from your experiences that you feel we should > include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at > different intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available to > interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > > > This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 01:04:40 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Cp0i-0006tS-00; Tue, 06 May 2003 01:04:40 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 1B0731112F2; Tue, 6 May 2003 00:58:16 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA28109 for linac-eng-list; Mon, 5 May 2003 17:36:00 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail2.adelaideradiotherapycentre.com.au (dibwar.lnk.telstra.net [165.228.3.69]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id RAA28104 for ; Mon, 5 May 2003 17:35:57 -0500 (CDT) Received: from akovendy (AZK [192.1.4.71]) by mail2.adelaideradiotherapycentre.com.au with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2655.55) id HV7B60CV; Tue, 6 May 2003 08:08:52 +0930 Message-ID: <002501c31318$60779b60$470401c0@adelaideradiotherapycentre.com.au> From: "a kovendy" To: "linac engineering list" References: Subject: Re: LCD Monitor in Treatment Room Date: Tue, 6 May 2003 00:39:50 +0930 Organization: ARC MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "a kovendy" To: "linac engineering list" Subject: Re: LCD Monitor in Treatment Room Date: Tue, 6 May 2003 00:39:50 +0930 Organization: ARC X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Hi Greg. ARC has two treatment rooms each equipped with two 18" LCD monitors. One room has been treating for over two years with no signs of image degradation on either screen. The rooms are pretty small (ex-Co60) and now have Siemens linacs stuffed into them (one a dual-mode) so there is a significant level of in-room scattered radiation. Andrew Kovendy Director, Physics, Engineering & IT Services Adelaide Radiotherapy Centre Adelaide, South Australia Tel +618 8223 3022 Fax +618 8232 1243 email akovendy@adelaideradiotherapycentre.com.au ----- Original Message ----- From: "Greg MacKinnon" To: "LinacEng" Sent: Monday, May 05, 2003 11:23 PM Subject: LCD Monitor in Treatment Room > Hi Group; > > I am looking at replacing the in-room CRT monitor with a new LCD display. I > was wondering if any clinics have LCD display inside the treatment rooms? If > they do, where there any problems. Also, how long has the displays been in > the treatment room? I had heard that after 6 to 8 months the displays would > fail. > > Any comments on this would be appreciated. > > Thanks > > > __________________________________________ > Greg MacKinnon, C.E.T. > Linear Accelerator Service Technologist > Cape Breton Cancer Centre > 1482 George Street > Sydney, Nova Scotia, Canada > B1P 1P3 > tel: (902) 567-8076 > fax: (902) 567-8075 > email: mackinnongreg@cbdha.nshealth.ca > 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 02:34:00 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19CqP8-00072h-00; Tue, 06 May 2003 02:33:58 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 79D411112F4; Tue, 6 May 2003 02:27:34 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id TAA29940 for linac-eng-list; Mon, 5 May 2003 19:09:52 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from gondor.dpa.act.gov.au (gondor.dpa.act.gov.au [136.153.2.50]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id TAA29936 for ; Mon, 5 May 2003 19:09:49 -0500 (CDT) Received: (from smap@localhost) by gondor.dpa.act.gov.au (8.11.1/8.11.1) id h4609lo22719 for ; Tue, 6 May 2003 10:09:47 +1000 (EST) Received: from unknown(10.226.2.7) by gondor via smap (V5.5) id xma022517; Tue, 6 May 03 10:09:21 +1000 Received: by cal007.dpa.act.gov.au with Internet Mail Service (5.5.2653.19) id ; Tue, 6 May 2003 10:09:21 +1000 Message-ID: <2FC7DBCD6D6AD611AD7B0090278CABAEE79DB8@cal036.act.gov.au> From: "Caunt, Peter" To: "Linac Eng (E-mail)" Subject: Distilled Water Date: Tue, 6 May 2003 10:09:16 +1000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Caunt, Peter" To: "Linac Eng (E-mail)" Subject: Distilled Water Date: Tue, 6 May 2003 10:09:16 +1000 Sender: owner-linac-eng@plato.aristotle.net Listmembers, As there appears to be a bit of angst throughout the Linac community over the issue of internal circulating water, I thought it timely to offer more anecdotal evidence. Initially, I would have to question the loss of major subsystems through water leaks in relatively new machines as anything but a manufacturing/assembly issue. If any added manufacturer filtration device is causing this problem then it could be delt with under standard manufacturer product liability. Has anyone had a failed subsystem asessed by an independent testing facility to determine the most probable cause of failure ? Having dealings with a 17 year old Varian LE machine and two Varian HE machines s/no's : 1x & 14xx, I have been surprised by both international experience and comments by Varian staff who have expressed concerns about suitability of filtration components. Although, as yet not having experienced such problems (possible good luck) a conservative approach has been in place for some years. Firstly, single distilled water (we have our own still) is used and changed at least every six months. Secondly, water contamination is minimised and regularly monitored. The still to machine process uses only clean containers, is gravity fed through disposable tubing and all drained water is run through a cotton cloth so as to detect contaminants. Thirdly, the Varian water level hydrometers are used to keep fingers (physicists/therapists) out of the water reservoir. And finally, inserted in the standard in-line filter configuration is a clear laboratory grade water filter housing using a Varian filter insert and differential pressure meter. The filter is changed around three months. Until more objective evidence appears justifying the benefits of the chemical additives, I see little reason to change from the established water procedure, though I am following the thread of conversation with great interest. Building upon the knowledge database. Regards, Peter Caunt Canberra, Australia. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 13:05:38 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D0GQ-0002kN-00; Tue, 06 May 2003 13:05:38 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id CA10D1112F1; Tue, 6 May 2003 12:59:11 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id FAA07224 for linac-eng-list; Tue, 6 May 2003 05:40:49 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail5.nhs.uk (mail5.nhs.uk [194.72.23.242]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id FAA07220 for ; Tue, 6 May 2003 05:40:47 -0500 (CDT) From: David.Smith@arh.grampian.scot.nhs.uk Received: from hn-ext by mail5.nhs.uk (Sendmail 8.8.8) with esmtp id 19Czrn-000665-00; Tue, 06 May 2003 11:40:11 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E60771200A69AD2 for linac-eng@plato.aristotle.net; Tue, 6 May 2003 11:40:11 +0100 Received: from mta.grampian.scot.nhs.uk (195.106.102.11) by relay.nhs.uk (Syntegra-1 7.0.008) id 3EB1E649000FE2A3; Tue, 6 May 2003 11:40:11 +0100 Received: from arh_mail.grampian.scot.nhs.uk (actually host arh.grampian.scot.nhs.uk) by mta.grampian.scot.nhs.uk with SMTP (Mailer) with ESMTP; Tue, 6 May 2003 11:34:45 +0100 Received: by arh.grampian.scot.nhs.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 6 May 2003 11:38:03 +0100 Message-ID: <5FB97D7B340FD2118A6100A0C9A9A1F505D07D7B@arh.grampian.scot.nhs.uk> To: mackinnongreg@cbdha.nshealth.ca Cc: linac-eng@plato.aristotle.net Subject: RE: LCD Monitor in Treatment Room Date: Tue, 6 May 2003 11:37:57 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: David.Smith@arh.grampian.scot.nhs.uk To: mackinnongreg@cbdha.nshealth.ca Cc: linac-eng@plato.aristotle.net Subject: RE: LCD Monitor in Treatment Room Date: Tue, 6 May 2003 11:37:57 +0100 Sender: owner-linac-eng@plato.aristotle.net Greg, I asked a similar question several weeks ago, someone replied that LCD screens are ok, today someone commented that Plasma screens can interfere with PI's. We have recently installed ceiling mounted projectors, so far 4 months and no problems. This may be an alternative to LCD screens. Dave > -----Original Message----- > From: Greg MacKinnon [SMTP:mackinnongreg@cbdha.nshealth.ca] > Sent: Monday, May 05, 2003 2:53 PM > To: LinacEng > Subject: LCD Monitor in Treatment Room > > Greg, > > I asked a similar question several weeks ago, someone replied that LCD > screens are ok, today someone commented that Plasma screens can interfere > with PI's. > We have recently installed ceiling mounted projectors, so far 4 months and > no problems. This may be an alternative to LCD screens. > Hi Group; > > I am looking at replacing the in-room CRT monitor with a new LCD display. > I > was wondering if any clinics have LCD display inside the treatment rooms? > If > they do, where there any problems. Also, how long has the displays been in > the treatment room? I had heard that after 6 to 8 months the displays > would > fail. > > Any comments on this would be appreciated. > > Thanks > > > __________________________________________ > Greg MacKinnon, C.E.T. > Linear Accelerator Service Technologist > Cape Breton Cancer Centre > 1482 George Street > Sydney, Nova Scotia, Canada > B1P 1P3 > tel: (902) 567-8076 > fax: (902) 567-8075 > email: mackinnongreg@cbdha.nshealth.ca > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 15:00:04 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D23A-0004O5-00; Tue, 06 May 2003 15:00:04 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 3B4891112F2; Tue, 6 May 2003 14:53:37 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA08717 for linac-eng-list; Tue, 6 May 2003 07:28:34 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-m08.mx.aol.com (imo-m08.mx.aol.com [64.12.136.163]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA08713 for ; Tue, 6 May 2003 07:28:33 -0500 (CDT) From: RSAINC1@aol.com Received: from RSAINC1@aol.com by imo-m08.mx.aol.com (mail_out_v34.22.) id y.1ea.8269ed3 (17079) for ; Tue, 6 May 2003 08:27:59 -0400 (EDT) Message-ID: <1ea.8269ed3.2be9044e@aol.com> Date: Tue, 6 May 2003 08:27:58 EDT Subject: Siemens Problem Help? RESULT!!!! To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_1ea.8269ed3.2be9044e_boundary" X-Mailer: 8.0 for Windows sub 910 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: RSAINC1@aol.com Date: Tue, 6 May 2003 08:27:58 EDT Subject: Siemens Problem Help? RESULT!!!! To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_1ea.8269ed3.2be9044e_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Thanks to everyone who responded to MD-2 check 2 failures....! Controller 2 was rechipped and or replaced. Problem solved. R.Wood 888.849.2775 --part1_1ea.8269ed3.2be9044e_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Thanks to everyone who responded to MD-2 check 2 failu= res....!
Controller 2 was rechipped and or replaced. Problem solved.
R.Wood
888.849.2775 --part1_1ea.8269ed3.2be9044e_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 16:05:37 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D34b-0005LX-00; Tue, 06 May 2003 16:05:37 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 67F921112F1; Tue, 6 May 2003 15:59:08 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA09655 for linac-eng-list; Tue, 6 May 2003 08:27:36 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail3.nhs.uk (mail3.nhs.uk [194.72.23.240]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA09651 for ; Tue, 6 May 2003 08:27:33 -0500 (CDT) Received: from hn-ext by mail3.nhs.uk (Sendmail 8.8.8) with esmtp id 19D2Th-0007ZD-00; Tue, 06 May 2003 14:27:29 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B600B307B1 for linac-eng@plato.aristotle.net; Tue, 6 May 2003 14:27:29 +0100 Received: from smtp.leedsth.nhs.uk (163.160.107.2) by relay.nhs.uk (Syntegra-1 7.0.008) (authenticated as smtp_leedsth_nhs_uk@es2002.nhs.uk) id 3EB1E6490011822F for linac-eng@plato.aristotle.net; Tue, 6 May 2003 14:27:29 +0100 Received: from LTH-MTA by smtp.leedsth.nhs.uk with Novell_GroupWise; Tue, 06 May 2003 14:28:16 +0100 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Tue, 06 May 2003 14:27:56 +0100 From: "Chris Forrest" To: Subject: Varian water quality related failures Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA09652 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 06 May 2003 14:27:56 +0100 From: "Chris Forrest" To: Subject: Varian water quality related failures Content-Disposition: inline X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA09652 Sender: owner-linac-eng@plato.aristotle.net Sorry to prolong the agony of the water discussion but.. As linac engineer with many years experience of Elekta and Varian LE linacs, I read with interest the apparent stringent water requirements of the Varian HE equipment. I'm keen to know exactly what fails and why it fails - anybody care to explain the specifics? Other than the odd flexi pipe, we have never experienced problems with our 1989 600Cs (we use single distilled and replace every 6 months) although I would imagine the HE, with it's beam bending system, is no comparison. Our Elekta/Philips linacs employ Benzotriazole dissolved in the water which is, I believe, a corrosion inhibitor specifically for copper based components and some other metals. For this reason perhaps we have not experienced any "copper erosion" problems with the Elekta linacs either. (Has anybody tested the use of benzo in Varian HE??) Thanks in advance. Chris Chris Forrest Technical Specialist Radiotherapy Technology Services Department of Medical Physics & Engineering Leeds Teaching Hospitals NHS Trust Cookridge Hospital Hospital Lane Leeds LS16 6QB UK Tel. +44 113 3924354 Fax. +44 113 3924122 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 17:39:42 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D4Xe-0006HE-00; Tue, 06 May 2003 17:39:42 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id D30E61112F1; Tue, 6 May 2003 17:33:15 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA11916 for linac-eng-list; Tue, 6 May 2003 10:04:57 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from ismssclu1.umcaz.edu (smtp.umcaz.edu [198.60.159.10]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA11912 for ; Tue, 6 May 2003 10:04:56 -0500 (CDT) Received: from xchange.umcaz.edu ([170.87.50.25]) by ismssclu1 with InterScan Messaging Security Suite; Tue, 06 May 2003 08:02:41 -0700 Received: by xchange.umcaz.edu with Internet Mail Service (5.5.2653.19) id ; Tue, 6 May 2003 08:02:41 -0700 Message-ID: From: "Watters, Dan" To: "'linac-eng@plato.aristotle.net'" Subject: MD-2 and IMPAC Date: Tue, 6 May 2003 08:02:39 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="ISO-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Watters, Dan" To: "'linac-eng@plato.aristotle.net'" Subject: MD-2 and IMPAC Date: Tue, 6 May 2003 08:02:39 -0700 Sender: owner-linac-eng@plato.aristotle.net We are having a very intermittent problem with IMPAC and communication with our Siemens MD-2. We get an error on IMPAC that says "Error attempting to read setup from accelerator". We have had days when this error did not occur and other days when we have had it pop up 7 to 8 times in a day. There have been times when it shows up on the same patient for a couple of days then it is fine the next day. We have re-downloaded the patient data from Theraplan and this worked on one occasion but not on another patient. I have checked all cabling between systems and IMPAC has been very responsive with looking at their side of the system. We upgraded the NT software to Service Pack 6 on the Sequencer and this did not help. We will continue to work on the IMPAC side of this with the thought that it could also be a linac problem. This is one of those problems that is more difficult because we need to determine if it is a linac problem or an IMPAC problem. I am wondering if anyone else out there has seen this. On a side note I would like to make a comment about Siemens. They have always been very responsive on this list and for that I am very grateful. What I don't appreciate is being told by dispatch that I cannot talk to tech support because we do not have a contract. I had given them a P.O. number when I placed the service call and even with that I could not talk to tech support. I realize that as an in-house engineer Siemens would prefer that I went away and the hospital bought contracts. But this policy of trying to force the customer into buying contracts is, in my opinion only, bad business practice. As I told the dispatcher, this policy doesn't force the hospital to buy contracts, it forces the hospital to buy Varian or Elekta the next time they need a linac. I did get to speak with a service engineer out of our local area but he had to call tech support himself and then try and relay information to me. Not very efficient. Our local service engineer is out of town at school learning yet another modality to add to his already long list of responsibilities. That is, of course, up to Siemens management and only a concern of mine because he is already so busy if I needed service I probably couldn't get him into our hospital for a week. I will get down off my soapbox now. Dan Watters Universtiy Medical Center Tucson, AZ. CONFIDENTIALITY NOTICE: This message and any included attachments are from University Medical Center Corporation and are intended only for the addressee. The information contained in this message is confidential and may constitute inside or non-public information under international, federal, or state laws and is intended only for the use of the addressee. Unauthorized forwarding, copying, printing, distributing, or using such information is strictly prohibited and may be unlawful. If you are not the addressee, please promptly delete this message and notify the sender of the delivery error by e-mail or you may call University Medical Center in Tucson, Arizona, USA at (520) 694-6417. 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 18:18:36 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D59I-0006P3-00; Tue, 06 May 2003 18:18:36 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A1DDB1112F1; Tue, 6 May 2003 18:12:10 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA12524 for linac-eng-list; Tue, 6 May 2003 10:36:19 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mailhost.chi1.ameritech.net (mailhost1-chcgil.chcgil.ameritech.net [206.141.192.67]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA12516 for ; Tue, 6 May 2003 10:36:12 -0500 (CDT) Received: from SeanFrigo ([64.108.146.17]) by mailhost.chi1.ameritech.net (InterMail vM.4.01.02.17 201-229-119) with SMTP id <20030506153613.DPML11905.mailhost.chi1.ameritech.net@SeanFrigo> for ; Tue, 6 May 2003 10:36:13 -0500 Message-ID: <008e01c313e5$3041c100$9601a8c0@SeanFrigo> From: "Sean Frigo" To: "List LinacEng" Subject: Varian MLC controller power on overnight or not? Date: Tue, 6 May 2003 10:35:57 -0500 Organization: Southern WI Radiotherapy Ctr. MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Sean Frigo" To: "List LinacEng" Subject: Varian MLC controller power on overnight or not? Date: Tue, 6 May 2003 10:35:57 -0500 Organization: Southern WI Radiotherapy Ctr. X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Listers, We have received some conflicting advice from our Varian installer and training rep on whether the Millenium 120 MLC controller should be left powered up at night. The argument for turning it off is that it reduces wear on leaf motors. I'd be interested to know what is done by others and why. Thanks in advance. Sean 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 18:19:50 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D5AU-0006PH-00; Tue, 06 May 2003 18:19:50 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 677131112F1; Tue, 6 May 2003 18:13:17 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA12846 for linac-eng-list; Tue, 6 May 2003 10:50:27 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICO2.Partners.org (phsexchico2.partners.org [170.223.254.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA12842 for ; Tue, 6 May 2003 10:50:26 -0500 (CDT) Received: by phsexchico2.partners.org with Internet Mail Service (5.5.2655.55) id <2JPQ6KBC>; Tue, 6 May 2003 11:49:55 -0400 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F19E@phsexch6.partners.org> From: "Maddox, Buford J" To: "'RSAINC1@aol.com'" , linac-eng@plato.aristotle.net Subject: RE: Siemens Problem Help? RESULT!!!! Date: Tue, 6 May 2003 11:49:53 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C313E6.E0B0B02C" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'RSAINC1@aol.com'" , linac-eng@plato.aristotle.net Subject: RE: Siemens Problem Help? RESULT!!!! Date: Tue, 6 May 2003 11:49:53 -0400 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C313E6.E0B0B02C Content-Type: text/plain; charset="iso-8859-1" It is a big help when people post the solution to a problem. Even better, posting the history and how you solved it, including red herrings, educates us all. Jerry -----Original Message----- From: RSAINC1@aol.com [mailto:RSAINC1@aol.com] Sent: Tuesday, May 06, 2003 8:28 AM To: linac-eng@plato.aristotle.net Subject: Siemens Problem Help? RESULT!!!! Thanks to everyone who responded to MD-2 check 2 failures....! Controller 2 was rechipped and or replaced. Problem solved. R.Wood 888.849.2775 ------_=_NextPart_001_01C313E6.E0B0B02C Content-Type: text/html; charset="iso-8859-1"

It is a big help when people post the solution to a problem. Even better, posting the history and how you solved it, including red herrings, educates us all.

Jerry

-----Original Message-----
From: RSAINC1@aol.com [mailto:RSAINC1@aol.com]
Sent: Tuesday, May 06, 2003 8:28 AM
To: linac-eng@plato.aristotle.net
Subject: Siemens Problem Help? RESULT!!!!

Thanks to everyone who responded to MD-2 check 2 failures....!
Controller 2 was rechipped and or replaced. Problem solved.
R.Wood
888.849.2775

------_=_NextPart_001_01C313E6.E0B0B02C-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 18:25:54 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D5GM-0006QS-00; Tue, 06 May 2003 18:25:54 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 06F9C1112F1; Tue, 6 May 2003 18:19:28 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id KAA12729 for linac-eng-list; Tue, 6 May 2003 10:45:21 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICO2.Partners.org (phsexchico2.partners.org [170.223.254.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA12724 for ; Tue, 6 May 2003 10:45:19 -0500 (CDT) Received: by phsexchico2.partners.org with Internet Mail Service (5.5.2655.55) id <2JPQ6J6F>; Tue, 6 May 2003 11:44:47 -0400 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F19C@phsexch6.partners.org> From: "Maddox, Buford J" To: "'Dave Pinchin'" , rod.williams@phci.org, linac-eng@plato.aristotle.net Subject: RE: Elaborate water study Date: Tue, 6 May 2003 11:44:46 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'Dave Pinchin'" , rod.williams@phci.org, linac-eng@plato.aristotle.net Subject: RE: Elaborate water study Date: Tue, 6 May 2003 11:44:46 -0400 Sender: owner-linac-eng@plato.aristotle.net My experience is that if you cycle the machine temperature, let it cool down for a long time then warm it back up to the normal temperature, you will find your gas, water, and vacuum leaks. Marginal joints will be tested. Although this is unavoidable, I would minimize the number of times it is done. Similarly, a leaking temperature control valve which always allows some cold water through the chiller will cause the temp to drop quite a bit, especially if the machine is completely off, and tends to expose problems with joints. AFC and BMAG interlocks also will not work until it warms up. I agree, leave it on. I suspect the first author was being humorous, anyway. Jerry -----Original Message----- From: Dave Pinchin [mailto:Dave.Pinchin@cdhb.govt.nz] Sent: Monday, May 05, 2003 5:36 PM To: rod.williams@phci.org; linac-eng@plato.aristotle.net Subject: RE: Elaborate water study G'day, This one's not getting my vote. The whole system would lose temperature stability and cause heating / cooling leaks all round. Including the vacuum system. I'd ratyher have to replace the BMAG every 10 yrs. :( >>> "Williams, Rod" 2/05/03 23:06:58 >>> How about a timer on the pump. It would shut it down at night and turn on early enough to warm the water up in the AM. ???? It would certainly find all those weak pumps out there. -----Original Message----- From: Dave Pinchin [mailto:Dave.Pinchin@cdhb.govt.nz] Sent: Thursday, May 01, 2003 3:35 PM To: David.Smith@arh.grampian.scot.nhs.uk; linac-eng@plato.aristotle.net Subject: RE: Elaborate water study G'day, Here's an interesting point. The water rushes round dragging in stray ions of copper. It is no longer pure. It no longer drags in stray ions of copper. The problem arises when regular water changes are REQUIRED. Our site had trouble with BMAG interlock. We were able to keep the machine under control by replacing the water every 6 months. We have had 2 BMAG leaks and a kly sol leak. PS. the BMAG problem has been resolved and we now run the goop protocol. :D >>> 2/05/03 00:43:48 >>> We used RO water with no additives on an Elekta SL75 and an ABB CH20 for 23 combined machine years with no problems. The secret was to only ever top up to account for evaporation therefore limiting the waters ability to leach copper. We never did routine complete water changes. > -----Original Message----- > From: Williams, Rod [SMTP:rod.williams@phci.org] > Sent: Thursday, May 01, 2003 10:48 AM > To: 'David Burgess'; linac-eng@plato.aristotle.net > Subject: RE: Elaborate water study > > I am surprised you are using RO water. The stuff is supposed to be very > aggressive. When they install these systems in your home they use plastic > tubing because it eats up the plumbing. This is what I am told. Sounds > like a interesting study. > > > > -----Original Message----- > From: David Burgess [mailto:David.Burgess@cdha.nshealth.ca] > Sent: Wednesday, April 30, 2003 10:59 AM > To: linac-eng@plato.aristotle.net > Subject: Elaborate water study > > > I'm part of a small group starting a detailed water analysis study > on Varian Clinacs. > The study purpose is to ensure copper and other machine losses are > now minimized. > The study might include a water chemical analysis, hose > deteriation/longevity, sacrificial electrodes, biological slime content, > machine run time vs losses per hour, galvanic conduction and repair cost > vs losses. > Is there anything else from your experiences that you feel we > should include ? > I hope other clinics might be interested in contributing any info or > analysis data they have. > In Eastern Canada a new machine will soon start up with the water > additive. Other machines here are using RO water and flushing at different > intervals. There is a mix of LEs and HEs. > We also have a 8 year old 2100C with new guide sled and new Bending > magnet. > The study duration will be 3 years, with interim reports available > to interested parties. The final report will probably be presented as a > paper to some physics/service gathering. > David Burgess > Nova Scotia Cancer Centre > Halifax, Canada > > This email message may contain confidential information and is intended > only for the individual named. If you are not the named addressee you > should not disseminate, distribute or copy this email. Please notify the > sender immediately by email if you have received this email by mistake and > delete this email from your system. 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Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 19:20:07 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D66p-0006aL-00; Tue, 06 May 2003 19:20:07 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 3FD131112F1; Tue, 6 May 2003 19:13:31 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id LAA14673 for linac-eng-list; Tue, 6 May 2003 11:46:35 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mopsy.musc.edu (mopsy.musc.edu [128.23.203.176]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id LAA14669 for ; Tue, 6 May 2003 11:46:33 -0500 (CDT) Received: from revere3.musc.edu (revere3.musc.edu [128.23.203.10]) by mopsy.musc.edu (8.12.9/8.12.9) with ESMTP id h46GjsP4005028 for ; Tue, 6 May 2003 12:45:54 -0400 Received: from XCHANGE2k.radonc2k.musc.edu (xchange2k.RadOnc.MUSC.EDU [128.23.55.250]) by revere3.musc.edu (8.12.9/8.12.9) with ESMTP id h46Gjrc8032166 for ; Tue, 6 May 2003 12:45:53 -0400 (EDT) Content-Class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Subject: RE: Varian MLC controller power on overnight or not? X-MimeOLE: Produced By Microsoft Exchange V6.0.6249.0 Date: Tue, 6 May 2003 12:45:53 -0400 Message-ID: Thread-Topic: Varian MLC controller power on overnight or not? Thread-Index: AcMT6LlMqXNovZUrQMm263AukVHtGgABQBrA From: "Nelson, Steve" To: "Sean Frigo" , "List LinacEng" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id LAA14670 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Content-Class: urn:content-classes:message Subject: RE: Varian MLC controller power on overnight or not? X-MimeOLE: Produced By Microsoft Exchange V6.0.6249.0 Date: Tue, 6 May 2003 12:45:53 -0400 Thread-Topic: Varian MLC controller power on overnight or not? Thread-Index: AcMT6LlMqXNovZUrQMm263AukVHtGgABQBrA From: "Nelson, Steve" To: "Sean Frigo" , "List LinacEng" X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id LAA14670 Sender: owner-linac-eng@plato.aristotle.net Hello Sean and list, At MLC school we were told to power off to the controller in the evening to keep motors from being worn out from possible "dithering" of motors for those extended periods. There was some controversy as to weather the mlc should be parked or left at different field shapes overnight to keep from dimpling the secondary feedback boards. Supposedly, the Millennium series secondary feedback boards are not prone to dimple at the parked position, so we turn the controller off at night either parked or with the last shape in place. Regards, Stephen Stephen J. Nelson, MSEE Instructor Dept. of Radiation Oncology Medical University of S.C. 171 Ashley Ave. Charleston, S.C. 29425 843-792-3271 -----Original Message----- From: Sean Frigo [mailto:sfrigo@smrif.com] Sent: Tuesday, May 06, 2003 11:36 AM To: List LinacEng Subject: Varian MLC controller power on overnight or not? Listers, We have received some conflicting advice from our Varian installer and training rep on whether the Millenium 120 MLC controller should be left powered up at night. The argument for turning it off is that it reduces wear on leaf motors. I'd be interested to know what is done by others and why. Thanks in advance. Sean 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 19:53:34 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D6dC-0006cU-00; Tue, 06 May 2003 19:53:34 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 032701112F2 for ; Tue, 6 May 2003 19:47:09 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVL02Z9GNK8XG9IJ@med.uu.nl> for kok@radth.med.uu.nl; Tue, 6 May 2003 19:44:14 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVL02WK5YA8X2JJL@med.uu.nl> for kok@radth.med.uu.nl; Tue, 06 May 2003 19:44:11 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA12524 for linac-eng-list; Tue, 06 May 2003 10:36:19 -0500 (CDT) Received: from mailhost.chi1.ameritech.net (mailhost1-chcgil.chcgil.ameritech.net [206.141.192.67]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA12516 for ; Tue, 06 May 2003 10:36:12 -0500 (CDT) Received: from SeanFrigo ([64.108.146.17]) by mailhost.chi1.ameritech.net (InterMail vM.4.01.02.17 201-229-119) with SMTP id <20030506153613.DPML11905.mailhost.chi1.ameritech.net@SeanFrigo> for ; Tue, 06 May 2003 10:36:13 -0500 Date: Tue, 06 May 2003 10:35:57 -0500 From: Sean Frigo Subject: Varian MLC controller power on overnight or not? Sender: owner-linac-eng@plato.aristotle.net To: List LinacEng Message-id: <008e01c313e5$3041c100$9601a8c0@SeanFrigo> Organization: Southern WI Radiotherapy Ctr. MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Mailer: Microsoft Outlook Express 6.00.2800.1106 Content-type: text/plain; charset="iso-8859-1" Content-transfer-encoding: 7bit X-Priority: 3 X-MSMail-priority: Normal Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Tue, 06 May 2003 10:35:57 -0500 From: Sean Frigo Subject: Varian MLC controller power on overnight or not? Sender: owner-linac-eng@plato.aristotle.net To: List LinacEng Organization: Southern WI Radiotherapy Ctr. X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Priority: 3 X-MSMail-priority: Normal X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Listers, We have received some conflicting advice from our Varian installer and training rep on whether the Millenium 120 MLC controller should be left powered up at night. The argument for turning it off is that it reduces wear on leaf motors. I'd be interested to know what is done by others and why. Thanks in advance. Sean 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 20:05:28 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19D6oi-0006dH-00; Tue, 06 May 2003 20:05:28 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 547801112F1; Tue, 6 May 2003 19:58:59 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA16034 for linac-eng-list; Tue, 6 May 2003 12:34:24 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from persephone.med.yale.edu (email.med.yale.edu [130.132.232.16]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA16030 for ; Tue, 6 May 2003 12:34:23 -0500 (CDT) Received: from yale.edu (vitalip.med.yale.edu [130.132.213.170]) by email.med.yale.edu (PMDF V6.1-1 #40995) with ESMTP id <0HEH0SHJC7H9W0@email.med.yale.edu> for linac-eng@plato.aristotle.net; Tue, 06 May 2003 13:34:22 -0400 (EDT) Date: Tue, 06 May 2003 13:34:28 -0400 From: "Peter E. Vitali" Subject: Re: Varian MLC controller power on overnight or not? To: Sean Frigo Cc: List LinacEng Message-id: <3EB7F21C.AC90B498@yale.edu> MIME-version: 1.0 X-Mailer: Mozilla 4.76 (Macintosh; U; PPC) Content-type: text/plain; x-mac-creator=4D4F5353; x-mac-type=54455854; charset=us-ascii Content-transfer-encoding: 7bit X-Accept-Language: en,pdf References: <008e01c313e5$3041c100$9601a8c0@SeanFrigo> Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 06 May 2003 13:34:28 -0400 From: "Peter E. Vitali" Subject: Re: Varian MLC controller power on overnight or not? To: Sean Frigo Cc: List LinacEng X-Accept-Language: en,pdf Sender: owner-linac-eng@plato.aristotle.net Sean: We shut down the controllers every evening. We do it so that the Leaf motors don't hunt all night. We have two machines with Millennium 120 Leaf MLC. We had initial problems with motors on both our mlc's in their first 3 months of use but after that they have become very stable. Our first mlc has been in use now about 2 years. We have been doing IMRT Step and Shoot on this MLC for about 6 months now and have seen very few motor problems. The new machine's MLC is coming on line for IMRT soon but since the machine was installed in August of 2002 we have had few motor problems. Looks like I just jinxed myself. Peter E. Vitali, CBET Therapeutic Radiological Engineer Yale New Haven Hospital 20 York Street, HRT 22 New Haven, CT. 06504 Phone: (203) 688-2948 FAX: (203) 688-3663 E-mail: peter.vitali@yale.edu As usual, everything I say may be plausibly denied at my employer's convenience... 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 23:39:49 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DAA9-0006vD-00; Tue, 06 May 2003 23:39:49 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id F1AF51112F2; Tue, 6 May 2003 23:33:21 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id QAA20615 for linac-eng-list; Tue, 6 May 2003 16:00:47 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA20611 for ; Tue, 6 May 2003 16:00:44 -0500 (CDT) Received: from Mailsweeper2.chhlth.govt.nz (mailsweeper2.chhlth.govt.nz [159.117.18.162]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h46L0gmG019400 for ; Wed, 7 May 2003 09:00:43 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper2.chhlth.govt.nz (Content Technologies SMTPRS 4.2.10) with ESMTP id for ; Wed, 7 May 2003 09:02:44 +1200 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Wed, 07 May 2003 09:00:01 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Wed, 07 May 2003 08:59:55 +1200 From: "Dave Pinchin" To: , Subject: Re: Varian water quality related failures Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 07 May 2003 08:59:55 +1200 From: "Dave Pinchin" To: , Subject: Re: Varian water quality related failures Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day Chris, It's a balancing act really. There are several factors to be considered. 1/ The electrical issues of fine measurement of current in the BMAG coil which happens to be Cu water pipes, this is complicated somewhat by any conduction to the main body of the machine (via the water). 2/ The requirement for growth free water, algae etc tends to block small pipes and (more importantly) puts the engineer off his lunch. 3/ Also the more chemistry in the water the more it is likely to breakdown in the super high radiation area of the target. 4/ The purer the water, the more it will try to tear ions out of stuff. 5/ To increase cooling, the water galleries in things like the target should be nearer the heat source. (this results in fine tolerance engineering - and less metal to be eaten away by the water). Our site had a BMAG power supply which was unstable at low I. This was not at all apparent. We were able to keep the machine servicable by keeping the water purity up. This meant replacing the old, grey demineraliser cartridge 2x or 3x as often as V recomended. Our (water related) failure history on 2100 #40 has 1 x target leak. 1 x klystron focus coil leak, 2 x 3% slit leaks (outside the guide). On our (here's some real history for you) Varian 7705 Clinac we lost a waveguide focus coil cooling pipe @ age 20. I suspect the way the 1800s etc worked was that the grey cartridge would saturate in 1-2 months allowing the water to lose it's cutting edge. Then the dreaded 'Culligan' which was like the old grey but much bigger, There was also a water conductivity indicator which told you when to replace your cartridge. The current recomendation is for two chemicals to be added. The MSDS shows that there is a anti growth agent - Gluteraldehyde (20ml into 80 litre It's VERY diluted) and an anticorosive - Sodium Tolyltriazole, Sodium Metaborate Tetrahydride and Sodium Molybdate Dihydrate. My particular feeling is that the new reationale of chemistry is sensible and good. I think they've got a long term answer for a very slow problem. Dave. >>> "Chris Forrest" 7/05/03 01:27:56 >>> Sorry to prolong the agony of the water discussion but.. As linac engineer with many years experience of Elekta and Varian LE linacs, I read with interest the apparent stringent water requirements of the Varian HE equipment. I'm keen to know exactly what fails and why it fails - anybody care to explain the specifics? Other than the odd flexi pipe, we have never experienced problems with our 1989 600Cs (we use single distilled and replace every 6 months) although I would imagine the HE, with it's beam bending system, is no comparison. Our Elekta/Philips linacs employ Benzotriazole dissolved in the water which is, I believe, a corrosion inhibitor specifically for copper based components and some other metals. For this reason perhaps we have not experienced any "copper erosion" problems with the Elekta linacs either. (Has anybody tested the use of benzo in Varian HE??) Thanks in advance. Chris Chris Forrest Technical Specialist Radiotherapy Technology Services Department of Medical Physics & Engineering Leeds Teaching Hospitals NHS Trust Cookridge Hospital Hospital Lane Leeds LS16 6QB UK Tel. +44 113 3924354 Fax. +44 113 3924122 ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 06 23:48:57 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DAIz-0006vY-00; Tue, 06 May 2003 23:48:57 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 51EF11112F2; Tue, 6 May 2003 23:42:30 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id QAA21096 for linac-eng-list; Tue, 6 May 2003 16:21:36 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from titan.lhsc.on.ca (titan.lhsc.on.ca [142.158.2.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA21089 for ; Tue, 6 May 2003 16:21:34 -0500 (CDT) From: Randy.McVittie@lrcc.on.ca Received: from mail.lrcc.on.ca (mail.lrcc.on.ca [142.158.120.242]) by titan.lhsc.on.ca (8.11.6+Sun/8.11.6) with SMTP id h46LL3S22983 for ; Tue, 6 May 2003 17:21:03 -0400 (EDT) Received: by mail.lrcc.on.ca(Lotus SMTP MTA v4.6.7 (934.1 12-30-1999)) id 85256D1E.007545F1 ; Tue, 6 May 2003 17:20:56 -0400 X-Lotus-FromDomain: LRCC To: List LinacEng Message-ID: <85256D1E.007544C9.00@mail.lrcc.on.ca> Date: Tue, 6 May 2003 17:20:52 -0400 Subject: Re: Varian MLC controller power on overnight or not? Mime-Version: 1.0 Content-type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Randy.McVittie@lrcc.on.ca X-Lotus-FromDomain: LRCC To: List LinacEng Date: Tue, 6 May 2003 17:20:52 -0400 Subject: Re: Varian MLC controller power on overnight or not? Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net We switch our MMLC off overnight, we also switch our Mark 2's off at night too. Randy 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 07 12:25:46 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DM7O-0002zr-00; Wed, 07 May 2003 12:25:46 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A555A1105E7; Wed, 7 May 2003 12:19:16 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id EAA02707 for linac-eng-list; Wed, 7 May 2003 04:58:15 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from intfw1.phci.org (user.phci.org [207.67.109.70]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id EAA02703 for ; Wed, 7 May 2003 04:58:14 -0500 (CDT) Received: from intfw1.phci.org (root@localhost) by intfw1.phci.org with ESMTP id h479vcpV020580 for ; Wed, 7 May 2003 04:57:38 -0500 (CDT) Received: from zixvpm00.phci.org (zixvpm02.phci.org [172.20.3.22]) by intfw1.phci.org with ESMTP id h479vcRt020577 for ; Wed, 7 May 2003 04:57:38 -0500 (CDT) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by Outbound.phci.org (Proprietary) with ESMTP id 5FD221C006A for ; Wed, 7 May 2003 04:57:38 -0500 (CDT) Received: from rwdmail.phci.org (smtpscan.phci.org [172.20.3.10]) by zixvpm00.phci.org (Proprietary) with SMTP id 139251A4078; Wed, 7 May 2003 04:57:38 -0500 (CDT) Received: through eSafe SMTP Relay 1052290831; Wed May 07 04:57:38 2003 Received: by rwdmail.phci.org with Internet Mail Service (5.5.2653.19) id ; Wed, 7 May 2003 05:01:54 -0500 Message-ID: <7A3389A8D723D511B2260008C7B2BF390D60F6@wmhmail.phci.org> From: "Williams, Rod"

Does this apply to Millennium or Mark series? Both have = different=20 control mechanism.

Thanks in advance.

Kim Yeung

------=_NextPart_000_006E_01C314D4.9886CFE0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 07 17:15:52 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DQe8-0007W7-00; Wed, 07 May 2003 17:15:52 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2D87F112D47; Wed, 7 May 2003 17:09:19 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA06428 for linac-eng-list; Wed, 7 May 2003 09:44:35 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id JAA06424 for ; Wed, 7 May 2003 09:44:32 -0500 (CDT) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Wed, 07 May 2003 11:42:53 -0300 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Date: Wed, 07 May 2003 11:42:49 -0300 From: "Scott Purcell" To: , , Subject: RE: Varian MLC controller power on overnight or not? Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id JAA06425 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 07 May 2003 11:42:49 -0300 From: "Scott Purcell" To: , , Subject: RE: Varian MLC controller power on overnight or not? Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id JAA06425 Sender: owner-linac-eng@plato.aristotle.net We have four linac's with MarkII MLC and we turn the power supply off at night to increase the longevity of the optics and the PCB's. We have made a simple modification to the doughnut to allow us to turn of the MLC power supply easily. This has made a big difference. Scott Scott Purcell, C.E.T Linear Accelerator Service Technologist Department of Medical Physics Nova Scotia Cancer Centre 5820 University Avenue Halifax, Nova Scotia Canada Email scott.purcell@cdha.nshealth.ca Phone: 902-473-2563 Fax: 902-473-6120 >>> "Williams, Rod" 05/07/03 06:57AM >>> Awhile back I posted a mod for turning the head power supply off. This has worked out very well. The optics last much longer, and I believe that the replacement of the head and comm boards are reduced. I also have kept the timer on the controller even though the techs shut off the controller after the treatment day. The techs have been taught how to shut off the MLC without leaving it in the parked position, they end up doing this about half the time. This should help with the dimpling of the secondary feedback boards. At least I haven't change one yet. The oldest MLC was put in 5/99 s/n 1008. Have been changing about 4 to 6 motors per year. No leaf nuts yet, and do a monthly PWM and leaf cleaning as needed. Things have been reliable so far. -----Original Message----- From: Sean Frigo [mailto:sfrigo@smrif.com] Sent: Tuesday, May 06, 2003 10:36 AM To: List LinacEng Subject: Varian MLC controller power on overnight or not? Listers, We have received some conflicting advice from our Varian installer and training rep on whether the Millenium 120 MLC controller should be left powered up at night. The argument for turning it off is that it reduces wear on leaf motors. I'd be interested to know what is done by others and why. Thanks in advance. Sean This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 07 18:24:49 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DRir-0007fx-00; Wed, 07 May 2003 18:24:49 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0CEC4112D47; Wed, 7 May 2003 18:18:18 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA07708 for linac-eng-list; Wed, 7 May 2003 10:52:01 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id KAA07704 for ; Wed, 7 May 2003 10:51:59 -0500 (CDT) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Wed, 07 May 2003 12:50:26 -0300 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Date: Wed, 07 May 2003 12:50:13 -0300 From: "Scott Purcell" To: Subject: Water info Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id KAA07705 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 07 May 2003 12:50:13 -0300 From: "Scott Purcell" To: Subject: Water info Content-Disposition: inline X-Guinevere: 1.1.14 ; Nova Scotia Hospital X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id KAA07705 Sender: owner-linac-eng@plato.aristotle.net Hi to all, I just want to say thanks for all the great discussion on distilled water vs RO water and other water related issues. Our water study group will be meeting next week, and I will bring up several of the ideas that were discussed here. As things evolve I will keep the list posted. Cheers Scott Scott Purcell, C.E.T Linear Accelerator Service Technologist Department of Medical Physics Nova Scotia Cancer Centre 5820 University Avenue Halifax, Nova Scotia Canada Email scott.purcell@cdha.nshealth.ca Phone: 902-473-2563 Fax: 902-473-6120 This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 08 05:28:20 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Dc4t-000051-00; Thu, 08 May 2003 05:28:15 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id CC84F112D65; Thu, 8 May 2003 05:21:41 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id VAA20406 for linac-eng-list; Wed, 7 May 2003 21:55:06 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from smtp802.mail.sc5.yahoo.com (smtp802.mail.sc5.yahoo.com [66.163.168.181]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id VAA20402 for ; Wed, 7 May 2003 21:55:04 -0500 (CDT) Received: from adsl-65-69-223-85.dsl.hstntx.swbell.net (HELO 3vhgn01) (linacs@swbell.net@65.69.223.85 with login) by smtp-sbc-v1.mail.vip.sc5.yahoo.com with SMTP; 8 May 2003 02:55:03 -0000 Message-ID: <004001c3150e$5ba6f660$55df4541@3vhgn01> From: "linacs" To: "Linac List" Subject: Siemens maggi follow pot Date: Wed, 7 May 2003 22:03:10 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003D_01C314E4.725B7040" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "linacs" To: "Linac List" Subject: Siemens maggi follow pot Date: Wed, 7 May 2003 22:03:10 -0500 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_003D_01C314E4.725B7040 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello list, Would anyone know a sourse for a Conventional Siemens follow pot for the = magnetron (ie AFC). I have the following information, but cannot find a manufacturer: Helipot FS-RS-L50C R1K Thanks in advance Luis ------=_NextPart_000_003D_01C314E4.725B7040 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hello list,

Would anyone know a sourse for a = Conventional=20 Siemens follow pot for the magnetron (ie AFC).

I have the following information, but = cannot find a=20 manufacturer:

Helipot FS-RS-L50C R1K

Thanks in advance

Luis

------=_NextPart_000_003D_01C314E4.725B7040-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 08 18:21:38 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Do9K-0006RC-00; Thu, 08 May 2003 18:21:38 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id EEFEB111319; Thu, 8 May 2003 18:15:01 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA02658 for linac-eng-list; Thu, 8 May 2003 10:51:14 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from bajor.cancercare.on.ca ([142.76.1.63]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA02648 for ; Thu, 8 May 2003 10:51:06 -0500 (CDT) Received: by bajor.tsrcc.on.ca with Internet Mail Service (5.5.2653.19) id ; Thu, 8 May 2003 11:50:21 -0400 Message-ID: <4631AA4F502ED711AE0700A0C9EBCF2964F578@bajor.tsrcc.on.ca> From: "Rozenblat, Alex" To: "'linacs'" , Linac List Subject: RE: Siemens maggi follow pot Date: Thu, 8 May 2003 11:50:21 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Rozenblat, Alex" To: "'linacs'" , Linac List Subject: RE: Siemens maggi follow pot Date: Thu, 8 May 2003 11:50:21 -0400 Sender: owner-linac-eng@plato.aristotle.net Hi, Luis I don't think you need a very specific pot. As long as it is 1KOhm, 1 turn, same linearity and shaft diameter - use any Brand. Alex Rozenblat -----Original Message----- From: linacs [mailto:linacs@swbell.net] Sent: 07 May 2003 23:03 To: Linac List Subject: Siemens maggi follow pot Hello list, Would anyone know a sourse for a Conventional Siemens follow pot for the magnetron (ie AFC). I have the following information, but cannot find a manufacturer: Helipot FS-RS-L50C R1K Thanks in advance Luis 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 08 19:28:05 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DpBd-0006dl-00; Thu, 08 May 2003 19:28:05 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2D2161105E1; Thu, 8 May 2003 19:21:25 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id LAA04413 for linac-eng-list; Thu, 8 May 2003 11:58:35 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-r03.mx.aol.com (imo-r03.mx.aol.com [152.163.225.99]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id LAA04409 for ; Thu, 8 May 2003 11:58:33 -0500 (CDT) From: GARRYANGEL@aol.com Received: from GARRYANGEL@aol.com by imo-r03.mx.aol.com (mail_out_v34.22.) id m.113.23021d3c (3980); Thu, 8 May 2003 12:57:49 -0400 (EDT) Message-ID: <113.23021d3c.2bebe68d@aol.com> Date: Thu, 8 May 2003 12:57:49 EDT Subject: Re: Varian water quality related failures To: Dave.Pinchin@cdhb.govt.nz, Chris.Forrest@leedsth.nhs.uk, linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_113.23021d3c.2bebe68d_boundary" X-Mailer: 8.0 for Windows sub 6014 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: GARRYANGEL@aol.com Date: Thu, 8 May 2003 12:57:49 EDT Subject: Re: Varian water quality related failures To: Dave.Pinchin@cdhb.govt.nz, Chris.Forrest@leedsth.nhs.uk, linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_113.23021d3c.2bebe68d_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Everyone ... I have been reading the posts regarding the "water quality" issues and the Varian H. E. related failures. As I have been working with these machines over the past 25 years I would like to inject my "two cents" worth. First, is the fact that the Varian L.E. machines do not use any type of filtering or D.I. system. I have not experienced nor have I been aware that there are any issues with the L.E. water aside from an occasional black algae issue. And that issue is easily resolved. That should speak volumes! For the most part of the first 20 years of these machines the only "water related" failures seemed to be the TARGET failures. All the Bend magnet leaks and FOCUS COIL leaks first started appearing after the OEM "upgrade" the water system filtering. That should speak volumes. BTW, the TARGET failures are NOT directly water related. And in fact low resistance water may have saved TARGETS. More on that later. A little bit of history. The water "quality" spec dates back to the use of Klystron in military radar systems. There were no "Filtering" systems or D. I. systems on these Klystron Radar sets. At sea these radar's ran 24/7 for line periods exceeding 40 days. Along comes the H.E. linac which used the original Klystron that was designed and built for the military. Today's tube is just an upgrade from the old Radar tube. So, it appears that the radar tube spec was incorporated. (I worked in the old "Tube division" when this was happening) Not until Klystrons started failing in the early 90's did the water filtering system become an issue. It seems that a design change was made to the Klystron and the Collector was changed from copper to stainless steel. After a while these collectors would begin to leak and cause a vacuum failure in the Klystron. To correct the problem the OEM recommended the replacement of the D.I. cartridge with the "new" system to preserve the water quality. Now, please correct me if I've drawn the wrong conclusions, but doesn't it seem that all these water issues began after this water system "change" took place. My two cents ... The only things you need to be cautious about regarding the water system is leaving mineral deposits on the Klystron Collector (these deposits would interfere with the uniform water cooling of the collector) and anything that could plug the bending magnet cooling lines (saw this only once). By the way, water resistivity cannot cause Bend magnet faults. If you doubt this email me and I'll give you a very valid explanation. I have just been involved with a target change on a H.E. machine and inspected the water hoses in the gantry. They were replaced about six years ago and were in remarkably GOOD condition. The DI had been changed maybe once per year. The only water used was distilled water. Conclusion ... Don't use any water with a mineral content. Don't be too aggressive in replacing the DI cartridges. End of story! I would welcome your comments. Garry --part1_113.23021d3c.2bebe68d_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi Everyone ...

I have been reading the posts regarding the "water quality" issues and the V= arian H. E. related failures. As I have been working with these machines ove= r the past 25 years I would like to inject my "two cents" worth.

First, is the fact that the Varian L.E. machines do not use any type of filt= ering or D.I. system. I have not experienced nor have I been aware that ther= e are any issues with the L.E. water aside from an occasional black algae is= sue. And that issue is easily resolved. That should speak volumes!

For the most part of the first 20 years of these machines the only "water re= lated" failures seemed to be the TARGET failures. All the Bend magnet=20= leaks and FOCUS COIL leaks first started appearing after the OEM "upgrade" t= he water system filtering. That should speak volumes. BTW, the TARGET failur= es are NOT directly water related. And in fact low resistance water m= ay have saved TARGETS. More on that later.

A little bit of history. The water "quality" spec dates back to the use of K= lystron in military radar systems. There were no "Filtering" systems or D. I= . systems on these Klystron Radar sets. At sea these radar's ran 24/7 for li= ne periods exceeding 40 days. Along comes the H.E. linac which used the orig= inal Klystron that was designed and built for the military. Today's tube is=20= just an upgrade from the old Radar tube. So, it appears that the radar tube=20= spec was incorporated. (I worked in the old "Tube division" when this was ha= ppening)

Not until Klystrons started failing in the early 90's did the water filterin= g system become an issue. It seems that a design change was made to the Klys= tron and the Collector was changed from copper to stainless steel. After a w= hile these collectors would begin to leak and cause a vacuum failure in the=20= Klystron. To correct the problem the OEM recommended the replacement of the=20= D.I. cartridge with the "new" system to preserve the water quality. Now, ple= ase correct me if I've drawn the wrong conclusions, but doesn't it seem that= all these water issues began after this water system "change" took place. <= BR>
My two cents ... The only things you need to be cautious about regarding the= water system is leaving mineral deposits on the Klystron Collector (these d= eposits would interfere with the uniform water cooling of the collector) and= anything that could plug the bending magnet cooling lines (saw this only on= ce). By the way, water resistivity cannot cause Bend magnet faults. If you d= oubt this email me and I'll give you a very valid explanation.

I have just been involved with a target change on a H.E. machine and inspect= ed the water hoses in the gantry. They were replaced about six years ago and= were in remarkably GOOD condition. The DI had been changed maybe once per y= ear. The only water used was distilled water.

Conclusion ... Don't use any water with a mineral content. Don't be too aggr= essive in replacing the DI cartridges. End of story!

I would welcome your comments.

Garry --part1_113.23021d3c.2bebe68d_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 08 19:42:41 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DpPl-0006er-00; Thu, 08 May 2003 19:42:41 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 0D1241105E2; Thu, 8 May 2003 19:36:05 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA04775 for linac-eng-list; Thu, 8 May 2003 12:15:08 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-m07.mx.aol.com (imo-m07.mx.aol.com [64.12.136.162]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA04771 for ; Thu, 8 May 2003 12:15:07 -0500 (CDT) From: GARRYANGEL@aol.com Received: from GARRYANGEL@aol.com by imo-m07.mx.aol.com (mail_out_v34.22.) id y.162.20037fc7 (3980) for ; Thu, 8 May 2003 13:14:30 -0400 (EDT) Message-ID: <162.20037fc7.2bebea76@aol.com> Date: Thu, 8 May 2003 13:14:30 EDT Subject: "Elaborate" TARGET FAILURE STUDY To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_162.20037fc7.2bebea76_boundary" X-Mailer: 8.0 for Windows sub 6014 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: GARRYANGEL@aol.com Date: Thu, 8 May 2003 13:14:30 EDT Subject: "Elaborate" TARGET FAILURE STUDY To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_162.20037fc7.2bebea76_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hello Everyone: I believe I have discovered a condition that could lead to target failures in the Varian H.E. systems. As I mentioned in a prior post, it is NOT water related. And there is absolutely nothing you can do to the water system that could prevent these unnecessary TARGET failures. I just need additional information from anyone who has actively participated in a TARGET replacement. or has access to the machine parameters both before and after the Target failure. The morning check log would be excellent. All you need to do is email the recorded parameters for one of the X-ray energies. I await you responses. Thank you in advance. Garry --part1_162.20037fc7.2bebea76_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hello Everyone:

I believe I have discovered a condition that could lead to target failures i= n the Varian H.E. systems. As I mentioned in a prior post, it is NOT water r= elated. And there is absolutely nothing you can do to the water system that=20= could prevent these unnecessary TARGET failures. I just need additional info= rmation from anyone who has actively participated in a TARGET replacement. o= r has access to the machine parameters both before and after the Target fail= ure. The morning check log would be excellent. All you need to do is email&n= bsp; the recorded parameters for one of the X-ray energies. I await yo= u responses. Thank you in advance.

Garry --part1_162.20037fc7.2bebea76_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 08 23:34:31 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Dt27-0006xc-00; Thu, 08 May 2003 23:34:31 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 72018110609; Thu, 8 May 2003 23:27:52 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id QAA11674 for linac-eng-list; Thu, 8 May 2003 16:07:07 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA11670 for ; Thu, 8 May 2003 16:07:03 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h48L724A018491 for ; Fri, 9 May 2003 09:07:03 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Fri, 9 May 2003 09:01:05 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Fri, 09 May 2003 09:06:23 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Fri, 09 May 2003 09:06:06 +1200 From: "Dave Pinchin" To: , Subject: Re: Varian water quality related failures Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id QAA11671 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 09 May 2003 09:06:06 +1200 From: "Dave Pinchin" To: , Subject: Re: Varian water quality related failures Content-Disposition: inline X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id QAA11671 Sender: owner-linac-eng@plato.aristotle.net G'day Garry, That explains an awful lot. I remember the time when klys were dying of sids. The line I heard was that there was no known changes in manufacture. I had wondered why I had never heard of a water leak in a CL18 or an 1800. Wit regard your other comments I would have to disagree and agree with reservations on the following issues. Firstly, BMAG failures. I disagree in that we have had leaks appear in the region of the 3% slits at the join region of pipes to 'galleried copper'. It is my appreciation that these leaks were chemical erosion rather than mechanical. secondly, Water conductivity and BMAG I/L. I agree with reservations. The power supply cct is designed to be floating and therefore the (ground referenced) window comparitor is simply looking for a voltage change. However. conductive water tends to put a ground reference on the coil. This can be balanced out. But as the water conductivity CHANGES the balance point needs to be changed too. By analysing the water conductivity on a daily basis we found that for 2 months after changing the 'grey pipe' the conductivity would be below 1uS/cm. then it would rise exponentially over the next month as the tube got saturated. During this rapid rise we would have continual BMAGs. We would find the balance out of spec and rebalance the I/L (worst case would be 2x per day). As the manufacturers specs demanded we change the tube 6 monthly we had to rebalance at tube change as well. And then 3 months later another lot of probs. Therefore we monitored the conductivity and when it reached 13uS/cm we scheduled the 'tube' to be replaced. No more BMAGs. I'm happy with V's current modus operandii as there is a preset amount of water conduction which can be balanced out. There should be little change in the conduction over the life of the water. :D >>> 9/05/03 04:57:49 >>> Hi Everyone ... I have been reading the posts regarding the "water quality" issues and the Varian H. E. related failures. As I have been working with these machines over the past 25 years I would like to inject my "two cents" worth. First, is the fact that the Varian L.E. machines do not use any type of filtering or D.I. system. I have not experienced nor have I been aware that there are any issues with the L.E. water aside from an occasional black algae issue. And that issue is easily resolved. That should speak volumes! For the most part of the first 20 years of these machines the only "water related" failures seemed to be the TARGET failures. All the Bend magnet leaks and FOCUS COIL leaks first started appearing after the OEM "upgrade" the water system filtering. That should speak volumes. BTW, the TARGET failures are NOT directly water related. And in fact low resistance water may have saved TARGETS. More on that later. A little bit of history. The water "quality" spec dates back to the use of Klystron in military radar systems. There were no "Filtering" systems or D. I. systems on these Klystron Radar sets. At sea these radar's ran 24/7 for line periods exceeding 40 days. Along comes the H.E. linac which used the original Klystron that was designed and built for the military. Today's tube is just an upgrade from the old Radar tube. So, it appears that the radar tube spec was incorporated. (I worked in the old "Tube division" when this was happening) Not until Klystrons started failing in the early 90's did the water filtering system become an issue. It seems that a design change was made to the Klystron and the Collector was changed from copper to stainless steel. After a while these collectors would begin to leak and cause a vacuum failure in the Klystron. To correct the problem the OEM recommended the replacement of the D.I. cartridge with the "new" system to preserve the water quality. Now, please correct me if I've drawn the wrong conclusions, but doesn't it seem that all these water issues began after this water system "change" took place. My two cents ... The only things you need to be cautious about regarding the water system is leaving mineral deposits on the Klystron Collector (these deposits would interfere with the uniform water cooling of the collector) and anything that could plug the bending magnet cooling lines (saw this only once). By the way, water resistivity cannot cause Bend magnet faults. If you doubt this email me and I'll give you a very valid explanation. I have just been involved with a target change on a H.E. machine and inspected the water hoses in the gantry. They were replaced about six years ago and were in remarkably GOOD condition. The DI had been changed maybe once per year. The only water used was distilled water. Conclusion ... Don't use any water with a mineral content. Don't be too aggressive in replacing the DI cartridges. End of story! I would welcome your comments. Garry ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 08 23:44:10 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DtBS-0006yU-00; Thu, 08 May 2003 23:44:10 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 764E8110609; Thu, 8 May 2003 23:37:30 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id QAA11778 for linac-eng-list; Thu, 8 May 2003 16:14:32 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA11774 for ; Thu, 8 May 2003 16:14:29 -0500 (CDT) Received: from Mailsweeper.chhlth.govt.nz (mailsweeper.chhlth.govt.nz [159.117.16.14]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h48LEZ4A019330 for ; Fri, 9 May 2003 09:14:35 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by Mailsweeper.chhlth.govt.nz (Content Technologies SMTPRS 4.2.5) with ESMTP id for ; Fri, 9 May 2003 09:08:38 -0500 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Fri, 09 May 2003 09:13:55 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Fri, 09 May 2003 09:13:45 +1200 From: "Dave Pinchin" To: , Subject: Sorry, all. I misread Garry's last posting Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id QAA11775 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 09 May 2003 09:13:45 +1200 From: "Dave Pinchin" To: , Subject: Sorry, all. I misread Garry's last posting Content-Disposition: inline X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id QAA11775 Sender: owner-linac-eng@plato.aristotle.net G'day, Sorry, all. I misread Garry's last posting :D For the most part of the first 20 years of these machines the only "water related" failures seemed to be the TARGET failures. All the Bend magnet leaks and FOCUS COIL leaks first started appearing after the OEM "upgrade" the water system filtering. That should speak volumes. Our target leak was definately POST the oem "upgrade". Sorry Garry. :) ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 09 06:13:28 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19DzGC-0007Qf-00; Fri, 09 May 2003 06:13:28 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 47C91112D71; Fri, 9 May 2003 06:06:49 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id WAA17118 for linac-eng-list; Thu, 8 May 2003 22:44:56 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from smtp-out.comcast.net (smtp-out.comcast.net [24.153.64.116]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id WAA17113 for ; Thu, 8 May 2003 22:44:54 -0500 (CDT) Received: from cc201952a (pcp03397258pcs.tsclos01.al.comcast.net [68.38.44.129]) by mtaout04.icomcast.net (iPlanet Messaging Server 5.2 HotFix 1.14 (built Mar 18 2003)) with SMTP id <0HEL006SZP1KYX@mtaout04.icomcast.net> for linac-eng@plato.aristotle.net; Thu, 08 May 2003 23:44:08 -0400 (EDT) Date: Thu, 08 May 2003 22:48:14 -0500 From: Luke Smith Subject: Re: Siemens maggi follow pot To: linacs , Linac List Reply-To: Luke Smith Message-id: <002001c315dd$d20e15c0$812c2644@tsclos01.al.comcast.net> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Mailer: Microsoft Outlook Express 6.00.2800.1158 Content-type: multipart/alternative; boundary="Boundary_(ID_PmYs4yj6Ydw9iMEzlMN5Wg)" X-Priority: 3 X-MSMail-priority: Normal References: <004001c3150e$5ba6f660$55df4541@3vhgn01> Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 08 May 2003 22:48:14 -0500 From: Luke Smith Subject: Re: Siemens maggi follow pot To: linacs , Linac List Reply-To: Luke Smith X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Priority: 3 X-MSMail-priority: Normal Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. --Boundary_(ID_PmYs4yj6Ydw9iMEzlMN5Wg) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT go here. I think they may have what you seek: http://www.metcoelectronics.com Luke Smith Southeast Cancer Network, P.C. ----- Original Message ----- From: linacs To: Linac List Sent: Wednesday, May 07, 2003 10:03 PM Subject: Siemens maggi follow pot Hello list, Would anyone know a sourse for a Conventional Siemens follow pot for the magnetron (ie AFC). I have the following information, but cannot find a manufacturer: Helipot FS-RS-L50C R1K Thanks in advance Luis --Boundary_(ID_PmYs4yj6Ydw9iMEzlMN5Wg) Content-type: text/html; charset=iso-8859-1 Content-transfer-encoding: 7BIT

go here. I think they may have what you seek:

http://www.metcoelectronics.com

Luke Smith

Southeast Cancer Network, P.C.

----- Original Message -----

From: linacs

To: Linac List

Sent: Wednesday, May 07, 2003 10:03 PM

Subject: Siemens maggi follow pot

Hello list,

Would anyone know a sourse for a Conventional Siemens follow pot for the magnetron (ie AFC).

I have the following information, but cannot find a manufacturer:

Helipot FS-RS-L50C R1K

Thanks in advance

Luis

--Boundary_(ID_PmYs4yj6Ydw9iMEzlMN5Wg)-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 09 18:30:49 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19EAll-0006Ee-00; Fri, 09 May 2003 18:30:49 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id CBC52112D41 for ; Fri, 9 May 2003 18:24:08 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVP43F214W8X9O4Q@med.uu.nl> for kok@radth.med.uu.nl; Fri, 9 May 2003 18:22:17 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVP43BYKWK8XADE3@med.uu.nl> for kok@radth.med.uu.nl; Fri, 09 May 2003 18:22:14 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA23619 for linac-eng-list; Fri, 09 May 2003 09:23:19 -0500 (CDT) Received: from mail8.nhs.uk (mail8.nhs.uk [213.120.235.86]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA23615 for ; Fri, 09 May 2003 09:23:17 -0500 (CDT) Received: from [194.62.42.123] (helo=relayint2.nhs.uk) by mail8.nhs.uk with esmtp (Exim 4.10) id 19E8lo-00007X-00 for linac-eng@plato.aristotle.net; Fri, 09 May 2003 15:22:44 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B600BDF1C9 for linac-eng@plato.aristotle.net; Fri, 09 May 2003 15:22:44 +0100 Received: from carrot.ruh-bath.nhs.uk (194.189.240.90) by relay.nhs.uk (Syntegra-4 7.0.008) (authenticated as smtp-in_ruh-bath_swest_nhs_uk@es2002.nhs.uk) id 3EA928AC0023F1A9 for linac-eng@plato.aristotle.net; Fri, 09 May 2003 15:22:44 +0100 Received: by carrot.ruh-bath.swest.nhs.uk with Internet Mail Service (5.5.2653.19) id <2CQ17BRC>; Fri, 09 May 2003 15:22:43 +0100 Date: Fri, 09 May 2003 15:22:35 +0100 From: "Amesbury, Ross" Subject: Siemens MLC Sender: owner-linac-eng@plato.aristotle.net To: "'linac-eng@plato.aristotle.net'" Message-id: <1F3B1695594CBE4EA34A153F14F31FDD1ADB08@carrot.ruh-bath.swest.nhs.uk> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: text/plain; charset="iso-8859-1" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Fri, 09 May 2003 15:22:35 +0100 From: "Amesbury, Ross" Subject: Siemens MLC Sender: owner-linac-eng@plato.aristotle.net To: "'linac-eng@plato.aristotle.net'" X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Hi All We are having problems with leaf 29 sticking on our Primus MLC, every time we get to the machine it seem to work fine in manual mode. Has any one had experience of this and dose any one use a lubricant on the MLC leafs. Regards Ross Amesbury Royal United Hospital Bath UK 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Sat May 10 20:41:00 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19EZHI-0007lJ-00; Sat, 10 May 2003 20:41:00 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8312F1112F2; Sat, 10 May 2003 20:34:10 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id NAA13494 for linac-eng-list; Sat, 10 May 2003 13:13:44 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-d05.mx.aol.com (imo-d05.mx.aol.com [205.188.157.37]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id NAA13490 for ; Sat, 10 May 2003 13:13:42 -0500 (CDT) From: Virago1100@aol.com Received: from Virago1100@aol.com by imo-d05.mx.aol.com (mail_out_v34.22.) id m.bf.3181e4e2 (3310); Sat, 10 May 2003 14:12:27 -0400 (EDT) Message-ID: Date: Sat, 10 May 2003 14:12:27 EDT Subject: Re: Varian water quality related failures To: Dave.Pinchin@cdhb.govt.nz, GARRYANGEL@aol.com, linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_bf.3181e4e2.2bee9b0b_boundary" X-Mailer: 8.0 for Windows sub 6014 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Virago1100@aol.com Date: Sat, 10 May 2003 14:12:27 EDT Subject: Re: Varian water quality related failures To: Dave.Pinchin@cdhb.govt.nz, GARRYANGEL@aol.com, linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_bf.3181e4e2.2bee9b0b_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Okay... I can't help it, I have to put in my "two cents" worth! I, for the most part, agree with Gary (and its not just because he has a year or two on me in working in this field!) As far as BMAG leaks, I to have seen BMAG leaks in the 3% slits.... Enough times over the years that we have developed an epoxy technique to repair them without replacement. I have a copy of a failure analysis that was done by an engineering company on one of the BMAG's, in a nut shell the failure is blamed on "aggressive" water and mechanical design. I feel that the design has more to do with it than the water. The cooling hole that is drilled thru the copper block of the energy slit is skewed toward one side such that the resulting wall thickness on that side is only about 20% of what the thickness is on the other sides..... The "weak link." To quote the report.... "The component failed due to through wall pitting corrosion induced by the aggressive nature of the cooling water..... the entire interior surface was heavily corroded." And... "The coolant circulation lines were not centered in the copper fixture, but were skewed towards the top of the component. The wall thickness on the top of the component was many times less than on the bottom. Regardless of the wall thickness, under the operating conditions observed with this component, through-wall penetration will occur. With less wall thickness, penetration will occur more quickly." My feeling is that, even given the aggressive nature of the pure water, if it were not for the one super thin wall on the cooling block, one would probably see far fewer slit leaks. More of a design problem "aggravated" by the aggressive water...... On the subject of BMAG faults due to water conductivity....... I have to agree with Gary. I have been dealing with these machines for ~23 years, seen a wide range of water conductivity, but have never seen BMAG faults attributed to the water. However, I have seen a couple early 2100's that were claimed to have intermittent BMAG faults due to the water but the problem actually turned out to be noise induced due to a missing ground. The ground on the BMAG negative supply output was inadvertently left off some of the earlier machines..... Varian eventually came out with a fix which was to replace a 1K resistor (between BMAG - and analog ground) with a jumper, thus restoring the ground on the supply's negative output. I believe it was R41 in the fault circuit. Now you have my two cents (sense?) worth :-) Jim McKenzie --part1_bf.3181e4e2.2bee9b0b_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Okay... I can't help it, I have to put in my "two cent= s" worth!

I, for the most part, agree with Gary (and its not just because he has a yea= r or two on me in working in this field!)
As far as BMAG leaks, I to have seen BMAG leaks in the 3% slits.... Enough t= imes over the years that we have developed an epoxy technique to repair them= without replacement. I have a copy of a failure analysis that was done by a= n engineering company on one of the BMAG's, in a nut shell the failure is bl= amed on "aggressive" water and mechanical design. I feel that the design has= more to do with it than the water. The cooling hole that is drilled thru th= e copper block of the energy slit is skewed toward one side such that the re= sulting wall thickness on that side is only about 20% of what the thickness=20= is on the other sides..... The "weak link."
To quote the report.... "The component failed due to through wall pitting= corrosion induced by the aggressive nature of the cooling water..... the en= tire interior surface was heavily corroded."
And... "The coolant circulation lines were not centered in the copper fix= ture, but were skewed towards the top of the component. The wall thickness o= n the top of the component was many times less than on the bottom. Regardles= s of the wall thickness, under the operating conditions observed with this c= omponent, through-wall penetration will occur. With less wall thickness, pen= etration will occur more quickly."

My feeling is that, even given the aggressive nature of the pure water,=20= if it were not for the one super thin wall on the cooling block, one would p= robably see far fewer slit leaks. More of a design problem "aggravated" by t= he aggressive water......

On the subject of BMAG faults due to water conductivity....... I have to agr= ee with Gary. I have been dealing with these machines for ~23 years, seen a=20= wide range of water conductivity, but have never seen BMAG faults attributed= to the water.
However, I have seen a couple early 2100's that were claimed to have intermi= ttent BMAG faults due to the water but the problem actually turned out to be= noise induced due to a missing ground. The ground on the BMAG negative supp= ly output was inadvertently left off some of the earlier machines..... Varia= n eventually came out with a fix which was to replace a 1K resistor (between= BMAG - and analog ground) with a jumper, thus restoring the ground on= the supply's negative output. I believe it was R41 in the fault circuit. --part1_bf.3181e4e2.2bee9b0b_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Sun May 11 08:19:59 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19EkBj-0000mS-00; Sun, 11 May 2003 08:19:59 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B4D8A1112F9; Sun, 11 May 2003 08:13:09 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id AAA20294 for linac-eng-list; Sun, 11 May 2003 00:49:28 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from smtp805.mail.sc5.yahoo.com (smtp805.mail.sc5.yahoo.com [66.163.168.184]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id AAA20290 for ; Sun, 11 May 2003 00:49:26 -0500 (CDT) Received: from adsl-216-103-85-50.dsl.snfc21.pacbell.net (HELO REIDGPC1) (dgreco@pacbell.net@216.103.85.50 with login) by smtp-sbc-v1.mail.vip.sc5.yahoo.com with SMTP; 11 May 2003 05:49:25 -0000 From: "Domenic Greco"

-----Original Message-----
From: GARRYANGEL@aol.com=20 [mailto:GARRYANGEL@aol.com]
Sent: Thursday, May 08, 2003 12:1= 5=20 PM
To: linac-eng@plato.aristotle.net
Subject: "Elab= orate"=20 TARGET FAILURE STUDY

<= FONT=20 lang=3D0 face=3DArial size=3D2 FAMILY=3D"SANSSERIF">Hello Everyone:
=
I believe I=20 have discovered a condition that could lead to target failures in the V= arian=20 H.E. systems. As I mentioned in a prior post, it is NOT water related. = And=20 there is absolutely nothing you can do to the water system that could p= revent=20 these unnecessary TARGET failures. I just need additional information f= rom=20 anyone who has actively participated in a TARGET replacement. or has ac= cess to=20 the machine parameters both before and after the Target failure. The mo= rning=20 check log would be excellent. All you need to do is email the rec= orded=20 parameters for one of the X-ray energies. I await you responses. = Thank=20 you in advance.

Garry

This information is confidential and int= ended solely for the use of the individual or entity to whom it is addres= sed.

If you have received this email in error= please notify the sender or our Help Desk at (262) 928-2777.

We have scanned this email and its attac= hments for malicious content.

However, the recipient should check this= email and any attachments for the presence of viruses.

ProHealth Care, Inc. accepts no liabilit= y for any damage caused by any virus transmitted by this email.
------_=_NextPart_001_01C3186D.1BCF05C0-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 12 17:12:23 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19FEyV-0001q6-00; Mon, 12 May 2003 17:12:23 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 956F2112D47; Mon, 12 May 2003 17:05:27 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA12878 for linac-eng-list; Mon, 12 May 2003 09:44:38 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from scf.sk.ca (shin.communitynet.ca [216.174.136.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA12874 for ; Mon, 12 May 2003 09:44:37 -0500 (CDT) Received: from neried.scf.sk.ca (unverified [172.24.48.3]) by scf.sk.ca (Rockliffe SMTPRA 5.2.4) with SMTP id for ; Mon, 12 May 2003 08:44:35 -0600 Received: (from RPC035 [172.24.49.35]) by neried.scf.sk.ca (NAVGW 2.5.2.12) with SMTP id M2003051208435625773 ; Mon, 12 May 2003 08:43:56 -0600 From: scot thiesson To: "'linac-eng@plato.aristotle.net'" , "Amesbury, Ross" Date: Mon, 12 May 2003 08:44:46 -0600 X-Priority: 3 (Normal) Organization: a.b.c.c. In-Reply-To: <1F3B1695594CBE4EA34A153F14F31FDD1ADB08@carrot.ruh-bath.swest.nhs.uk> Message-Id: Subject: Re: Siemens MLC MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Mailer: Opera 6.0 build 1010 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: scot thiesson To: "'linac-eng@plato.aristotle.net'" , "Amesbury, Ross" Date: Mon, 12 May 2003 08:44:46 -0600 X-Priority: 3 (Normal) Organization: a.b.c.c. In-Reply-To: <1F3B1695594CBE4EA34A153F14F31FDD1ADB08@carrot.ruh-bath.swest.nhs.uk> Subject: Re: Siemens MLC Sender: owner-linac-eng@plato.aristotle.net The MLC leaves are not lubricated on the Siemens units. You can however first check that the unit is clean and running free by extending it and cleaning with a very high test alchohol. If you are experiencing a leaf that sticks it could be caused by a drive unit installed incorrectly. There should be a slight amount of backlash on the gear train when things are tightened down. You can check this by extending the leaf and verifying that it has a very slight amount of play. The leaf should also move without any jerking or roughness, usually also an indication that the drive modual is installed with not enough backlash. It's also possible that there is a problem with the servo drive section. You can swap those boards to trouble shoot that problem. Scot Thiesson Senior Physics Technician Allan Blair Cancer Centre Regina Saskatchewan Canada 306-766-2286 5/9/2003 8:22:35 AM, "Amesbury, Ross" wrote: >Hi All > >We are having problems with leaf 29 sticking on our Primus MLC, every time >we get to the machine it seem to work fine in manual mode. Has any one had >experience of this and dose any one use a lubricant on the MLC leafs. > >Regards >Ross Amesbury >Royal United Hospital >Bath >UK > > > 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 12 19:48:15 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19FHPL-0002R5-00; Mon, 12 May 2003 19:48:15 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id CA1D0112D67 for ; Mon, 12 May 2003 19:41:21 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVTDN3K8288X0S2K@med.uu.nl> for kok@radth.med.uu.nl; Mon, 12 May 2003 19:39:24 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVTDN1MYQW8XMPMT@med.uu.nl> for kok@radth.med.uu.nl; Mon, 12 May 2003 19:39:23 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA13827 for linac-eng-list; Mon, 12 May 2003 10:29:36 -0500 (CDT) Received: from mail3.nhs.uk (mail3.nhs.uk [194.72.23.240]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id KAA13823 for ; Mon, 12 May 2003 10:29:30 -0500 (CDT) Received: from hn-ext by mail3.nhs.uk (Sendmail 8.8.8) with esmtp id 19FFEn-0006aS-00; Mon, 12 May 2003 16:29:13 +0100 Received: from relay.nhs.uk (194.62.42.144) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3E60771200B7A72B for linac-eng@plato.aristotle.net; Mon, 12 May 2003 16:29:13 +0100 Received: from exchange2.hillsrd (193.130.72.200) by relay.nhs.uk (Syntegra-4 7.0.008) (authenticated as smtp_addenbrookes_nhs_uk@es2002.nhs.uk) id 3EBBEC040002D708 for linac-eng@plato.aristotle.net; Mon, 12 May 2003 16:29:13 +0100 Received: by smtp.addenbrookes.nhs.uk with Internet Mail Service (5.5.2653.19) id ; Mon, 12 May 2003 16:30:11 +0100 Date: Mon, 12 May 2003 16:30:10 +0100 From: "Twyman, Paul" Subject: RE: Varian DKB Sender: owner-linac-eng@plato.aristotle.net To: "'linac-eng@plato.aristotle.net'" Message-id: <07EBC420AD13D5118C6A0002A52865C204519054@smtp.addenbrookes.nhs.uk> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: text/plain; charset="iso-8859-1" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Mon, 12 May 2003 16:30:10 +0100 From: "Twyman, Paul" Subject: RE: Varian DKB Sender: owner-linac-eng@plato.aristotle.net To: "'linac-eng@plato.aristotle.net'" X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Hi to all. I have in the past repaired the older style Varian DKB's when they fail. The common failure mode is that the 'enter' function goes intermittent. I used to cut and paste the redundant couch components into the faulty enter place. Cheap but practical I felt. With a view to solving this problem I replaced our older style DKB's with the newer membrane style. I have just had our first newer style DBK failure due to the enter function going intermittent. The membrane has failed. I have asked Varian if they are able to supply a new membrane and they are working on it. Does anyone out there know of a second source for these membranes or if Varian are able to supply them. A part number would be most useful. Thankyou in advance. Paul Twyman MTO5 Medical Physics Dept. Box 152 Addenbrookes Hospital. Hills Rd. Cambridge. CB2 2QQ Tel 01223-586782 Fax 01223 257137 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 12 19:59:11 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19FHZv-0002SH-00; Mon, 12 May 2003 19:59:11 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id C8F24112D69 for ; Mon, 12 May 2003 19:52:17 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KVTE1MO9WW8XAXCI@med.uu.nl> for kok@radth.med.uu.nl; Mon, 12 May 2003 19:50:20 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KVTE1KPBNI8XMPMT@med.uu.nl> for kok@radth.med.uu.nl; Mon, 12 May 2003 19:50:19 +0200 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id KAA14129 for linac-eng-list; Mon, 12 May 2003 10:38:57 -0500 (CDT) Received: from nasvir01.nas.medcity.net (mail.nas.medcity.net [199.91.33.30]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id KAA14125 for ; Mon, 12 May 2003 10:38:55 -0500 (CDT) Received: from 165.214.16.65 by nasvir01.nas.medcity.net (InterScan E-Mail VirusWall NT); Mon, 12 May 2003 10:38:43 -0500 Received: by corpexcon01.corp.medcity.net with Internet Mail Service (5.5.2655.55) id ; Mon, 12 May 2003 10:37:42 -0500 Date: Mon, 12 May 2003 10:38:05 -0500 From: Tirabassi Michael Subject: RE: Varian water quality related failures Sender: owner-linac-eng@plato.aristotle.net To: "'Virago1100@aol.com'" , "Linac list (E-mail)" Message-id: <39A90AC123CB9D428821E2BC273E73CD01F86671@ftwex03.ftw.medcity.net> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-type: MULTIPART/MIXED; BOUNDARY="Boundary_(ID_rHwFV0b/4DvF0zlTedhT1Q)" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Mon, 12 May 2003 10:38:05 -0500 From: Tirabassi Michael Subject: RE: Varian water quality related failures Sender: owner-linac-eng@plato.aristotle.net To: "'Virago1100@aol.com'" , "Linac list (E-mail)" X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --Boundary_(ID_rHwFV0b/4DvF0zlTedhT1Q) Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_sFOzAx05B+Y0J7XKPNGNiw)" --Boundary_(ID_sFOzAx05B+Y0J7XKPNGNiw) Content-type: text/plain; charset="ISO-8859-1" We had a target fail back in 1998 on our 1800 #46. Target about 12 years old. Massive water to Vac leak. Opened up the main body valve and took a bath! Target wall had cracked on one side of the 6x output side. Attributed the failure not to water but to "thin wall syndrome", difference in wall thickness from one side to the other. It also appeared that the target was minutely striking the wall of the bend magnet when returning to no mode position (18x). Add up all the forces at work and presto, your guide becomes a hot water tank. One other thing I'll mention, on our 21EX machine the accelerator solenoid is always "hot" with a high voltage on it until you program an energy then voltage drops to program value. On the 1800 machine, guide solenoid is "cold" until you program an energy. Voltage then rises to program value. I experimented with the additive junk by only adding it one time to each machine when water was changed using off the shelf distilled h2o. Waited one year and then change water and found the filter on the 21EX had more garbage on it than the 1800 filter. Never had any water problems with the 1800 changing about every nine months using ordinary distilled h2o. Same water used , same filter setup, same chemicals added in both machines, same type of heat exchanger, same everything except for the guide solenoid no mode voltage. This may not mean anything just thought it to be curious! Anybody care to comment on this! Mike T. -----Original Message----- From: Virago1100@aol.com [mailto:Virago1100@aol.com] Sent: Saturday, May 10, 2003 1:12 PM To: Dave.Pinchin@cdhb.govt.nz; GARRYANGEL@aol.com; linac-eng@plato.aristotle.net Subject: Re: Varian water quality related failures Okay... I can't help it, I have to put in my "two cents" worth! I, for the most part, agree with Gary (and its not just because he has a year or two on me in working in this field!) As far as BMAG leaks, I to have seen BMAG leaks in the 3% slits.... Enough times over the years that we have developed an epoxy technique to repair them without replacement. I have a copy of a failure analysis that was done by an engineering company on one of the BMAG's, in a nut shell the failure is blamed on "aggressive" water and mechanical design. I feel that the design has more to do with it than the water. The cooling hole that is drilled thru the copper block of the energy slit is skewed toward one side such that the resulting wall thickness on that side is only about 20% of what the thickness is on the other sides..... The "weak link." To quote the report.... "The component failed due to through wall pitting corrosion induced by the aggressive nature of the cooling water..... the entire interior surface was heavily corroded." And... "The coolant circulation lines were not centered in the copper fixture, but were skewed towards the top of the component. The wall thickness on the top of the component was many times less than on the bottom. Regardless of the wall thickness, under the operating conditions observed with this component, through-wall penetration will occur. With less wall thickness, penetration will occur more quickly." My feeling is that, even given the aggressive nature of the pure water, if it were not for the one super thin wall on the cooling block, one would probably see far fewer slit leaks. More of a design problem "aggravated" by the aggressive water...... On the subject of BMAG faults due to water conductivity....... I have to agree with Gary. I have been dealing with these machines for ~23 years, seen a wide range of water conductivity, but have never seen BMAG faults attributed to the water. However, I have seen a couple early 2100's that were claimed to have intermittent BMAG faults due to the water but the problem actually turned out to be noise induced due to a missing ground. The ground on the BMAG negative supply output was inadvertently left off some of the earlier machines..... Varian eventually came out with a fix which was to replace a 1K resistor (between BMAG - and analog ground) with a jumper, thus restoring the ground on the supply's negative output. I believe it was R41 in the fault circuit. Now you have my two cents (sense?) worth :-) Jim McKenzie --Boundary_(ID_sFOzAx05B+Y0J7XKPNGNiw) Content-type: text/html; charset="ISO-8859-1"

-----Original Message-----
From: Virago1100@aol.com [mailto:Virago1100@aol.com]
Sent: Saturday, May 10, 2003 1:12 PM
To: Dave.Pinchin@cdhb.govt.nz; GARRYANGEL@aol.com; linac-eng@plato.aristotle.net
Subject: Re: Varian water quality related failures

Okay... I can't help it, I have to put in my "two cents" worth!

I, for the most part, agree with Gary (and its not just because he has a year or two on me in working in this field!)
As far as BMAG leaks, I to have seen BMAG leaks in the 3% slits.... Enough times over the years that we have developed an epoxy technique to repair them without replacement. I have a copy of a failure analysis that was done by an engineering company on one of the BMAG's, in a nut shell the failure is blamed on "aggressive" water and mechanical design. I feel that the design has more to do with it than the water. The cooling hole that is drilled thru the copper block of the energy slit is skewed toward one side such that the resulting wall thickness on that side is only about 20% of what the thickness is on the other sides..... The "weak link."
To quote the report.... "The component failed due to through wall pitting corrosion induced by the aggressive nature of the cooling water..... the entire interior surface was heavily corroded."
And... "The coolant circulation lines were not centered in the copper fixture, but were skewed towards the top of the component. The wall thickness on the top of the component was many times less than on the bottom. Regardless of the wall thickness, under the operating conditions observed with this component, through-wall penetration will occur. With less wall thickness, penetration will occur more quickly."

My feeling is that, even given the aggressive nature of the pure water, if it were not for the one super thin wall on the cooling block, one would probably see far fewer slit leaks. More of a design problem "aggravated" by the aggressive water......

On the subject of BMAG faults due to water conductivity....... I have to agree with Gary. I have been dealing with these machines for ~23 years, seen a wide range of water conductivity, but have never seen BMAG faults attributed to the water.
However, I have seen a couple early 2100's that were claimed to have intermittent BMAG faults due to the water but the problem actually turned out to be noise induced due to a missing ground. The ground on the BMAG negative supply output was inadvertently left off some of the earlier machines..... Varian eventually came out with a fix which was to replace a 1K resistor (between BMAG - and analog ground) with a jumper, thus restoring the ground on the supply's negative output. I believe it was R41 in the fault circuit.

Now you have my two cents (sense?) worth :-)

Jim McKenzie

--Boundary_(ID_sFOzAx05B+Y0J7XKPNGNiw)-- --Boundary_(ID_rHwFV0b/4DvF0zlTedhT1Q)-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 12 21:42:54 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19FJCI-0002cU-00; Mon, 12 May 2003 21:42:54 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id BD439113641; Mon, 12 May 2003 21:35:57 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA19779 for linac-eng-list; Mon, 12 May 2003 14:09:58 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from bajor.cancercare.on.ca ([142.76.1.63]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA19775 for ; Mon, 12 May 2003 14:09:56 -0500 (CDT) Received: by bajor.tsrcc.on.ca with Internet Mail Service (5.5.2653.19) id ; Mon, 12 May 2003 15:09:12 -0400 Message-ID: <4631AA4F502ED711AE0700A0C9EBCF2964F57D@bajor.tsrcc.on.ca> From: "Rozenblat, Alex"

To: linac-eng@plato.aristotle.n= et=20

Sent: Wednesday, May 21, 2003 = 21:43

Subject: optic cleaner

Hi Everyone,

Can I have any suggestion as to what type of optic cleaner I can = use to my=20 Elekta-Precise optic system? I am preferring to buy in the local = market.

Thanks,

Bong

Philippines

Do you Yahoo!?
T= he New=20 Yahoo! Search - Faster. Easier. Bingo. --Boundary_(ID_iRKDZWqvxJSTMWby7ja01A)-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 22 20:51:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19IvAH-0002Mb-00; Thu, 22 May 2003 20:51:45 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A49F411131D; Thu, 22 May 2003 20:50:32 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id NAA16429 for linac-eng-list; Thu, 22 May 2003 13:19:51 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICO.MGH.HARVARD.EDU (phsexchico.mgh.harvard.edu [132.183.126.50]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id NAA16425 for ; Thu, 22 May 2003 13:19:42 -0500 (CDT) Received: by phsexchico.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id <2JPKMBWC>; Thu, 22 May 2003 14:19:11 -0400 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F1BD@phsexch6.partners.org> From: "Maddox, Buford J" To: "'Williams, Rod'" , "'Randy.McVittie@lrcc.on.ca'" , scot thiesson Cc: linac-eng Subject: RE: RE: Varian GFIL digital gun deck Date: Thu, 22 May 2003 14:19:09 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C3208E.79AC84A0" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'Williams, Rod'" , "'Randy.McVittie@lrcc.on.ca'" , scot thiesson Cc: linac-eng Subject: RE: RE: Varian GFIL digital gun deck Date: Thu, 22 May 2003 14:19:09 -0400 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C3208E.79AC84A0 Content-Type: text/plain; charset="iso-8859-1" U2 is the A/D chip,on the fil ps pcb. But the V ref for my c3 is Q1, an analog devices 590. Jerry -----Original Message----- From: Williams, Rod [mailto:rod.williams@phci.org] Sent: Wednesday, May 21, 2003 10:34 AM To: Maddox, Buford J; 'Randy.McVittie@lrcc.on.ca'; scot thiesson Cc: linac-eng Subject: RE: RE: Varian GFIL digital gun deck Hi I have seen references to the A to D converter chips and now to the V Ref chip, I have not had any problems with my Gun deck other than a couple of Hot deck boards. Just so I understand is everybody talking about the A to D labeled U2 on the filament pwr board and U5 for the V Ref. ?? -----Original Message----- From: Maddox, Buford J [ mailto:JMADDOX@LROC.HARVARD.EDU ] Sent: Wednesday, May 21, 2003 6:19 AM To: 'Randy.McVittie@lrcc.on.ca'; scot thiesson Cc: linac-eng Subject: RE: RE: Varian GFIL digital gun deck An A/D+ error we had was very brief, didn't latch, had to stand there and catch it when it flickered. V reference chip for the A/D was the culprit. Have seen the microswitch faults on the crowbars in the gun and modulator, often just an adjustment. One interesting scenario let the gun HV come on when the crowbar was closed, resistor got warm, HV was down some. Another time a bent cover switch stuck, HV was on without cover. Assume nothing, always use hookstick! And keep the warning bulbs working. Jerry -----Original Message----- From: Randy.McVittie@lrcc.on.ca [ mailto:Randy.McVittie@lrcc.on.ca ] Sent: Tuesday, May 20, 2003 6:02 PM To: scot thiesson Cc: linac-eng Subject: Re: RE: Varian GFIL digital gun deck The only thing we've seen like this has been due to a flakey A to D converter on the hot deck. The GFIL interlock line would drop out so quick, but the GUN DECK controller wouldn't report any message. The chip is in a socket so it doesn't take too long to swap out. Randy This information is confidential and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777. We have scanned this email and its attachments for malicious content. However, the recipient should check this email and any attachments for the presence of viruses. ProHealth Care, Inc. accepts no liability for any damage caused by any virus transmitted by this email. ------_=_NextPart_001_01C3208E.79AC84A0 Content-Type: text/html; charset="iso-8859-1" RE: RE: Varian GFIL digital gun deck

U2 is the A/D chip,on the fil ps pcb. But the V ref for my c3 is Q1, an analog devices 590.

Jerry

-----Original Message-----
From: Williams, Rod [mailto:rod.williams@phci.org]
Sent: Wednesday, May 21, 2003 10:34 AM
To: Maddox, Buford J; 'Randy.McVittie@lrcc.on.ca'; scot thiesson
Cc: linac-eng
Subject: RE: RE: Varian GFIL digital gun deck

Hi

I have seen references to the A to D converter chips and now to the V Ref chip, I have not had any problems with my Gun deck other than a couple of Hot deck boards. Just so I understand is everybody talking about the A to D labeled U2 on the filament pwr board and U5 for the V Ref. ??

-----Original Message-----
From: Maddox, Buford J [mailto:JMADDOX@LROC.HARVARD.EDU]
Sent: Wednesday, May 21, 2003 6:19 AM
To: 'Randy.McVittie@lrcc.on.ca'; scot thiesson
Cc: linac-eng
Subject: RE: RE: Varian GFIL digital gun deck

An A/D+ error we had was very brief, didn't latch, had to stand there and
catch it when it flickered. V reference chip for the A/D was the culprit.
Have seen the microswitch faults on the crowbars in the gun and modulator,
often just an adjustment. One interesting scenario let the gun HV come on
when the crowbar was closed, resistor got warm, HV was down some. Another
time a bent cover switch stuck, HV was on without cover. Assume nothing,
always use hookstick! And keep the warning bulbs working.
Jerry

-----Original Message-----
From: Randy.McVittie@lrcc.on.ca [mailto:Randy.McVittie@lrcc.on.ca]
Sent: Tuesday, May 20, 2003 6:02 PM
To: scot thiesson
Cc: linac-eng
Subject: Re: RE: Varian GFIL digital gun deck

The only thing we've seen like this has been due to a flakey A to D
converter on
the hot deck.
The GFIL interlock line would drop out so quick, but the GUN DECK controller
wouldn't report any message.
The chip is in a socket so it doesn't take too long to swap out.

Randy

This information is confidential and intended solely for the use of the individual or entity to whom it is addressed.
If you have received this email in error please notify the sender or our Help Desk at (262) 928-2777.

We have scanned this email and its attachments for malicious content.
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------_=_NextPart_001_01C3208E.79AC84A0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 22 22:33:08 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19IwkO-0002Xs-00; Thu, 22 May 2003 22:33:08 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2C08E1105E5; Thu, 22 May 2003 22:31:56 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA18475 for linac-eng-list; Thu, 22 May 2003 14:51:12 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from 17RADLAPPC01 ([65.174.193.174]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id OAA18471 for ; Thu, 22 May 2003 14:51:09 -0500 (CDT) Message-Id: <5.1.0.14.0.20030522154819.00a5a150@mailhost.det.ameritech.net> X-Sender: smange@mailhost.det.ameritech.net X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Thu, 22 May 2003 15:50:14 -0400 To: linac-eng@plato.aristotle.net From: Scott Mange Subject: PortalVision PMIs Mime-Version: 1.0 Content-Type: multipart/mixed; x-avg-checked=avg-ok-46165088; boundary="=======587B3262=======" X-GCMulti: 1 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f X-Sender: smange@mailhost.det.ameritech.net Date: Thu, 22 May 2003 15:50:14 -0400 To: linac-eng@plato.aristotle.net From: Scott Mange Subject: PortalVision PMIs X-GCMulti: 1 Sender: owner-linac-eng@plato.aristotle.net --=======587B3262======= Content-Type: text/plain; x-avg-checked=avg-ok-46165088; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Gentlemen, Can someone tell me please; 1) How often should a PortalVision PMI be done by the Varian Rep? Is this part of their regular quarterly PMIs? 2) How long should a PortalVision cassette last? 3) What is the replacement cost of a PortalVision cassette? Your help is greatly appreciated. Sincerely, Scott Mange --=======587B3262=======-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 23 00:38:07 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19IyhL-0002kc-00; Fri, 23 May 2003 00:38:07 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 28B0E1105ED; Fri, 23 May 2003 00:36:56 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA23556 for linac-eng-list; Thu, 22 May 2003 17:05:03 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imo-m05.mx.aol.com (imo-m05.mx.aol.com [64.12.136.8]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA23552 for ; Thu, 22 May 2003 17:05:02 -0500 (CDT) From: GARRYANGEL@aol.com Received: from GARRYANGEL@aol.com by imo-m05.mx.aol.com (mail_out_v36.3.) id y.12a.2a7ddd2d (4410) for ; Thu, 22 May 2003 18:04:27 -0400 (EDT) Message-ID: <12a.2a7ddd2d.2bfea36a@aol.com> Date: Thu, 22 May 2003 18:04:26 EDT Subject: Equipment Needed!! To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_12a.2a7ddd2d.2bfea36a_boundary" X-Mailer: 8.0 for Windows sub 910 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: GARRYANGEL@aol.com Date: Thu, 22 May 2003 18:04:26 EDT Subject: Equipment Needed!! To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --part1_12a.2a7ddd2d.2bfea36a_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Everyone: I am in need of (2) Cl-2100's, one with 6 & 10 MV and one 6 & 18 MV with Dual Independent jaws and Type 3 accessories preferred. MLC's would be a plus!! Also, looking for a later model (mid 90's) Ximatron CX and Cl-600C. I would appreciate any potential leads. Thank you in advance. Garry --part1_12a.2a7ddd2d.2bfea36a_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi Everyone:

I am in need of (2) Cl-2100's, one with 6 & 10 MV and one 6 & 18 MV=20= with Dual Independent jaws and Type 3 accessories preferred. MLC's would be=20= a plus!! Also, looking for a later model (mid 90's) Ximatron CX and Cl-600C.=

I would appreciate any potential leads.

Thank you in advance.

Garry --part1_12a.2a7ddd2d.2bfea36a_boundary-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 23 09:50:59 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19J7KN-0004We-00; Fri, 23 May 2003 09:50:59 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 742FF112D64 for ; Fri, 23 May 2003 09:49:45 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KW84G530HS8Y1BWE@med.uu.nl> for kok@radth.med.uu.nl; Fri, 23 May 2003 09:30:37 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KW7PAK5ER68Y4RXB@med.uu.nl> for kok@radth.med.uu.nl; Fri, 23 May 2003 01:44:00 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id RAA23556 for linac-eng-list; Thu, 22 May 2003 17:05:03 -0500 (CDT) Received: from imo-m05.mx.aol.com (imo-m05.mx.aol.com [64.12.136.8]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id RAA23552 for ; Thu, 22 May 2003 17:05:02 -0500 (CDT) Received: from GARRYANGEL@aol.com by imo-m05.mx.aol.com (mail_out_v36.3.) id y.12a.2a7ddd2d (4410) for ; Thu, 22 May 2003 18:04:27 -0400 (EDT) Date: Thu, 22 May 2003 18:04:26 -0400 (EDT) From: GARRYANGEL@aol.com Subject: Equipment Needed!! Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net Message-id: <12a.2a7ddd2d.2bfea36a@aol.com> MIME-version: 1.0 X-Mailer: 8.0 for Windows sub 910 Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_BOl5T0Qw+iSnJdg6MTBK9g)" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 22 May 2003 18:04:26 -0400 (EDT) From: GARRYANGEL@aol.com Subject: Equipment Needed!! Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f --Boundary_(ID_BOl5T0Qw+iSnJdg6MTBK9g) Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit Hi Everyone: I am in need of (2) Cl-2100's, one with 6 & 10 MV and one 6 & 18 MV with Dual Independent jaws and Type 3 accessories preferred. MLC's would be a plus!! Also, looking for a later model (mid 90's) Ximatron CX and Cl-600C. I would appreciate any potential leads. Thank you in advance. Garry --Boundary_(ID_BOl5T0Qw+iSnJdg6MTBK9g) Content-type: text/html; charset="US-ASCII" Content-transfer-encoding: quoted-printable Hi Everyone:

I am in need of (2) Cl-2100's, one with 6 & 10 MV and one 6 & 18 MV=20= with Dual Independent jaws and Type 3 accessories preferred. MLC's would be=20= a plus!! Also, looking for a later model (mid 90's) Ximatron CX and Cl-600C.=

I would appreciate any potential leads.

Thank you in advance.

Garry --Boundary_(ID_BOl5T0Qw+iSnJdg6MTBK9g)-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 23 16:40:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19JDiv-0001Hr-00; Fri, 23 May 2003 16:40:45 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 154E81105F6; Fri, 23 May 2003 16:39:29 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id JAA06163 for linac-eng-list; Fri, 23 May 2003 09:00:18 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail2.vcu.edu (mail2.vcu.edu [128.172.1.135]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA06159 for ; Fri, 23 May 2003 09:00:07 -0500 (CDT) Received: from hsc.vcu.edu ([208.31.209.254]) by mail2.vcu.edu (8.12.0/8.11.3) with ESMTP id h4NDxrIW084162 for ; Fri, 23 May 2003 09:59:53 -0400 Message-ID: <3ECE29A3.4030200@hsc.vcu.edu> Date: Fri, 23 May 2003 10:01:07 -0400 From: "Christopher L. Bartee" User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.2.1) Gecko/20021130 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linac-eng Subject: Some Humor. Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 23 May 2003 10:01:07 -0400 From: "Christopher L. Bartee" X-Accept-Language: en-us, en To: linac-eng Subject: Some Humor. Sender: owner-linac-eng@plato.aristotle.net I know this is not a forum for jokes, but this one just fits. I apologize in advance for any disturbance to anyone to serious to take time and just laugh. Chris, Comprehending Engineers - Take One Two engineering students were walking across campus when one said, "Where did you get such a great bike?" The second engineer replied, "Well, I was walking along yesterday minding my own business when a Beautiful woman rode up on this bike. She threw the bike to the ground, took off all her clothes and said, "Take what you want." The second engineer nodded approvingly, "Good choice; the clothes wouldn't have fit anyway." Lesson: Don't bother to drop even the most obvious hint, they can't catch anyway. (This is a reality! If you don't believe,test them!) Comprehending Engineers - Take Two To the optimist, the glass is half full. To the pessimist, the glass half empty. To the engineer, the glass is twice as big as it needs to be. Lesson: There is no philosophy to talk abt but calculations and calculations... Comprehending Engineers -Take Three A pastor, a doctor, and an engineer were waiting one morning for a particularly slow group of golfers. The engineer fumed, "What's with these guys? We must have been waiting for 15 minutes!" The doctor chimed in, "I don't know, but I've never seen such ineptitude". The pastor said, "Hey, here comes the greens keeper. Let's have a word with him." "Hi John. Say, what's with that group ahead of us? They're rather slow, aren't they?" The greens keeper replied, "Oh, yes, that's a group of blind firefighters. They lost their sight saving our clubhouse from a fire last year, so we always let them play for free anytime." The group was silent for a moment. Then the pastor said, "That's so sad I think I will say a special prayer for them tonight." The doctor said, "Good idea. And I'm going to contact my ophthalmologist buddy and see if there's anything he can do for them." The engineer, after much thought said, "Why can't these guys play at night?" Lesson: No emotions please, only practicality works here. Comprehending Engineers -Take Four What is the difference between Mechanical Engineers and Civil Engineers? Mechanical Engineers build weapons; Civil Engineers build targets. Lesson: They build and build and build and build and... to compliment one another. Comprehending Engineers -Take Five Three engineering students were gathered together discussing the possible designers of the human body. One said, "It was a mechanical engineer. Just look at all the joints." Another said, "No, it was an electrical engineer. The nervous system has many thousands of electrical connections." The last said, "Actually it was a civil engineer. Who else would run a toxic waste pipeline through a recreational area?" Lesson: All of them have their own theories. None for believing! Comprehending Engineers -Take Six "Normal people believe that if it ain't broke, don't fix it. Engineers believe that if it ain't broke, it doesn't have enough features yet." Lesson: They are complicated and twisted. Comprehending Engineers -Take Seven An architect, an artist, and an engineer were discussing whether It was better to spend time with a wife or a mistress. The architect said he enjoyed time with his wife, building a Solid foundation for an enduring relationship. The artist said he enjoyed time with his mistress, because of The passion and mystery he found there. The engineer said, "I like both." "Both?" "Yeah," replied the engineer. "If you have a wife and a mistress, they will each assume you are spending time with the other woman, and you can go to the lab and get some work done." Lesson: Gals, NEVER fall for an engineer!!! Comprehending Engine! ers - Take Eight An engineer was crossing a road one day when a frog called out to him and said, "If you kiss me, I'll turn into a beautiful princess." He bent over, picked up the frog and put it in his pocket. The frog spoke up again and said, "If you kiss me and turn me back into a beautiful princess, I will stay with you for one week." The engineer took the frog out of his pocket, smiled at it and Returned it to the pocket. The frog then cried out, "If you kiss me and turn me back into a beautiful princess I'll stay with you and do ANYTHING you want." Again the engineer took the frog out, smiled at it and put it back into his pocket. Finally, the frog asked, "What is the matter? I've told you I'm A beautiful princess, that I'll stay with you for a week and do anything you want. Why won't you kiss me?" The engineer said, "Look I'm an engineer. I don't have time for a girlfriend, but a TALKING frog, now that's cool! Lesson: Once again, gals, NEVER fall for an engineer!!!!! 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 23 22:22:51 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19JJ3z-0001yt-00; Fri, 23 May 2003 22:22:51 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 99D2E110617; Fri, 23 May 2003 22:21:33 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id OAA14033 for linac-eng-list; Fri, 23 May 2003 14:42:52 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICI.MGH.HARVARD.EDU (phsexchici.mgh.harvard.edu [132.183.126.51]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA14029 for ; Fri, 23 May 2003 14:42:49 -0500 (CDT) Received: by phsexchici.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id ; Fri, 23 May 2003 15:42:12 -0400 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F1C1@phsexch6.partners.org> From: "Maddox, Buford J" To: "'Coley Chris (RDE) Essex Rivers'" , linac-eng@plato.aristotle.net Subject: RE: Warning - Varian 2100 Users Date: Fri, 23 May 2003 15:42:10 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C32163.66681C26" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'Coley Chris (RDE) Essex Rivers'" , linac-eng@plato.aristotle.net Subject: RE: Warning - Varian 2100 Users Date: Fri, 23 May 2003 15:42:10 -0400 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C32163.66681C26 Content-Type: text/plain; charset="iso-8859-1" A similar story: During the original demo of a 2100 here, fireworks came from the inside of the console. Flashes and bangs, very exciting. A new light control relay had shorted, coil to contacts, putting 277vac on the 24vdc line. All backplanes, RF driver, many pcbs, etc. were zapped. We now use an extra isolation relay in those circuits, and do not allow any equivalent relays, only the specified one. Varian got the machine working again in an amazingly short time. The expense was large, the lawsuits tedious. Although an ac relay had accidentally been used in place of a dc by a contractor, no relay should ever short this way under any circumstances, in my opinion. Jerry -----Original Message----- From: Coley Chris (RDE) Essex Rivers [mailto:Chris.Coley@essexrivers.nhs.uk] Sent: Wednesday, May 21, 2003 6:29 AM To: linac-eng@plato.aristotle.net Subject: Warning - Varian 2100 Users Dear All Just a word of warning to other Varian 2100 users which may save a lot of money and time. Whilst servicing, I had taken off the interface mount, rotated it 180 degrees and rested it on top of the gantry (On a cushion). About a minute later I smelt smoke and saw some black smuts rising above the Stand. So I hit the emergency off button. What had happened was the 34 way ribbon cable from the interface mount had shorted to the ring of lead around the collimator. There was a very small hole in the insulation of the ribbon cable on the +24v reset line. The cause of the insulation loss is probably down to us, as I don't disconnect the ribbon cable when removing the interface mount. The cable is a bit stretched when the interface mount is lying on the gantry. The fault caused severe damage to the machine as I think we drew lots of current from the 24 v PSU and this caused the tracks to heat up on the Stand Motherboard. Then I think 110v AC flashed over to the +24v tracks. The Motherboard had quite a large area that had turned to carbon. The boards that where replaced or repaired are listed below. Stand Motherboard. All four of the PWM boards Carrousel Mode and BMAG board CRADC board Output Interface board 1 Pendant PV Power Supply board PV Enable board PV Motion Controller board PV Hand + Lateral board We also replaced the ribbon cable and lengthened the outer insulation. This has been an expensive and time consuming fault. A similar fault happened 20 miles down the road from us, when their ribbon cable got caught and shorted down to earth. So it may be worth checking or replacing your own ribbon cables. Regards Chris Coley (Technician) Essex County Hospital (UK) ------_=_NextPart_001_01C32163.66681C26 Content-Type: text/html; charset="iso-8859-1" Warning - Varian 2100 Users

A similar story:

During the original demo of a 2100 here, fireworks came from the inside of the console. Flashes and bangs, very exciting.

A new light control relay had shorted, coil to contacts, putting 277vac on the 24vdc line. All backplanes, RF driver, many pcbs, etc. were zapped. We now use an extra isolation relay in those circuits, and do not allow any equivalent relays, only the specified one. Varian got the machine working again in an amazingly short time. The expense was large, the lawsuits tedious. Although an ac relay had accidentally been used in place of a dc by a contractor, no relay should ever short this way under any circumstances, in my opinion.

Jerry

-----Original Message-----
From: Coley Chris (RDE) Essex Rivers [mailto:Chris.Coley@essexrivers.nhs.uk]
Sent: Wednesday, May 21, 2003 6:29 AM
To: linac-eng@plato.aristotle.net
Subject: Warning - Varian 2100 Users

Dear All

Just a word of warning to other Varian 2100 users which may save a lot of money and time. Whilst servicing, I had taken off the interface mount, rotated it 180 degrees and rested it on top of the gantry (On a cushion). About a minute later I smelt smoke and saw some black smuts rising above the Stand. So I hit the emergency off button. What had happened was the 34 way ribbon cable from the interface mount had shorted to the ring of lead around the collimator. There was a very small hole in the insulation of the ribbon cable on the +24v reset line. The cause of the insulation loss is probably down to us, as I don't disconnect the ribbon cable when removing the interface mount. The cable is a bit stretched when the interface mount is lying on the gantry.

The fault caused severe damage to the machine as I think we drew lots of current from the 24 v PSU and this caused the tracks to heat up on the Stand Motherboard. Then I think 110v AC flashed over to the +24v tracks. The Motherboard had quite a large area that had turned to carbon.

The boards that where replaced or repaired are listed below.

Stand Motherboard.
All four of the PWM boards
Carrousel Mode and BMAG board
CRADC board
Output Interface board
1 Pendant
PV Power Supply board
PV Enable board
PV Motion Controller board
PV Hand + Lateral board

We also replaced the ribbon cable and lengthened the outer insulation.

This has been an expensive and time consuming fault. A similar fault happened 20 miles down the road from us, when their ribbon cable got caught and shorted down to earth. So it may be worth checking or replacing your own ribbon cables.

Regards

Chris Coley (Technician)

Essex County Hospital (UK)

------_=_NextPart_001_01C32163.66681C26-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Sat May 24 03:01:36 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19JNPj-0002OK-00; Sat, 24 May 2003 03:01:35 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id A3BC1112D62; Sat, 24 May 2003 03:00:15 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id TAA20490 for linac-eng-list; Fri, 23 May 2003 19:26:53 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from barry.mail.mindspring.net (barry.mail.mindspring.net [207.69.200.25]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id TAA20486 for ; Fri, 23 May 2003 19:26:51 -0500 (CDT) Received: from pmnort1-126.rconnect.com ([209.163.34.126] helo=toshibauser) by barry.mail.mindspring.net with smtp (Exim 3.33 #1) id 19JMs4-0005xn-00; Fri, 23 May 2003 20:26:49 -0400 From: "Paul Miller" To: "Maddox, Buford J" , Subject: RE: Warning - Varian 2100 Users Date: Fri, 23 May 2003 19:26:37 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001C_01C32161.3A80A6C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2727.1300 Importance: Normal In-Reply-To: <36298D09ED1AD311B4DC0008C7F4D4E10A30F1C1@phsexch6.partners.org> Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Paul Miller" To: "Maddox, Buford J" , Subject: RE: Warning - Varian 2100 Users Date: Fri, 23 May 2003 19:26:37 -0500 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2727.1300 Importance: Normal In-Reply-To: <36298D09ED1AD311B4DC0008C7F4D4E10A30F1C1@phsexch6.partners.org> Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_001C_01C32161.3A80A6C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Warning - Varian 2100 UsersHad the same thing happen to one of our 2100's the electrician mis-wired the relay -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Maddox, Buford J Sent: Friday, May 23, 2003 2:42 PM To: 'Coley Chris (RDE) Essex Rivers'; linac-eng@plato.aristotle.net Subject: RE: Warning - Varian 2100 Users A similar story: During the original demo of a 2100 here, fireworks came from the inside of the console. Flashes and bangs, very exciting. A new light control relay had shorted, coil to contacts, putting 277vac on the 24vdc line. All backplanes, RF driver, many pcbs, etc. were zapped. We now use an extra isolation relay in those circuits, and do not allow any equivalent relays, only the specified one. Varian got the machine working again in an amazingly short time. The expense was large, the lawsuits tedious. Although an ac relay had accidentally been used in place of a dc by a contractor, no relay should ever short this way under any circumstances, in my opinion. Jerry -----Original Message----- From: Coley Chris (RDE) Essex Rivers [mailto:Chris.Coley@essexrivers.nhs.uk] Sent: Wednesday, May 21, 2003 6:29 AM To: linac-eng@plato.aristotle.net Subject: Warning - Varian 2100 Users Dear All Just a word of warning to other Varian 2100 users which may save a lot of money and time. Whilst servicing, I had taken off the interface mount, rotated it 180 degrees and rested it on top of the gantry (On a cushion). About a minute later I smelt smoke and saw some black smuts rising above the Stand. So I hit the emergency off button. What had happened was the 34 way ribbon cable from the interface mount had shorted to the ring of lead around the collimator. There was a very small hole in the insulation of the ribbon cable on the +24v reset line. The cause of the insulation loss is probably down to us, as I don't disconnect the ribbon cable when removing the interface mount. The cable is a bit stretched when the interface mount is lying on the gantry. The fault caused severe damage to the machine as I think we drew lots of current from the 24 v PSU and this caused the tracks to heat up on the Stand Motherboard. Then I think 110v AC flashed over to the +24v tracks. The Motherboard had quite a large area that had turned to carbon. The boards that where replaced or repaired are listed below. Stand Motherboard. All four of the PWM boards Carrousel Mode and BMAG board CRADC board Output Interface board 1 Pendant PV Power Supply board PV Enable board PV Motion Controller board PV Hand + Lateral board We also replaced the ribbon cable and lengthened the outer insulation. This has been an expensive and time consuming fault. A similar fault happened 20 miles down the road from us, when their ribbon cable got caught and shorted down to earth. So it may be worth checking or replacing your own ribbon cables. Regards Chris Coley (Technician) Essex County Hospital (UK) ------=_NextPart_000_001C_01C32161.3A80A6C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Warning - Varian 2100 Users

Had=20 the same thing happen to one of our 2100's the electrician mis-wired the = relay

-----Original Message-----
From:=20 owner-linac-eng@plato.aristotle.net=20 [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of = Maddox, Buford=20 J
Sent: Friday, May 23, 2003 2:42 PM
To: 'Coley = Chris=20 (RDE) Essex Rivers'; linac-eng@plato.aristotle.net
Subject: = RE:=20 Warning - Varian 2100 Users

A=20 similar story:

During the original demo of a 2100 here, fireworks came from = the inside=20 of the console. Flashes and bangs, very exciting.

A new light control relay had shorted, coil to = contacts,=20 putting 277vac on the 24vdc line. All backplanes, RF driver, = many pcbs,=20 etc. were zapped. We now use an extra isolation relay in those = circuits,=20 and do not allow any equivalent relays, only the specified=20 one. Varian got the machine working again in an amazingly = short=20 time. The expense was large, the lawsuits tedious. =20 Although an ac relay had accidentally been used in place of a dc = by a=20 contractor, no relay should ever short this way under any = circumstances,=20 in my opinion.

Jerry

-----Original=20 Message-----
From: Coley Chris (RDE) Essex Rivers=20 [mailto:Chris.Coley@essexrivers.nhs.uk]
Sent: Wednesday, May = 21,=20 2003 6:29 AM
To: = linac-eng@plato.aristotle.net
Subject:=20 Warning - Varian 2100 Users

Dear All

Just a word of warning to other = Varian 2100=20 users which may save a lot of money and time. Whilst = servicing, I had=20 taken off the interface mount, rotated it 180 degrees and rested it = on top=20 of the gantry (On a cushion). About a minute later I smelt = smoke and=20 saw some black smuts rising above the Stand. So I hit the = emergency=20 off button. What had happened was the 34 way ribbon cable from = the=20 interface mount had shorted to the ring of lead around the = collimator. =20 There was a very small hole in the insulation of the ribbon cable on = the=20 +24v reset line. The cause of the insulation loss is probably = down to=20 us, as I don't disconnect the ribbon cable when removing the = interface=20 mount. The cable is a bit stretched when the interface mount is = lying on the=20 gantry.

The fault caused severe damage to = the=20 machine as I think we drew lots of current from the 24 v PSU and = this caused=20 the tracks to heat up on the Stand Motherboard. Then I think = 110v AC=20 flashed over to the +24v tracks. The Motherboard had quite a = large=20 area that had turned to carbon.

The boards that where replaced or = repaired=20 are listed below.

Stand Motherboard. =
All four of the PWM boards
Carrousel Mode and BMAG board =
CRADC board
Output Interface board
1 Pendant
PV=20 Power Supply board
PV = Enable=20 board
PV Motion Controller = board
PV Hand + Lateral = board=20

We also replaced the ribbon cable = and=20 lengthened the outer insulation.

This has been an expensive and = time=20 consuming fault. A similar fault happened 20 miles down the = road from=20 us, when their ribbon cable got caught and shorted down to = earth. So=20 it may be worth checking or replacing your own ribbon = cables.

Regards

Chris Coley (Technician)

Essex County Hospital (UK)=20

------=_NextPart_000_001C_01C32161.3A80A6C0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 26 07:46:17 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KAoL-0007pq-00; Mon, 26 May 2003 07:46:17 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 359A91112FA; Mon, 26 May 2003 07:44:48 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id AAA24796 for linac-eng-list; Mon, 26 May 2003 00:11:01 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from lisa.cityu.edu.hk (lisa.cityu.edu.hk [144.214.5.205]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id AAA24792 for ; Mon, 26 May 2003 00:10:59 -0500 (CDT) Received: from conversion-daemon.alumni.cityu.edu.hk by alumni.cityu.edu.hk (iPlanet Messaging Server 5.1 HotFix 1.12 (built Mar 11 2003)) id <0HFH002017NFRT@alumni.cityu.edu.hk> for linac-eng@plato.aristotle.net; Mon, 26 May 2003 13:10:15 +0800 (CST) Received: from alumni.cityu.edu.hk (ppp221136.cityu.edu.hk [144.214.221.136]) by alumni.cityu.edu.hk (iPlanet Messaging Server 5.1 HotFix 1.12 (built Mar 11 2003)) with ESMTP id <0HFH00BJNAAJ69@alumni.cityu.edu.hk>; Mon, 26 May 2003 13:08:45 +0800 (CST) Date: Thu, 22 May 2003 09:33:46 +0800 From: Jonathan Chan Subject: Re: Warning - Varian 2100 Users To: "Coley Chris (RDE) Essex Rivers" Cc: linac-eng@plato.aristotle.net Message-id: <3ECC28FA.6020805@alumni.cityu.edu.hk> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=us-ascii Content-transfer-encoding: 7BIT X-Accept-Language: en-us, en, zh-hk, zh-tw, zh-cn User-Agent: Mozilla/5.0 (Windows; U; Win95; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 References: <37B4C3952191274895976CE20DF5821D01E82EF0@nemail.essa.nhs.uk> Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 22 May 2003 09:33:46 +0800 From: Jonathan Chan Subject: Re: Warning - Varian 2100 Users To: "Coley Chris (RDE) Essex Rivers" Cc: linac-eng@plato.aristotle.net X-Accept-Language: en-us, en, zh-hk, zh-tw, zh-cn Sender: owner-linac-eng@plato.aristotle.net Yes, pretty expensive repair. Same warming to all Varian C3 users, whether Lo-E or Hi-E. The back-connected stand motherboard is always the first one to smoke (very bad news indeed). Jonathan Chan Queen Mary Hospital HONG KONG Coley Chris (RDE) Essex Rivers wrote: > Dear All > > Just a word of warning to other Varian 2100 users which may save a lot > of money and time. Whilst servicing, I had taken off the interface > mount, rotated it 180 degrees and rested it on top of the gantry (On a > cushion). About a minute later I smelt smoke and saw some black smuts > rising above the Stand. So I hit the emergency off button. What had > happened was the 34 way ribbon cable from the interface mount had > shorted to the ring of lead around the collimator. There was a very > small hole in the insulation of the ribbon cable on the +24v reset > line. The cause of the insulation loss is probably down to us, as I > don't disconnect the ribbon cable when removing the interface mount. The > cable is a bit stretched when the interface mount is lying on the gantry. > > The fault caused severe damage to the machine as I think we drew lots of > current from the 24 v PSU and this caused the tracks to heat up on the > Stand Motherboard. Then I think 110v AC flashed over to the +24v > tracks. The Motherboard had quite a large area that had turned to carbon. > > The boards that where replaced or repaired are listed below. > > Stand Motherboard. > All four of the PWM boards > Carrousel Mode and BMAG board > CRADC board > Output Interface board > 1 Pendant > PV Power Supply board > PV Enable board > PV Motion Controller board > PV Hand + Lateral board > > We also replaced the ribbon cable and lengthened the outer insulation. > > This has been an expensive and time consuming fault. A similar fault > happened 20 miles down the road from us, when their ribbon cable got > caught and shorted down to earth. So it may be worth checking or > replacing your own ribbon cables. > > Regards > > Chris Coley (Technician) > > Essex County Hospital (UK) > 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 26 10:10:16 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KD3f-0001uq-00; Mon, 26 May 2003 10:10:15 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id AECB91112F1; Mon, 26 May 2003 10:08:47 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id CAA26766 for linac-eng-list; Mon, 26 May 2003 02:50:19 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from zw_ntserver_1.walcheren.ziekenhuis.nl ([212.115.200.190]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id CAA26762 for ; Mon, 26 May 2003 02:50:18 -0500 (CDT) From: CJ.de.Bruijne@walcheren.ziekenhuis.nl Received: by ZW_NTSRV1-0 with Internet Mail Service (5.5.2653.19) id ; Mon, 26 May 2003 09:50:13 +0200 Message-ID: To: linac-eng@plato.aristotle.net Subject: HWFA pro's Date: Mon, 26 May 2003 09:50:12 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: CJ.de.Bruijne@walcheren.ziekenhuis.nl To: linac-eng@plato.aristotle.net Subject: HWFA pro's Date: Mon, 26 May 2003 09:50:12 +0200 Sender: owner-linac-eng@plato.aristotle.net Hi folks, We have an intermittent, selfclearing fault at a Cl.2300 C3 machine. The eventlog says: 'HWFA pro/spro/refchannel Err 06 - CLIP' We dont have any idea. Do you? TIA Keesjan de Bruijne Biomedical Engineer Ziekenhuis Walcheren Vlissingen, the Netherlands dep. DIA cj.de.bruijne@walcheren.ziekenhuis.nl 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 26 11:01:19 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KDr5-00035z-00; Mon, 26 May 2003 11:01:19 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 727891112F1; Mon, 26 May 2003 10:59:48 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id DAA28463 for linac-eng-list; Mon, 26 May 2003 03:43:57 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from web41007.mail.yahoo.com (web41007.mail.yahoo.com [66.218.93.6]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id DAA28459 for ; Mon, 26 May 2003 03:43:55 -0500 (CDT) Message-ID: <20030526084324.37541.qmail@web41007.mail.yahoo.com> Received: from [192.169.39.69] by web41007.mail.yahoo.com via HTTP; Mon, 26 May 2003 01:43:24 PDT Date: Mon, 26 May 2003 01:43:24 -0700 (PDT) From: vichael landicho Subject: touchguard To: linac-eng@plato.aristotle.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1077400276-1053938604=:36290" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Mon, 26 May 2003 01:43:24 -0700 (PDT) From: vichael landicho Subject: touchguard To: linac-eng@plato.aristotle.net Sender: owner-linac-eng@plato.aristotle.net --0-1077400276-1053938604=:36290 Content-Type: text/plain; charset=us-ascii Dear listers, My Elekta-Precise doesn't ceased to move as I rotate the (gantry) even if the touchguard is activated. I say touchguard is activated (by simulation) cause the screen show it as an inhibit. Might be having a loss of com'n somewhere. Does anybody come across with this? Thanks in advance, Bong FMEI-Philippines --------------------------------- Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. --0-1077400276-1053938604=:36290 Content-Type: text/html; charset=us-ascii

Dear listers,

My Elekta-Precise doesn't ceased to move as I rotate the (gantry) even if the touchguard is activated. I say touchguard is activated (by simulation) cause the screen show it as an inhibit. Might be having a loss of com'n somewhere. Does anybody come across with this?

Thanks in advance,

Bong

FMEI-Philippines

Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo. --0-1077400276-1053938604=:36290-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 26 15:07:19 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KHh9-0007UN-00; Mon, 26 May 2003 15:07:19 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 6D01F1112F1; Mon, 26 May 2003 15:05:49 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA01511 for linac-eng-list; Mon, 26 May 2003 07:42:44 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from imsmq05.netvigator.com (imsmq05.netvigator.com [218.102.48.41]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id HAA01504 for ; Mon, 26 May 2003 07:42:30 -0500 (CDT) Received: (qmail 24505 invoked from network); 26 May 2003 12:42:10 -0000 Received: from pcd337088.netvigator.com (HELO kyeung) (203.218.127.88) by imsmq05.netvigator.com with SMTP; 26 May 2003 12:42:10 -0000 Message-ID: <000801c32384$37448b00$804bfea9@kyeung> From: "kim yeung" To: "linac-eng" Subject: Re: Looking for Couch in-out motor Date: Mon, 26 May 2003 20:42:06 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01C323C7.45357060" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "kim yeung" To: "linac-eng" Subject: Re: Looking for Couch in-out motor Date: Mon, 26 May 2003 20:42:06 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C323C7.45357060 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Colleagues, Varian linac We are looking for the second source of Varian's couch in-out motor for = replacement. The motor was made by ASR Servotron.=20 Could anyone advise the web site of ASR Servotron?=20 Best regards, Kim Yeung ------=_NextPart_000_0005_01C323C7.45357060 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Colleagues,

= Varian=20 linac

We are looking for the second = source of=20 Varian's couch in-out motor for replacement. The motor = was made by ASR=20 Servotron.

Could anyone advise the web site = of ASR=20 Servotron?

Best regards,

Kim Yeung

------=_NextPart_000_0005_01C323C7.45357060-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Mon May 26 16:23:56 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KItI-00008P-00; Mon, 26 May 2003 16:23:56 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 423381112F1; Mon, 26 May 2003 16:22:27 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA03384 for linac-eng-list; Mon, 26 May 2003 09:07:44 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from titan.lhsc.on.ca (titan.lhsc.on.ca [142.158.2.20]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA03380 for ; Mon, 26 May 2003 09:07:43 -0500 (CDT) From: Randy.McVittie@lrcc.on.ca Received: from mail.lrcc.on.ca (mail.lrcc.on.ca [142.158.120.242]) by titan.lhsc.on.ca (8.11.6+Sun/8.11.6) with SMTP id h4QE7AC27591; Mon, 26 May 2003 10:07:11 -0400 (EDT) Received: by mail.lrcc.on.ca(Lotus SMTP MTA v4.6.7 (934.1 12-30-1999)) id 85256D32.004D1781 ; Mon, 26 May 2003 10:02:02 -0400 X-Lotus-FromDomain: LRCC To: CJ.de.Bruijne@walcheren.ziekenhuis.nl Cc: linac-eng@plato.aristotle.net Message-ID: <85256D32.004D16CE.00@mail.lrcc.on.ca> Date: Mon, 26 May 2003 10:02:00 -0400 Subject: Re: HWFA pro's Mime-Version: 1.0 Content-type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Randy.McVittie@lrcc.on.ca X-Lotus-FromDomain: LRCC To: CJ.de.Bruijne@walcheren.ziekenhuis.nl Cc: linac-eng@plato.aristotle.net Date: Mon, 26 May 2003 10:02:00 -0400 Subject: Re: HWFA pro's Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net I looked in my manual here and I didn't see any mention of an error message like that. My manual is only shows messages for version 2, 3, 4, 5.2 and 5.4. Are you running version 6 software by any chance? Randy McVittie London Regional Cancer Centre London, Ontario Canada 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 27 10:14:29 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KZbJ-0005Rz-00; Tue, 27 May 2003 10:14:29 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 2710C1112F1; Tue, 27 May 2003 10:12:55 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id CAA16152 for linac-eng-list; Tue, 27 May 2003 02:44:17 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from pebble.orebroll.se (pebble.orebroll.se [194.103.185.215]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id CAA16148 for ; Tue, 27 May 2003 02:44:15 -0500 (CDT) From: terry.kearey@orebroll.se Received: from [192.168.250.102] by [192.168.250.24] with TFS Secure Messaging; Tue, 27 May 2003 9:43:41 +0200 Received: by exchange-1.orebroll.se with Internet Mail Service (5.5.2653.19) id ; Tue, 27 May 2003 09:43:41 +0200 Message-ID: <735AFCF366C6D211B1FF00A0C9EA2A4D06267012@exchange-5.orebroll.se> To: kimyeung@netvigator.com, linac-eng@plato.aristotle.net Subject: RE: Looking for Couch in-out motor Date: Tue, 27 May 2003 09:43:39 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C32423.B066D390" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: terry.kearey@orebroll.se To: kimyeung@netvigator.com, linac-eng@plato.aristotle.net Subject: RE: Looking for Couch in-out motor Date: Tue, 27 May 2003 09:43:39 +0200 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C32423.B066D390 Content-Type: text/plain A Google search on 'ASR Servotron' turns up 5 pages of references. Choose one which suits your location best. Tel. -----Original Message----- From: kim yeung [mailto:kimyeung@netvigator.com] Sent: den 26 maj 2003 14:42 To: linac-eng Subject: Re: Looking for Couch in-out motor Hi Colleagues, Varian linac We are looking for the second source of Varian's couch in-out motor for replacement. The motor was made by ASR Servotron. Could anyone advise the web site of ASR Servotron? Best regards, Kim Yeung ------_=_NextPart_001_01C32423.B066D390 Content-Type: text/html Message

A Google search on 'ASR Servotron' turns up 5 pages of references. Choose one which suits your location best.

Tel.

-----Original Message-----
From: kim yeung [mailto:kimyeung@netvigator.com]
Sent: den 26 maj 2003 14:42
To: linac-eng
Subject: Re: Looking for Couch in-out motor

Hi Colleagues,

Varian linac

We are looking for the second source of Varian's couch in-out motor for replacement. The motor was made by ASR Servotron.

Could anyone advise the web site of ASR Servotron?

Best regards,

Kim Yeung

------_=_NextPart_001_01C32423.B066D390-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 27 15:34:21 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Kear-0001Lw-00; Tue, 27 May 2003 15:34:21 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id DB3331112F2; Tue, 27 May 2003 15:32:45 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA19935 for linac-eng-list; Tue, 27 May 2003 08:15:16 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from PHSEXCHICI.MGH.HARVARD.EDU (phsexchici.mgh.harvard.edu [132.183.126.51]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA19929 for ; Tue, 27 May 2003 08:15:14 -0500 (CDT) Received: by phsexchici.mgh.harvard.edu with Internet Mail Service (5.5.2655.55) id ; Tue, 27 May 2003 09:14:43 -0400 Message-ID: <36298D09ED1AD311B4DC0008C7F4D4E10A30F1C2@phsexch6.partners.org> From: "Maddox, Buford J" To: "'CJ.de.Bruijne@walcheren.ziekenhuis.nl'" , linac-eng@plato.aristotle.net Subject: RE: HWFA pro's Date: Tue, 27 May 2003 09:14:25 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Maddox, Buford J" To: "'CJ.de.Bruijne@walcheren.ziekenhuis.nl'" , linac-eng@plato.aristotle.net Subject: RE: HWFA pro's Date: Tue, 27 May 2003 09:14:25 -0400 Sender: owner-linac-eng@plato.aristotle.net I have never seen this message on my ver 6 machine. But I think the refchannel part of the message means the voltage going to all the pots is bad, either at the collimator or couch. Perhaps CLIP could mean coll inplane? Or couch -----? I have seen several cases of this when wires were broken or shorting in couch cables, gantry cables, collimator pinched cables. I think you will have to look at it, without disturbing or moving anything, when it happens. It is very hard to convince the therapists of this, until you point out that it will continue if you don't get to see it. Unfortunately, even getting the patient off may clear it. TX for all your posts. Jerry -----Original Message----- From: CJ.de.Bruijne@walcheren.ziekenhuis.nl [mailto:CJ.de.Bruijne@walcheren.ziekenhuis.nl] Sent: Monday, May 26, 2003 3:50 AM To: linac-eng@plato.aristotle.net Subject: HWFA pro's Hi folks, We have an intermittent, selfclearing fault at a Cl.2300 C3 machine. The eventlog says: 'HWFA pro/spro/refchannel Err 06 - CLIP' We dont have any idea. Do you? TIA Keesjan de Bruijne Biomedical Engineer Ziekenhuis Walcheren Vlissingen, the Netherlands dep. DIA cj.de.bruijne@walcheren.ziekenhuis.nl 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 27 20:24:44 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Kj7s-0003hT-00; Tue, 27 May 2003 20:24:44 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8C25A1112F7; Tue, 27 May 2003 20:23:07 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id MAA25214 for linac-eng-list; Tue, 27 May 2003 12:48:36 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from orcus.cancerboard.ab.ca (cancerserver.cancerboard.ab.ca [164.102.1.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id MAA25210 for ; Tue, 27 May 2003 12:48:34 -0500 (CDT) Received: from icelus.cancerboard.ab.ca (tbccmail.cancerboard.ab.ca [164.102.20.50]) by orcus.cancerboard.ab.ca (8.11.6+Sun/8.10.2) with ESMTP id h4RHnwb16410; Tue, 27 May 2003 11:50:03 -0600 (MDT) Received: from cancerboard.ab.ca ([164.102.23.2]) by icelus.cancerboard.ab.ca (Switch-2.2.1/Switch-2.2.0) with ESMTP id h4RHmYl15277; Tue, 27 May 2003 11:48:34 -0600 (MDT) Message-ID: <3ED3A4C1.81222984@cancerboard.ab.ca> Date: Tue, 27 May 2003 11:47:45 -0600 From: Kurt Knibutat Organization: Tom Baker Cancer Centre X-Mailer: Mozilla 4.79 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: CJ.de.Bruijne@walcheren.ziekenhuis.nl Cc: linac-eng@plato.aristotle.net Subject: Re: HWFA pro's References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Tue, 27 May 2003 11:47:45 -0600 From: Kurt Knibutat Organization: Tom Baker Cancer Centre X-Accept-Language: en To: CJ.de.Bruijne@walcheren.ziekenhuis.nl Cc: linac-eng@plato.aristotle.net Subject: Re: HWFA pro's Sender: owner-linac-eng@plato.aristotle.net I love it when this list starts seeing a problem and then we have it too. Your 'HWFA pro/spro/refchannel Err 06 - CLIP' is a couch vertical PRO readout problem (in Varspeak Couch LIft Pro or CLIP). The controller checks that a readout always falls within the range of the +10 and -10 ref supplies. You probably have either an intermittent wiper or bad cable. Also check that when the couch is at the limits that it is below but not equal to the ref value. In our case we are chasing a CLOP or Couch LOng Pro error. -- Kurt Knibutat Sr Technical Equipment Officer Tom Baker Cancer Centre (403) 944-1089 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Tue May 27 21:31:55 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KkAt-0003po-00; Tue, 27 May 2003 21:31:55 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id B5CFC1112FA; Tue, 27 May 2003 21:30:18 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA26929 for linac-eng-list; Tue, 27 May 2003 14:04:25 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from scf.sk.ca (shin.communitynet.ca [216.174.136.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA26925 for ; Tue, 27 May 2003 14:04:22 -0500 (CDT) Received: from neried.scf.sk.ca (unverified [172.24.48.3]) by scf.sk.ca (Rockliffe SMTPRA 5.2.4) with SMTP id for ; Tue, 27 May 2003 13:04:20 -0600 Received: (from spc160 [172.24.56.160]) by neried.scf.sk.ca (NAVGW 2.5.2.21) with SMTP id M2003052713051523514 ; Tue, 27 May 2003 13:05:15 -0600 From: "Brian Martin" To: "'Kurt Knibutat'" , "Linac Engineer group (E-mail)" Subject: RE: HWFA pro's Date: Tue, 27 May 2003 13:04:25 -0600 Message-ID: <000501c32482$caf15d70$a03818ac@scadomain.local> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-Reply-To: <3ED3A4C1.81222984@cancerboard.ab.ca> Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id OAA26926 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Brian Martin" To: "'Kurt Knibutat'" , "Linac Engineer group (E-mail)" Subject: RE: HWFA pro's Date: Tue, 27 May 2003 13:04:25 -0600 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-Reply-To: <3ED3A4C1.81222984@cancerboard.ab.ca> X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id OAA26926 Sender: owner-linac-eng@plato.aristotle.net Does this mean if you have a Couch LAteral Pro error your couch has the CLAP? Brian Martin Medical Physics/Radiation Therapy Department Saskatoon Cancer Centre -----Original Message----- From: owner-linac-eng@plato.aristotle.net [mailto:owner-linac-eng@plato.aristotle.net]On Behalf Of Kurt Knibutat Sent: May 27, 2003 11:48 AM To: CJ.de.Bruijne@walcheren.ziekenhuis.nl Cc: linac-eng@plato.aristotle.net Subject: Re: HWFA pro's I love it when this list starts seeing a problem and then we have it too. Your 'HWFA pro/spro/refchannel Err 06 - CLIP' is a couch vertical PRO readout problem (in Varspeak Couch LIft Pro or CLIP). The controller checks that a readout always falls within the range of the +10 and -10 ref supplies. You probably have either an intermittent wiper or bad cable. Also check that when the couch is at the limits that it is below but not equal to the ref value. In our case we are chasing a CLOP or Couch LOng Pro error. -- Kurt Knibutat Sr Technical Equipment Officer Tom Baker Cancer Centre (403) 944-1089 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 28 00:05:24 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KmZQ-00041d-00; Wed, 28 May 2003 00:05:24 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id E97451112FB; Wed, 28 May 2003 00:03:44 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id PAA28745 for linac-eng-list; Tue, 27 May 2003 15:29:04 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dalwhinnie.chhlth.govt.nz ([203.163.70.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id PAA28729 for ; Tue, 27 May 2003 15:28:47 -0500 (CDT) Received: from mailsweeper2.chhlth.govt.nz (mailsweeper2.chhlth.govt.nz [159.117.18.162]) by dalwhinnie.chhlth.govt.nz (8.12.8/8.12.5) with ESMTP id h4RKSgbR028763 for ; Wed, 28 May 2003 08:28:42 +1200 Received: from SMTPGATE.CHHLTH.GOVT.NZ (unverified) by mailsweeper2.chhlth.govt.nz (Content Technologies SMTPRS 4.3.1) with ESMTP id for ; Mon, 26 May 2003 20:29:28 +1200 Received: from CHCH2-MTA by SMTPGATE.CHHLTH.GOVT.NZ with Novell_GroupWise; Wed, 28 May 2003 08:27:57 +1200 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Wed, 28 May 2003 08:27:43 +1200 From: "Dave Pinchin" To: , Subject: Re: HWFA pro's Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 28 May 2003 08:27:43 +1200 From: "Dave Pinchin" To: , Subject: Re: HWFA pro's Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net G'day, I always thought that clip clop went out with the advent of Mr. Watt's reciprocating steam engine. 'V' had better be careful or our future may include............. Gant ROt Pos Encoder..... Col Rot Aux Pro...... :) >>> Kurt Knibutat 28/05/03 05:47:45 >>> I love it when this list starts seeing a problem and then we have it too. Your 'HWFA pro/spro/refchannel Err 06 - CLIP' is a couch vertical PRO readout problem (in Varspeak Couch LIft Pro or CLIP). The controller checks that a readout always falls within the range of the +10 and -10 ref supplies. You probably have either an intermittent wiper or bad cable. Also check that when the couch is at the limits that it is below but not equal to the ref value. In our case we are chasing a CLOP or Couch LOng Pro error. -- Kurt Knibutat Sr Technical Equipment Officer Tom Baker Cancer Centre (403) 944-1089 ********************************************************************** ** This email and attachments have been scanned for content and viruses and is believed to be clean ** This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board ********************************************************************** 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 28 00:31:12 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19KmyO-00043B-00; Wed, 28 May 2003 00:31:12 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 5E3FB1112FB; Wed, 28 May 2003 00:29:36 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id QAA02080 for linac-eng-list; Tue, 27 May 2003 16:55:10 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from MCC2500.aollc.com (mail.aollc.com [216.77.56.193]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id QAA02076 for ; Tue, 27 May 2003 16:55:08 -0500 (CDT) From: mskowronski@aollc.com Received: by MCC2500.aollc.com with Internet Mail Service (5.5.2656.59) id ; Tue, 27 May 2003 16:53:24 -0500 Message-ID: <57ED46397CECE448AA095889F8DB186C9BEF03@MCC2500.aollc.com> To: linac-eng@plato.aristotle.net Subject: Accelerator Software License Fee Date: Tue, 27 May 2003 16:53:24 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2656.59) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: mskowronski@aollc.com To: linac-eng@plato.aristotle.net Subject: Accelerator Software License Fee Date: Tue, 27 May 2003 16:53:24 -0500 Sender: owner-linac-eng@plato.aristotle.net We recently purchased a used computerized accelerator (Varian 2100C) for our satellite clinic. After the purchase of the Varian 2100C from MCP, I notified Varian of its new location. A representative of Varian informed me that the accelerator operates using computer software owned by Varian. Varian wants a registration and licensing fee for the software. A representative of MCP believes that the software fee is unwarranted because of a FDA ruling that the software is an integral part of the medical device and can not be separated out. Is this correct? What have others experienced? Michael G. Skowronski Montgomery Cancer Center Montgomery, Alabama 36106 (334) 273-7000 mskowronski@aollc.com The opinions expressed are herein my own. I am not an agent of my employer. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 28 15:01:55 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19L0Z1-0002Aj-00; Wed, 28 May 2003 15:01:55 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id D2FD81112F1; Wed, 28 May 2003 15:00:13 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA12181 for linac-eng-list; Wed, 28 May 2003 07:31:34 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail5.nhs.uk (mail5.nhs.uk [194.72.23.242]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA12177 for ; Wed, 28 May 2003 07:31:32 -0500 (CDT) Received: from hn-ext by mail5.nhs.uk (Sendmail 8.8.8) with esmtp id 19L057-00009I-00; Wed, 28 May 2003 13:31:01 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3EC8171B0016518D for linac-eng@plato.aristotle.net; Wed, 28 May 2003 13:31:01 +0100 Received: from mercury.University-b.wmids.nhs.uk (193.240.116.176) by relay.nhs.uk (Syntegra-1 7.0.008) (authenticated as smtp_uhb_nhs_uk@es2002.nhs.uk) id 3ED496DE00008EBC; Wed, 28 May 2003 13:31:01 +0100 Received: by MERCURY with Internet Mail Service (5.5.2653.19) id ; Wed, 28 May 2003 13:31:00 +0100 Message-ID: <71A7A8BA33E3D511AF5E00034797029B0588ED6D@HERMES> From: Graham Chalmers To: linac-eng@plato.aristotle.net, "'vichael landicho'" Subject: RE: touchguard Date: Wed, 28 May 2003 13:30:36 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C32514.F09DE880" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Graham Chalmers To: linac-eng@plato.aristotle.net, "'vichael landicho'" Subject: RE: touchguard Date: Wed, 28 May 2003 13:30:36 +0100 Sender: owner-linac-eng@plato.aristotle.net This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C32514.F09DE880 Content-Type: text/plain; charset="iso-8859-1" Dear Bong This does sound odd. I have not seen this but maybe you need to confirm the following That the touchguard contactor C isn't stuck in. Check with the machine powered right off. Otherwise:- When the touchguard is operated, you get a message but the gantry does not stop - looking at circuits from an older SL machine, the message would suggest that the 22V is being lost in the head i.e. the touchguard switches are working and this is seen by the DIE-RHA board. This loss of 22v should cause relay RL1 to drop out on an IRC-A card (PCB14A older SL system) - if it doesn't then Con C may stay permanently in. Another possible supply route would be if a touchguard override switch or its relay RL2 on IRC-C PCB74C was always made. I.e. the override circuit is always made so bypassing the RL1 contact as mentioned above so the circuit does not stop. Otherwise you may have to hunt backwards from the contactor to find why it is always supplied - are you sure no-one has been servicing the machine and left a link somewhere they shouldn't have? This circuit is largely hardware so wires and relay contacts Good luck Graham Chalmers -QEH Birmingham UK ---------- From: vichael landicho[SMTP:velandicho@yahoo.com] Sent: Monday, May 26, 2003 9:43 AM To: linac-eng@plato.aristotle.net Subject: touchguard Dear listers, My Elekta-Precise doesn't ceased to move as I rotate the (gantry) even if the touchguard is activated. I say touchguard is activated (by simulation) cause the screen show it as an inhibit. Might be having a loss of com'n somewhere. Does anybody come across with this? Thanks in advance, Bong FMEI-Philippines _____ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. DISCLAIMER: This e-mail contains proprietary information some or all of which may be confidential or legally privileged. It is for the exclusive use of the intended recipient(s) only. If an addressing or transmission error has misdirected this e-mail and you are not the intended recipient(s), please notify the author by replying to this e-mail. If you are not the intended recipient you must not use, disclose, distribute, copy, print, or rely on this e-mail, as this may be unlawful. ------_=_NextPart_001_01C32514.F09DE880 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable RE: touchguard

Dear Bong

This does sound odd. I have not seen = this but maybe you need to confirm the following

That the touchguard contactor C isn't = stuck in. Check with the machine powered right off. Otherwise:-

When the touchguard is operated, you = get a message but the gantry does not stop -

looking at circuits from an older SL = machine, the message would suggest that the 22V is being lost in the = head i.e. the touchguard switches are working and this is seen by the = DIE-RHA board.

This loss of 22v should cause relay = RL1 to drop out on an IRC-A card (PCB14A older SL system) - if it = doesn't then Con C may stay permanently in.

Another possible supply route would be = if a touchguard override switch or its relay RL2 on IRC-C PCB74C was = always made. I.e. the override circuit is always made so bypassing the = RL1 contact as mentioned above so the circuit does not stop.

Otherwise you may have to hunt = backwards from the contactor to find why it is always supplied - are = you sure no-one has been servicing the machine and left a link = somewhere they shouldn't have? This circuit is largely hardware so = wires and relay contacts

Good luck

Graham Chalmers -QEH Birmingham = UK

----------
From: vichael = landicho[SMTP:velandicho@yahoo.com]
Sent: Monday, May 26, 2003 9:43 = AM
To: = linac-eng@plato.aristotle.net
Subject: = touchguard

Dear listers,
=A0
=A0=A0=A0 My Elekta-Precise=A0 doesn't = ceased to move as I rotate the (gantry) even if the touchguard is = activated. I say touchguard is activated (by simulation) cause the = screen show it as an inhibit. Might be having a loss of com'n = somewhere. Does anybody=A0 come across with this?

=A0
Thanks in advance,
Bong
FMEI-Philippines=A0
=A0
=A0

=A0 _____ =A0

Do you Yahoo!?
The New Yahoo! = Search - Faster. Easier. Bingo.
DISCLAIMER: This e-mail contains = proprietary information some or all of which may be confidential or = legally privileged. It is for the exclusive use of the intended = recipient(s) only. If an addressing or transmission error has = misdirected this e-mail and you are not the intended recipient(s), = please notify the author by replying to this e-mail. If you are not the = intended recipient you must not use, disclose, distribute, copy, print, = or rely on this e-mail, as this may be unlawful.

------_=_NextPart_001_01C32514.F09DE880-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 28 15:28:10 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19L0yP-0002Ol-00; Wed, 28 May 2003 15:28:09 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id E3ECD1112F1 for ; Wed, 28 May 2003 15:26:30 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KWFHED0CFK8XH0DD@med.uu.nl> for kok@radth.med.uu.nl; Wed, 28 May 2003 15:24:21 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KWFHE9Q8108XR6MW@med.uu.nl> for kok@radth.med.uu.nl; Wed, 28 May 2003 15:24:16 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id GAA11251 for linac-eng-list; Wed, 28 May 2003 06:27:49 -0500 (CDT) Received: from mail8.nhs.uk (mail8.nhs.uk [213.120.235.86]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id GAA11247 for ; Wed, 28 May 2003 06:27:47 -0500 (CDT) Received: from [194.62.42.123] (helo=relayint2.nhs.uk) by mail8.nhs.uk with esmtp (Exim 4.10) id 19Kz5q-0003o5-00 for linac-eng@plato.aristotle.net; Wed, 28 May 2003 12:27:42 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B600EAF294 for linac-eng@plato.aristotle.net; Wed, 28 May 2003 12:27:42 +0100 Received: from esscdc3.essa.nhs.uk (194.189.136.242) by relay.nhs.uk (Syntegra-1 7.0.008) (authenticated as smtp_essa_nhs_uk@es2002.nhs.uk) id 3ED496DE00002C2A for linac-eng@plato.aristotle.net; Wed, 28 May 2003 12:27:42 +0100 Received: by smtp.chelmsford-pct.nhs.uk with Internet Mail Service (5.5.2653.19) id ; Wed, 28 May 2003 12:24:20 +0100 Date: Wed, 28 May 2003 12:23:52 +0100 From: "Coley Chris (RDE) Essex Rivers" Subject: Mevatron for sale Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net Cc: "Baker Tony (RDE) Essex Rivers" Message-id: <37B4C3952191274895976CE20DF5821D01E830EB@nemail.essa.nhs.uk> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_vtVSq07G1gAn02vWsm62eA)" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 28 May 2003 12:23:52 +0100 From: "Coley Chris (RDE) Essex Rivers" Subject: Mevatron for sale Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net Cc: "Baker Tony (RDE) Essex Rivers" X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --Boundary_(ID_vtVSq07G1gAn02vWsm62eA) Content-type: text/plain Dear All We have a working Siemens Mevatron 6740 that is due to be taken out of service. It is 15 years old and received a new waveguide two years ago. If anybody is interested in purchasing the whole machine or waveguide, could they contact Mr Tony Baker on 44 (0) 1206 744580 or email him at tony.baker@essexrivers.nhs.uk Many thanks Chris Coley (Technician) Essex County Hospital (UK) --Boundary_(ID_vtVSq07G1gAn02vWsm62eA) Content-type: text/html Content-transfer-encoding: quoted-printable Mevatron for sale

Dear All

We have a working Siemens Mevatron = 6740 that is due to be taken out of service. It is 15 years old = and received a new waveguide two years ago. If anybody is = interested in purchasing the whole machine or waveguide, could they = contact Mr Tony Baker on 44 (0) 1206 744580 or email him at = tony.baker@essexrivers.nhs.uk

Many thanks

Chris Coley (Technician)

Essex County Hospital (UK)

--Boundary_(ID_vtVSq07G1gAn02vWsm62eA)-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 28 15:56:32 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19L1Ps-00036y-00; Wed, 28 May 2003 15:56:32 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 9696F1112F1; Wed, 28 May 2003 15:54:52 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id IAA13350 for linac-eng-list; Wed, 28 May 2003 08:30:30 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from dangerfield.cancercare.mb.ca (dangerfield.cancercare.mb.ca [192.139.125.101]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id IAA13346 for ; Wed, 28 May 2003 08:30:28 -0500 (CDT) Received: (from uucp@localhost) by dangerfield.cancercare.mb.ca (8.11.6+Sun/8.11.6) id h4SDU3k05158 for ; Wed, 28 May 2003 08:30:03 -0500 (CDT) Received: from UNKNOWN(172.18.125.27), claiming to be "chaos.cancercare.mb.ca" via SMTP by dangerfield, id smtpdAAAc0aW4j; Wed May 28 13:27:02 2003 Received: from CCMD01-MTA by chaos.cancercare.mb.ca with Novell_GroupWise; Wed, 28 May 2003 08:27:03 -0500 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.3 Date: Wed, 28 May 2003 08:26:42 -0500 From: "Ken Allen" To: Subject: Siemens Pumpstand Heat Exchanger Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA13347 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Wed, 28 May 2003 08:26:42 -0500 From: "Ken Allen" To: Subject: Siemens Pumpstand Heat Exchanger Content-Disposition: inline X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id IAA13347 Sender: owner-linac-eng@plato.aristotle.net Hello List, We have a Mevatron Sn 3235 with the newer style pumpstand that is made by Lytron for Siemens. While changing the 3-way valve we noticed a small crack in what appears to be a silver soldered joint on the black foam covered heat exchanger. Early indications are that this part cannot be purchased separately. Has anyone ever come across a supplier of these (Lytron says they have an agreement with Siemens and can't do anything for me) or encountered this problem and came up with a solution? Thanks for your help. Ken Allen Nuclear Electronic Technologist CancerCare Manitoba Winnipeg, MB, Canada 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 28 17:06:14 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19L2VK-0004Xh-00; Wed, 28 May 2003 17:06:14 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id 925A91112F1 for ; Wed, 28 May 2003 17:04:35 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KWFKQXBDCG8XWAQR@med.uu.nl> for kok@radth.med.uu.nl; Wed, 28 May 2003 17:00:31 +0200 Received: from plato.aristotle.net ([206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KWFKMTGM8Y8XTDLK@med.uu.nl> for kok@radth.med.uu.nl; Wed, 28 May 2003 16:56:41 +0200 Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id HAA12181 for linac-eng-list; Wed, 28 May 2003 07:31:34 -0500 (CDT) Received: from mail5.nhs.uk (mail5.nhs.uk [194.72.23.242]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA12177 for ; Wed, 28 May 2003 07:31:32 -0500 (CDT) Received: from hn-ext by mail5.nhs.uk (Sendmail 8.8.8) with esmtp id 19L057-00009I-00; Wed, 28 May 2003 13:31:01 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint1.nhs.uk (Syntegra-I1 6.5.016) id 3EC8171B0016518D for linac-eng@plato.aristotle.net; Wed, 28 May 2003 13:31:01 +0100 Received: from mercury.University-b.wmids.nhs.uk (193.240.116.176) by relay.nhs.uk (Syntegra-1 7.0.008) (authenticated as smtp_uhb_nhs_uk@es2002.nhs.uk) id 3ED496DE00008EBC; Wed, 28 May 2003 13:31:01 +0100 Received: by MERCURY with Internet Mail Service (5.5.2653.19) id ; Wed, 28 May 2003 13:31:00 +0100 Date: Wed, 28 May 2003 13:30:36 +0100 From: Graham Chalmers Subject: RE: touchguard Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net, 'vichael landicho' Message-id: <71A7A8BA33E3D511AF5E00034797029B0588ED6D@HERMES> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: MULTIPART/ALTERNATIVE; BOUNDARY="Boundary_(ID_47Ecd6JckbwJKNEtwM5xSA)" Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Wed, 28 May 2003 13:30:36 +0100 From: Graham Chalmers Subject: RE: touchguard Sender: owner-linac-eng@plato.aristotle.net To: linac-eng@plato.aristotle.net, 'vichael landicho' X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --Boundary_(ID_47Ecd6JckbwJKNEtwM5xSA) Content-type: text/plain; charset="iso-8859-1" Dear Bong This does sound odd. I have not seen this but maybe you need to confirm the following That the touchguard contactor C isn't stuck in. Check with the machine powered right off. Otherwise:- When the touchguard is operated, you get a message but the gantry does not stop - looking at circuits from an older SL machine, the message would suggest that the 22V is being lost in the head i.e. the touchguard switches are working and this is seen by the DIE-RHA board. This loss of 22v should cause relay RL1 to drop out on an IRC-A card (PCB14A older SL system) - if it doesn't then Con C may stay permanently in. Another possible supply route would be if a touchguard override switch or its relay RL2 on IRC-C PCB74C was always made. I.e. the override circuit is always made so bypassing the RL1 contact as mentioned above so the circuit does not stop. Otherwise you may have to hunt backwards from the contactor to find why it is always supplied - are you sure no-one has been servicing the machine and left a link somewhere they shouldn't have? This circuit is largely hardware so wires and relay contacts Good luck Graham Chalmers -QEH Birmingham UK ---------- From: vichael landicho[SMTP:velandicho@yahoo.com] Sent: Monday, May 26, 2003 9:43 AM To: linac-eng@plato.aristotle.net Subject: touchguard Dear listers, My Elekta-Precise doesn't ceased to move as I rotate the (gantry) even if the touchguard is activated. I say touchguard is activated (by simulation) cause the screen show it as an inhibit. Might be having a loss of com'n somewhere. Does anybody come across with this? Thanks in advance, Bong FMEI-Philippines _____ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. DISCLAIMER: This e-mail contains proprietary information some or all of which may be confidential or legally privileged. It is for the exclusive use of the intended recipient(s) only. If an addressing or transmission error has misdirected this e-mail and you are not the intended recipient(s), please notify the author by replying to this e-mail. If you are not the intended recipient you must not use, disclose, distribute, copy, print, or rely on this e-mail, as this may be unlawful. --Boundary_(ID_47Ecd6JckbwJKNEtwM5xSA) Content-type: text/html; charset="iso-8859-1" Content-transfer-encoding: quoted-printable RE: touchguard

Dear Bong

This does sound odd. I have not seen = this but maybe you need to confirm the following

That the touchguard contactor C isn't = stuck in. Check with the machine powered right off. Otherwise:-

When the touchguard is operated, you = get a message but the gantry does not stop -

looking at circuits from an older SL = machine, the message would suggest that the 22V is being lost in the = head i.e. the touchguard switches are working and this is seen by the = DIE-RHA board.

This loss of 22v should cause relay = RL1 to drop out on an IRC-A card (PCB14A older SL system) - if it = doesn't then Con C may stay permanently in.

Good luck

Graham Chalmers -QEH Birmingham = UK

----------
From: vichael = landicho[SMTP:velandicho@yahoo.com]
Sent: Monday, May 26, 2003 9:43 = AM
To: = linac-eng@plato.aristotle.net
Subject: = touchguard

=A0
Thanks in advance,
Bong
FMEI-Philippines=A0
=A0
=A0

--Boundary_(ID_47Ecd6JckbwJKNEtwM5xSA)-- 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Wed May 28 22:06:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19L7C9-0005Hz-00; Wed, 28 May 2003 22:06:45 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 98E6E1112F1; Wed, 28 May 2003 22:05:03 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA20789 for linac-eng-list; Wed, 28 May 2003 14:22:54 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from nasvir01.nas.medcity.net (mail.nas.medcity.net [199.91.33.30]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id OAA20785 for ; Wed, 28 May 2003 14:22:51 -0500 (CDT) Received: from 159.139.152.113 by nasvir01.nas.medcity.net (InterScan E-Mail VirusWall NT); Wed, 28 May 2003 14:22:34 -0500 Received: by smtp-gw.nas.medcity.net with Internet Mail Service (5.5.2655.55) id ; Wed, 28 May 2003 14:17:59 -0500 Message-ID: <39A90AC123CB9D428821E2BC273E73CD01F86679@ftwex03.ftw.medcity.net> From: Tirabassi Michael To: "Linac list (E-mail)" Subject: Exact Couch Lift brake Date: Wed, 28 May 2003 14:21:36 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Tirabassi Michael To: "Linac list (E-mail)" Subject: Exact Couch Lift brake Date: Wed, 28 May 2003 14:21:36 -0500 Sender: owner-linac-eng@plato.aristotle.net Hello to all, I have an interesting situation with our 21EX #1485 exact couch. It seems that when any couch function is initiated the lift brake is released and the couch vertical will creep downwards ever so slowly. It is most noticeable when rotating the couch from 90 to 270. We are talking about a half a cm drop. With lateral or longitudinal movement you need to move back and forth several times to notice it. Obviously when couch vertical is actuated the brake is released but I wouldn't think it would be released for the other functions. I can watch DS16 on stand BCM light up with any couch function. BCM seems to be configured correctly. Anybody seen this or maybe check your machine for similar problem. Thanks, Mike T. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 29 15:27:13 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19LNR3-0006eO-00; Thu, 29 May 2003 15:27:13 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 37B4F1112F3; Thu, 29 May 2003 15:25:27 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA07114 for linac-eng-list; Thu, 29 May 2003 07:56:45 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from whses01.wellmont.org (whses01.wellmont.org [151.102.96.168]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA07110 for ; Thu, 29 May 2003 07:56:43 -0500 (CDT) Received: by whses01.wellmont.org with Internet Mail Service (5.5.2653.19) id ; Thu, 29 May 2003 08:56:10 -0400 Message-ID: <7AF61AA0D5DBD511B2990090274E7316796A0B@whses02.wellmont.org> From: "Falcinelli, Marc A" To: "'Tirabassi Michael'" , "Linac list (E-mail)" Subject: RE: Exact Couch Lift brake Date: Thu, 29 May 2003 08:56:09 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "Falcinelli, Marc A" To: "'Tirabassi Michael'" , "Linac list (E-mail)" Subject: RE: Exact Couch Lift brake Date: Thu, 29 May 2003 08:56:09 -0400 Sender: owner-linac-eng@plato.aristotle.net Mike, I would first check the DAC PCB alignment in the STD cardrack. Next I would check the AMC drive module alignment for the couch vertical drive. Either one of those alignments or a combination of both could cause the problem you are seeing. Marc -----Original Message----- From: Tirabassi Michael [mailto:Michael.Tirabassi@HCAHealthcare.com] Sent: Wednesday, May 28, 2003 3:22 PM To: Linac list (E-mail) Subject: Exact Couch Lift brake Hello to all, I have an interesting situation with our 21EX #1485 exact couch. It seems that when any couch function is initiated the lift brake is released and the couch vertical will creep downwards ever so slowly. It is most noticeable when rotating the couch from 90 to 270. We are talking about a half a cm drop. With lateral or longitudinal movement you need to move back and forth several times to notice it. Obviously when couch vertical is actuated the brake is released but I wouldn't think it would be released for the other functions. I can watch DS16 on stand BCM light up with any couch function. BCM seems to be configured correctly. Anybody seen this or maybe check your machine for similar problem. Thanks, Mike T. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 29 16:56:42 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19LOpe-0006ni-00; Thu, 29 May 2003 16:56:42 +0200 Received: from ruumf1.med.uu.nl (ruumf1.med.uu.nl [131.211.184.41]) by caviar.isi.uu.nl (Postfix) with ESMTP id A3E951112F3 for ; Thu, 29 May 2003 16:54:58 +0200 (METDST) Received: from conversion.med.uu.nl by med.uu.nl (PMDF V5.2-31 #45106) id <01KWGYSML49S8WWS4R@med.uu.nl> for kok@radth.med.uu.nl; Thu, 29 May 2003 16:52:59 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by med.uu.nl (PMDF V5.2-31 #45106) with ESMTP id <01KWGYSKQL6M8X3Z45@med.uu.nl> for kok@radth.med.uu.nl; Thu, 29 May 2003 16:52:58 +0200 Received: by plato.aristotle.net (8.9.0/8.9.0) id HAA07114 for linac-eng-list; Thu, 29 May 2003 07:56:45 -0500 (CDT) Received: from whses01.wellmont.org (whses01.wellmont.org [151.102.96.168]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id HAA07110 for ; Thu, 29 May 2003 07:56:43 -0500 (CDT) Received: by whses01.wellmont.org with Internet Mail Service (5.5.2653.19) id ; Thu, 29 May 2003 08:56:10 -0400 Date: Thu, 29 May 2003 08:56:09 -0400 From: "Falcinelli, Marc A" Subject: RE: Exact Couch Lift brake Sender: owner-linac-eng@plato.aristotle.net To: 'Tirabassi Michael' , "Linac list (E-mail)" Message-id: <7AF61AA0D5DBD511B2990090274E7316796A0B@whses02.wellmont.org> MIME-version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-type: text/plain Precedence: bulk X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f *** EOOH *** Date: Thu, 29 May 2003 08:56:09 -0400 From: "Falcinelli, Marc A" Subject: RE: Exact Couch Lift brake Sender: owner-linac-eng@plato.aristotle.net To: 'Tirabassi Michael' , "Linac list (E-mail)" X-Authentication-warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Mike, I would first check the DAC PCB alignment in the STD cardrack. Next I would check the AMC drive module alignment for the couch vertical drive. Either one of those alignments or a combination of both could cause the problem you are seeing. Marc -----Original Message----- From: Tirabassi Michael [mailto:Michael.Tirabassi@HCAHealthcare.com] Sent: Wednesday, May 28, 2003 3:22 PM To: Linac list (E-mail) Subject: Exact Couch Lift brake Hello to all, I have an interesting situation with our 21EX #1485 exact couch. It seems that when any couch function is initiated the lift brake is released and the couch vertical will creep downwards ever so slowly. It is most noticeable when rotating the couch from 90 to 270. We are talking about a half a cm drop. With lateral or longitudinal movement you need to move back and forth several times to notice it. Obviously when couch vertical is actuated the brake is released but I wouldn't think it would be released for the other functions. I can watch DS16 on stand BCM light up with any couch function. BCM seems to be configured correctly. Anybody seen this or maybe check your machine for similar problem. Thanks, Mike T. 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu May 29 18:25:08 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19LQDE-00071G-00; Thu, 29 May 2003 18:25:08 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 7AAD11112F3; Thu, 29 May 2003 18:23:22 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id KAA10690 for linac-eng-list; Thu, 29 May 2003 10:50:32 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from nasvir01.nas.medcity.net (mail.nas.medcity.net [199.91.33.30]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id KAA10685 for ; Thu, 29 May 2003 10:50:30 -0500 (CDT) Received: from 165.214.16.65 by nasvir01.nas.medcity.net (InterScan E-Mail VirusWall NT); Thu, 29 May 2003 10:50:12 -0500 Received: by corpexcon01.corp.medcity.net with Internet Mail Service (5.5.2655.55) id ; Thu, 29 May 2003 10:49:04 -0500 Message-ID: <39A90AC123CB9D428821E2BC273E73CD01F8667C@ftwex03.ftw.medcity.net> From: Tirabassi Michael To: "Linac list (E-mail)" Subject: RE: Exact Couch lift "Brake" Date: Thu, 29 May 2003 10:49:21 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="ISO-8859-1" Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: Tirabassi Michael To: "Linac list (E-mail)" Subject: RE: Exact Couch lift "Brake" Date: Thu, 29 May 2003 10:49:21 -0500 Sender: owner-linac-eng@plato.aristotle.net Hello, Let me clear up a few things regarding the Exact couch lift "Brake" problem! Sometimes I think in "shorthand" which can lead to a condition called "head space syndrome". First of all, I realize there is no "brake" for the vertical drive motor on the couch but there is a signal called liftbrk+ which powers the coil of K12 on the back connected mother board. With contacts pulled in liftamp+ & liftamp-( from J5 1 & 2 lift driver) contacts 6 & 4 pass to contacts 9 & 7 and go to J4 1 & 2 (lift+/-) and on out to the lift motor. I can understand how the couch could drift with some driver "leakage" but I guess what I'm trying to figure out is why K12 gets pulled in (DS16 "on" labeled as lift brake on BCM pcb) when couch long or lat or rotation is actuated. I see no need for the couch vertical K12 relay to be pulled in when not calling for vertical drive. Is this one of those situations where "that's the way it is" or is there some problem here. (not counting my head space)! I would like to know if other machines exhibit a similar way of functioning. Some of the schematics are hard to follow due to small print and the occasional slobber of drool. Am I digging to deep or do I just need a vacation? I appreciate the posts on calibrating the lift servo and this will I do as soon as I can get some info on the procedure. My data book shows the driver as part of the catch all panel and a print of that panel but that's all. Thanks, Mike T. 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri May 30 19:31:45 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19LnjF-00032D-00; Fri, 30 May 2003 19:31:45 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 173911112F3; Fri, 30 May 2003 19:29:51 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id LAA05142 for linac-eng-list; Fri, 30 May 2003 11:54:09 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from scf.sk.ca (shin.communitynet.ca [216.174.136.2]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id LAA05138 for ; Fri, 30 May 2003 11:54:07 -0500 (CDT) Received: from neried.scf.sk.ca (unverified [172.24.48.3]) by scf.sk.ca (Rockliffe SMTPRA 5.2.4) with SMTP id for ; Fri, 30 May 2003 10:54:02 -0600 Received: from scf.sk.ca ([172.24.49.78]) by neried.scf.sk.ca (NAVGW 2.5.2.21) with SMTP id M2003053010545717538 for ; Fri, 30 May 2003 10:54:57 -0600 Message-ID: <3ED78CCA.12C1F4C8@scf.sk.ca> Date: Fri, 30 May 2003 10:54:34 -0600 From: John Cocarell X-Mailer: Mozilla 4.7 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: linac-eng@plato.aristotle.net Subject: Varian GFIL digital gun deck Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 30 May 2003 10:54:34 -0600 From: John Cocarell X-Accept-Language: en To: linac-eng@plato.aristotle.net Subject: Varian GFIL digital gun deck Sender: owner-linac-eng@plato.aristotle.net Varian C3 s/n 1015. Got the GFIL's back on all energies, and rebooting controller didn't clear it this time. Now fuse F1 in the cold deck power supply is blowing, checked crobar, switches seem to be okay. Any suggestions? -- _________________________ John Cocarell Physics Technician Allan Blair Cancer Centre Regina, Sask. Canada 306 766 2286 1,, X-Coding-System: iso-latin-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Jun 05 08:58:43 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Nohv-0003UE-00; Thu, 05 Jun 2003 08:58:43 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 03F021112F4; Thu, 5 Jun 2003 08:56:26 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id BAA27807 for linac-eng-list; Thu, 5 Jun 2003 01:33:21 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail.hongkong.com (hongkong.com [202.84.12.153] (may be forged)) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id BAA27803 for ; Thu, 5 Jun 2003 01:33:18 -0500 (CDT) From: qehrtws@mail.hongkong.com Received: from mail.hongkong.com([10.1.7.102]) by mail.hongkong.com(JetMail 2.5.3.0) with SMTP id jma3edf26d9; Thu, 5 Jun 2003 06:31:15 -0000 Content-Type: text/plain Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Message-ID: <5W969394856885.03345@mail0.hongkong.com> Date: Thu, 5 Jun 2003 14:31:14 +0800 (CST) To: linac-eng@plato.aristotle.net Subject: MLC controller difficult to boot up X-Priority: 3 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: qehrtws@mail.hongkong.com Date: Thu, 5 Jun 2003 14:31:14 +0800 (CST) To: linac-eng@plato.aristotle.net Subject: MLC controller difficult to boot up X-Priority: 3 Sender: owner-linac-eng@plato.aristotle.net Dear All, We have 3 Varian MLC linac, in the past, the 52 & 80 leaves MLC controller remain ON overnight and 120 leaves turn OFF after treatment. Recently, we turn OFF all controller after treatment in order to eliminate the movement of the MLC motor due to noise and servo feed back. We found the 52 & 80 leaves MLC controller is difficult to reboot when in the PC is cold, I need to boot and initialise them several times to make it work. (In the past I only press the reset button on the PC to reboot once and OK) 1. Dose anyone got the same experience? 2. Does anyone know, the MLC servo system is in the PCBs inside the gantry head and the PC only send the position command and send error signal to Clinac if the read back position is out of tolerance. OR it need the PC to do the real time servo feedback? RT Workshop QEH, Hong Kong ----------------------------------------------------------------------------------- MMORPG Shadowbane ��u��]�1/4C��v��C��(r)M��(HK$38) ��30-day ��끶O��C��d��g��w��W��! The Ultimate MMORPG by So-net HK http://shadowbane.so-net.com.hk ��F�(r)�恭�*��G �3/4�ǁ�^��y��A��e��󁴁��q�� http://www.linguaphonegroup.com/BannerTrack.asp?EMSCode=HKI03-06ETFM-0814 1,, X-Coding-System: iso-8859-1-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Jun 05 12:26:07 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Nrwd-0006VP-00; Thu, 05 Jun 2003 12:26:07 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id EBAC41112F5; Thu, 5 Jun 2003 12:23:48 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id FAA01525 for linac-eng-list; Thu, 5 Jun 2003 05:04:38 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from pebble.orebroll.se ([194.103.185.215]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id FAA01521 for ; Thu, 5 Jun 2003 05:04:36 -0500 (CDT) From: terry.kearey@orebroll.se Received: from [192.168.250.102] by [192.168.250.24] with TFS Secure Messaging; Thu, 5 Jun 2003 12:04:23 +0200 Received: by exchange-1.orebroll.se with Internet Mail Service (5.5.2653.19) id ; Thu, 5 Jun 2003 12:04:23 +0200 Message-ID: <735AFCF366C6D211B1FF00A0C9EA2A4D062670A1@exchange-5.orebroll.se> To: linac-eng@plato.aristotle.net Subject: RE: MLC controller difficult to boot up Date: Thu, 5 Jun 2003 12:04:21 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id FAA01522 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: terry.kearey@orebroll.se To: linac-eng@plato.aristotle.net Subject: RE: MLC controller difficult to boot up Date: Thu, 5 Jun 2003 12:04:21 +0200 X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id FAA01522 Sender: owner-linac-eng@plato.aristotle.net The most likely cause is still motors or too much friction. You can measure the motor currents to see which are high or run all leaves out in a fixed field then switch to service mode and do a 'retract all'. Note then which leaves are slow. You probably know this. It can also be that it's time to dismantle all the leaves and clean them and the tracks, lubricate the screws etc. The friction builds up and often leads to this. Tel. -----Original Message----- From: qehrtws@mail.hongkong.com [mailto:qehrtws@mail.hongkong.com] Sent: den 5 juni 2003 08:31 To: linac-eng@plato.aristotle.net Subject: MLC controller difficult to boot up Dear All, We have 3 Varian MLC linac, in the past, the 52 & 80 leaves MLC controller remain ON overnight and 120 leaves turn OFF after treatment. Recently, we turn OFF all controller after treatment in order to eliminate the movement of the MLC motor due to noise and servo feed back. We found the 52 & 80 leaves MLC controller is difficult to reboot when in the PC is cold, I need to boot and initialise them several times to make it work. (In the past I only press the reset button on the PC to reboot once and OK) 1. Dose anyone got the same experience? 2. Does anyone know, the MLC servo system is in the PCBs inside the gantry head and the PC only send the position command and send error signal to Clinac if the read back position is out of tolerance. OR it need the PC to do the real time servo feedback? RT Workshop QEH, Hong Kong ---------------------------------------------------------------------------- ------- MMORPG Shadowbane ��u��]�1/4C��v��C��(r)M��(HK$38) ��30-day ��끶O��C��d��g��w��W��! The Ultimate MMORPG by So-net HK http://shadowbane.so-net.com.hk ��F�(r)�恭�*��G �3/4�ǁ�^��y��A��e��󁴁��q�� http://www.linguaphonegroup.com/BannerTrack.asp?EMSCode=HKI03-06ETFM-0814 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Jun 05 16:25:16 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Nvg4-0001On-00; Thu, 05 Jun 2003 16:25:16 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 649921112F4; Thu, 5 Jun 2003 16:22:51 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA04152 for linac-eng-list; Thu, 5 Jun 2003 09:00:50 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail1.nhs.uk (mail1.nhs.uk [213.120.235.81]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA04148 for ; Thu, 5 Jun 2003 09:00:49 -0500 (CDT) Received: from hn-ext by mail1.nhs.uk (Sendmail 8.8.8) with esmtp id 19NvHs-0000Jl-00; Thu, 05 Jun 2003 15:00:16 +0100 Received: from relay.nhs.uk (194.62.42.142) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B60101A74A for linac-eng@plato.aristotle.net; Thu, 5 Jun 2003 15:00:16 +0100 Received: from smtp.leedsth.nhs.uk (163.160.107.2) by relay.nhs.uk (Syntegra-2 7.0.008) (authenticated as smtp_leedsth_nhs_uk@es2002.nhs.uk) id 3EDDBE910006BBCC for linac-eng@plato.aristotle.net; Thu, 5 Jun 2003 15:00:16 +0100 Received: from LTH-MTA by smtp.leedsth.nhs.uk with Novell_GroupWise; Thu, 05 Jun 2003 14:38:00 +0100 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Thu, 05 Jun 2003 14:37:45 +0100 From: "Chris Forrest" To: Subject: Nucletron Simulix HP CT Extension Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id JAA04149 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 05 Jun 2003 14:37:45 +0100 From: "Chris Forrest" To: Subject: Nucletron Simulix HP CT Extension Content-Disposition: inline X-MIME-Autoconverted: from quoted-printable to 8bit by plato.aristotle.net id JAA04149 Sender: owner-linac-eng@plato.aristotle.net We've got some problems with the CT Add-on in that aborts either just before the exposure starts OR during the exposure. The Simulix screen usually displays "Foreslit not correctly placed". Upon checking the CTACQ.log held on the CT OS2 computer we find: Jun 02 2003 08:34:20.190 ACQ_UI: error 1110 CT_READY signal to Simulix unexpectedly not active (error 1110). Error reported by CTU: XRF comm. error. Jun 02 2003 08:34:26.660 ACQ_UI: error 1110 CT_READY signal to Simulix unexpectedly not active (error 1110). Error reported by CTU: XRF comm. error. Jun 02 2003 08:35:22.000 ACQ_UI: warning 130 The CTU and XRF are out of sync The CT camera data and X-ray reference have not been measured at the same sync pulse (error 130). Jun 02 2003 08:35:22.910 ACQ_UI: error 1110 CT_READY signal to Simulix unexpectedly not active (error 1110). Error reported by CTU: XRF comm. error. Jun 02 2003 08:35:39.410 ACQ_UI: error 1110 CT_READY signal to Simulix unexpectedly not active (error 1110). Error reported by CTU: XRF comm. error. Jun 02 2003 08:35:43.250 ACQ_UI: warning 130 The CTU and XRF are out of sync The CT camera data and X-ray reference have not been measured at the same sync pulse (error 130). Jun 02 2003 08:35:51.410 ACQ_UI: warning 120 There is no communication with the XRF (error 120). Jun 02 2003 08:35:51.410 ACQ_UI: error 1110 CT_READY signal to Simulix unexpectedly not active (error 1110). Error reported by CTU: XRF comm. error. Jun 02 2003 08:35:51.500 ACQ_UI: warning 170 There is no communication with the FSU (error 170). Jun 02 2003 08:35:51.660 ACQ_UI: error 30 CT-Extension system error ! Too many incomplete or missing profiles (error 30) During a period of 2 seconds 11 incomplete profiles have been received and 0 profiles have been missed. We suspect that a failure in comms between the Foreslit/Xray Ref assembly and GAB or CTU is triggering the above events. I can think of many things that COULD cause this problem such as cabling, connectors, PSU but I'm hoping that someone else out there has seen it before and can perhaps suggest a common failure point? Thanks in advance Chris Chris Forrest Technical Specialist Radiotherapy Technology Services Department of Medical Physics & Engineering Leeds Teaching Hospitals NHS Trust Cookridge Hospital Hospital Lane Leeds LS16 6QB UK Tel. +44 113 3924354 Fax. +44 113 3924122 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Jun 05 19:49:57 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19Nys9-0002Vh-00; Thu, 05 Jun 2003 19:49:57 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 03A2E1112F4; Thu, 5 Jun 2003 19:47:36 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id MAA08342 for linac-eng-list; Thu, 5 Jun 2003 12:27:44 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id MAA08338 for ; Thu, 5 Jun 2003 12:27:43 -0500 (CDT) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Thu, 05 Jun 2003 14:25:19 -0300 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Date: Thu, 05 Jun 2003 14:25:03 -0300 From: "David Burgess" To: , Subject: Re: MLC controller difficult to boot up Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=_1A45F6EF.5332C116" X-Guinevere: 1.1.14 ; Nova Scotia Hospital Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Thu, 05 Jun 2003 14:25:03 -0300 From: "David Burgess" To: , Subject: Re: MLC controller difficult to boot up X-Guinevere: 1.1.14 ; Nova Scotia Hospital Sender: owner-linac-eng@plato.aristotle.net --=_1A45F6EF.5332C116 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hello QEH in Hong Kong, In the past when you had MLC Controller Computors always ON, pressing = reset once and initializing was OK, indicates that the leave motors moved = the leaves OK. Now with the MLC Controller Computor turned off nights, needing to reboot = several times could mean many things. We really need to know what errors = occur (what messages do you get that tell you it failed , before you = reboot again). Does the MLC Controller Computor actually start initializing= or not even get to MLCX ? David Burgess Nova Scotia Cancer Centre >>> 6/5/2003 3:31:14 AM >>> Dear All, We have 3 Varian MLC linac, in the past, the 52 & 80 leaves MLC controller = remain ON overnight and 120 leaves turn OFF after treatment. Recently, we turn OFF all controller after treatment in order to eliminate = the movement of the MLC motor due to noise and servo feed back. We found = the 52 & 80 leaves MLC controller is difficult to reboot when in the PC is = cold, I need to boot and initialise them several times to make it work. = (In the past I only press the reset button on the PC to reboot once and = OK) 1. Dose anyone got the same experience? 2. Does anyone know, the MLC servo system is in the PCBs inside the = gantry head and the PC only send the position command and send error = signal to Clinac if the read back position is out of tolerance. OR it need = the PC to do the real time servo feedback? RT Workshop QEH, Hong Kong ---------------------------------------------------------------------------= -------- MMORPG Shadowbane =A1u=C5]=BCC=A1v*C=C0=B8=AEM=B8=CB(HK$38) =A4=CE30-day = =A4=EB=B6O*C=C0=B8=A5d=B8g=A4w=A4W=A5=AB! The Ultimate MMORPG by So-net HK http://shadowbane.so-net.com.hk =C6F=AE=E6-=B7=A1G =BE=C7-^=BBy=A1A=B0e=A2=B0=A2=B4=B0=F3=B4=B6=B3q=B8=DC http://www.linguaphonegroup.com/BannerTrack.asp?EMSCode=3DHKI03-06ETFM-0814= This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. --=_1A45F6EF.5332C116 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

Hello QEH in Hong Kong,=

In the past when you had MLC = Controller=20 Computors always ON, pressing reset once and initializing was OK, = indicates that=20 the leave motors moved the leaves OK.

Now with the MLC Controller = Computor=20 turned off nights, needing to reboot several times could mean many things. = We=20 really need to know what errors occur (what messages do you get that tell = you it=20 failed , before you reboot again). Does the MLC Controller Computor = actually=20 start initializing or not even get to MLCX ?

David Burgess

Nova Scotia Cancer=20 Centre

>>> <qehrtws@mail.hongkong.com> = 6/5/2003=20 3:31:14 AM >>>
Dear All,

We have 3 Varian MLC linac, in = the=20 past, the 52 & 80 leaves MLC controller remain ON overnight and 120 = leaves=20 turn OFF after treatment.

Recently, we turn OFF all controller = after=20 treatment in order to eliminate the movement of the MLC motor due to noise = and=20 servo feed back. We found the 52 & 80 leaves MLC controller is = difficult to=20 reboot when in the PC is cold, I need to boot and initialise them several = times=20 to make it work. (In the past I only press the reset button on the PC to = reboot=20 once and OK)

1. Dose anyone got the same=20 experience?
2. Does anyone know, the MLC servo system = is in=20 the PCBs inside the gantry head and the PC only send the position command = and=20 send error signal to Clinac if the read back position is out of tolerance. = OR it=20 need the PC to do the real time servo feedback?

RT Workshop
Q= EH,=20 Hong=20 Kong
-------------------------------------------------------------------= ----------------
MMORPG=20 Shadowbane =A1u=C5]=BCC=A1v=B9C=C0=B8=AEM=B8=CB(HK$38) =A4=CE30-day = =A4=EB=B6O=B9C=C0=B8=A5d=B8g=A4w=A4W=A5=AB!
The Ultimate=20 MMORPG by So-net HK
http://shadowbane.so-net.com.hk

=C6F=AE=E6=B7=A1G=20 =BE=C7^=BBy=A1A=B0e=A2=B0=A2=B4=B0=F3=B4=B6=B3q=B8=DC
http://www.linguaphonegroup.com/BannerTrack.asp?EMSCode=3DHKI03-0= 6ETFM-0814

--=_1A45F6EF.5332C116-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Thu Jun 05 21:53:28 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19O0ng-0002l3-00; Thu, 05 Jun 2003 21:53:28 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 62C301112F4; Thu, 5 Jun 2003 21:51:09 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id OAA10552 for linac-eng-list; Thu, 5 Jun 2003 14:16:43 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from ares.host4u.net (ares.host4u.net [209.150.128.11]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id OAA10548 for ; Thu, 5 Jun 2003 14:16:42 -0500 (CDT) Received: from matt (pool-151-197-185-202.phil.east.verizon.net [151.197.185.202]) by ares.host4u.net (8.11.6/8.11.6) with ESMTP id h55JCj210881; Thu, 5 Jun 2003 14:12:45 -0500 Message-ID: <02d701c32b95$b5bba180$6501a8c0@verizon.net> From: "AMP" To: Cc: "Mr. Poonsub" References: <003601c32b80$a27cc500$afacfea9@kyeung> Subject: Employment opportunity in Thailand Date: Thu, 5 Jun 2003 15:07:28 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_02D4_01C32B74.2E2B5BA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "AMP" To: Cc: "Mr. Poonsub" Subject: Employment opportunity in Thailand Date: Thu, 5 Jun 2003 15:07:28 -0400 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_02D4_01C32B74.2E2B5BA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Does anyone want to work in Thailand for Elecktra LINAC ? > > Poonsub Suwansilisil > Diagnostic Imaging Manager > Asia Bio Systems(Thailand) Co.,Ltd. > 719 KPN Tower, 12th Flr, Rama 9 Rd, > Bangkapi, Huay-kwang,Bangkok 10320 > Tel. 66.2.7170760 > Fax.66.2.7170764 > Mobile 66.1.4416327 > URL :www.asiabio.com poonsub@asiabio.com . ------=_NextPart_000_02D4_01C32B74.2E2B5BA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Does anyone want to work in Thailand = for Elecktra=20 LINAC ?
>
> Poonsub Suwansilisil
> Diagnostic = Imaging=20 Manager
> Asia Bio Systems(Thailand) Co.,Ltd.
> 719 KPN = Tower, 12th=20 Flr, Rama 9 Rd,
> Bangkapi, Huay-kwang,Bangkok 10320
> Tel.=20 66.2.7170760
> Fax.66.2.7170764
> Mobile = 66.1.4416327
> URL=20 :www.asiabio.com
poonsub@asiabio.com=

------=_NextPart_000_02D4_01C32B74.2E2B5BA0-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Jun 06 06:20:07 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19O8hy-0003Kf-00; Fri, 06 Jun 2003 06:20:06 +0200 Received: from plato.aristotle.net (unknown [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 8A1691112F3; Fri, 6 Jun 2003 06:17:43 +0200 (METDST) Received: (from majordomo@localhost) by plato.aristotle.net (8.9.0/8.9.0) id WAA20301 for linac-eng-list; Thu, 5 Jun 2003 22:57:37 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from sccrmhc12.attbi.com (sccrmhc12.attbi.com [204.127.202.56]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id WAA20297 for ; Thu, 5 Jun 2003 22:57:36 -0500 (CDT) Received: from office2 (12-213-201-238.client.attbi.com[12.213.201.238](untrusted sender)) by attbi.com (sccrmhc12) with SMTP id <200306060357050120096kppe>; Fri, 6 Jun 2003 03:57:05 +0000 Message-ID: <002a01c32bdf$b8de3ea0$6501a8c0@office2> From: "jeremy" To: "linac-eng" Subject: service software Date: Thu, 5 Jun 2003 23:57:17 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0027_01C32BBE.31A40800" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f From: "jeremy" To: "linac-eng" Subject: service software Date: Thu, 5 Jun 2003 23:57:17 -0400 X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Sender: owner-linac-eng@plato.aristotle.net This is a multi-part message in MIME format. ------=_NextPart_000_0027_01C32BBE.31A40800 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable A while back there was a post regarding some service software available = for in house service engineers. The web-site is at www.boasoftware.com = The downloadable demo has not been put up on the website yet, but will = be very soon. There are screen shots of the software and descriptions. Regards ------=_NextPart_000_0027_01C32BBE.31A40800 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

A while back there was a post regarding = some=20 service software available for in house service engineers. The = web-site is=20 at www.boasoftware.com The=20 downloadable demo has not been put up on the website yet, but will be = very=20 soon. There are screen shots of the software and=20 descriptions.

Regards

------=_NextPart_000_0027_01C32BBE.31A40800-- 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Jun 06 17:25:28 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19OJ5r-0005VK-00; Fri, 06 Jun 2003 17:25:28 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 9E2B91112F5; Fri, 6 Jun 2003 17:23:01 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id JAA00141 for linac-eng-list; Fri, 6 Jun 2003 09:52:32 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from mail4.nhs.uk (mail4.nhs.uk [194.72.23.241]) by plato.aristotle.net (8.9.0/8.9.0) with ESMTP id JAA00131 for ; Fri, 6 Jun 2003 09:52:21 -0500 (CDT) Received: from hn-ext by mail4.nhs.uk (Sendmail 8.8.8) with esmtp id 19OIZD-0007hK-00; Fri, 06 Jun 2003 15:51:43 +0100 Received: from relay.nhs.uk (194.62.42.141) by relayint2.nhs.uk (Syntegra-I2 6.5.016) id 3E6079B6010557C5 for linac-eng@plato.aristotle.net; Fri, 6 Jun 2003 15:51:43 +0100 Received: from mailsweeper.suht.swest.nhs.uk (194.189.32.135) by relay.nhs.uk (Syntegra-1 7.0.008) id 3EDDBECC000BC4B5 for linac-eng@plato.aristotle.net; Fri, 6 Jun 2003 15:51:43 +0100 Received: from mail.suht.swest.nhs.uk (unverified) by mailsweeper.suht.swest.nhs.uk (Content Technologies SMTPRS 4.2.10) with ESMTP id for ; Fri, 6 Jun 2003 15:49:36 +0100 Received: from SGH-MTA by mail.suht.swest.nhs.uk with Novell_GroupWise; Fri, 06 Jun 2003 15:51:43 +0100 Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 Date: Fri, 06 Jun 2003 15:51:03 +0100 From: "John McKechnie" To: Subject: Downtime Reports Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 06 Jun 2003 15:51:03 +0100 From: "John McKechnie" To: Subject: Downtime Reports Content-Disposition: inline Sender: owner-linac-eng@plato.aristotle.net Hello list, I was just wondering if anyone has any articles or knows the location of any articles relating to Linac downtime. Its for one of our students who is doing a research project in particular looking at Linac downtime/breakdowns, services, reliability, repair time, service contracts, upgrades etc. I know you're all reallly busy but any help you may be able to give would be greatly appreciated. Lang may yir lum reek! John John McKechnie Head of Radiotherapy Electronics Wessex Radiotherapy Centre Royal Southants Hospital Brintons Terrace (Off St. Mary's Road) Southampton SO14 OYG Tel. 023 8082 5708 ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any views or opinions presented are solely those of The author and do not necessarily represent those of the Trust unless explicitly stated otherwise. If you have received this e-mail in error please delete the e-mail and contact the Southampton University Hospitals NHS Trust Helpdesk on:- 023 80796000 This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. ********************************************************************** 1,, X-Coding-System: undecided-unix Mail-from: From owner-linac-eng@plato.aristotle.net Fri Jun 06 19:16:43 2003 Received: from (caviar.isi.uu.nl) [131.211.144.138] by giraf.radth.ruu.nl with esmtp (Exim 3.12 #1 (Debian)) id 19OKpX-0005nU-00; Fri, 06 Jun 2003 19:16:43 +0200 Received: from plato.aristotle.net (plato.aristotle.net [206.66.224.2]) by caviar.isi.uu.nl (Postfix) with ESMTP id 202661112F2; Fri, 6 Jun 2003 19:14:18 +0200 (METDST) Received: by plato.aristotle.net (8.9.0/8.9.0) id LAA02630 for linac-eng-list; Fri, 6 Jun 2003 11:57:02 -0500 (CDT) X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Received: from NGATE01.qe2-hsc.ns.ca (smtp.qe2-hsc.ns.ca [142.176.37.4]) by plato.aristotle.net (8.9.0/8.9.0) with SMTP id LAA02626 for ; Fri, 6 Jun 2003 11:57:00 -0500 (CDT) Received: from sdc_dom-Message_Server by NGATE01.qe2-hsc.ns.ca with Novell_GroupWise; Fri, 06 Jun 2003 13:54:40 -0300 Message-Id: X-Mailer: Novell GroupWise Internet Agent 5.5.7.1 Date: Fri, 06 Jun 2003 13:54:35 -0300 From: "David Burgess" To: Subject: Varian LaserGuard Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=_316EE240.E3824E0E" X-Guinevere: 1.1.14 ; Nova Scotia Hospital Sender: owner-linac-eng@plato.aristotle.net Precedence: bulk *** EOOH *** X-Authentication-Warning: plato.aristotle.net: majordomo set sender to owner-linac-eng@plato.aristotle.net using -f Date: Fri, 06 Jun 2003 13:54:35 -0300 From: "David Burgess" To: Subject: Varian LaserGuard X-Guinevere: 1.1.14 ; Nova Scotia Hospital Sender: owner-linac-eng@plato.aristotle.net --=_316EE240.E3824E0E Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hello List, I'm interested in hearing from clinics that use the Varian LaserGuard = option. Have you had any problems with the device ? Have you found it beneficial = or is the regular collision system sufficient for most clinical needs ? Any comments appreciated. David Burgess Nova Scotia Cancre Centre This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version. --=_316EE240.E3824E0E Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

Hello List,

I'm interested in hearing = from clinics=20 that use the Varian LaserGuard option.

Have you had any problems = with the=20 device ? Have you found it beneficial or is the regular collision = system=20 sufficient for most clinical needs ?

Any comments appreciated.

David Burgess

Nova Scotia Cancre=20 Centre

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