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<span>Hi Greg,</span></div>
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<span><br>
</span></div>
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<span>I'm also interested to hear how others do this. I had to write some code for this about a year ago, and didn't find it a simple task as I was brand new to Gate. I've attached some notes that I made back then, which I hope are of some help and don't just
confuse matters for you. I'm happy to share the code as well that generates my simulation files. </span></div>
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<span><br>
</span></div>
<div style="color: rgb(0, 0, 0); font-family: Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;">
<span>If anyone thinks my approach was way too convoluted and has a simpler method, I'd love to hear it.</span></div>
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<span><br>
</span></div>
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<span>Steve</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> on behalf of gate-users-request@lists.opengatecollaboration.org <gate-users-request@lists.opengatecollaboration.org><br>
<b>Sent:</b> 23 March 2021 08:06<br>
<b>To:</b> gate-users@lists.opengatecollaboration.org <gate-users@lists.opengatecollaboration.org><br>
<b>Subject:</b> Gate-users Digest, Vol 178, Issue 43</font>
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Today's Topics:<br>
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1. ImageNestedParametrisedVolume and<br>
TranslateTheImageAtThisIsoCenter: placing CT at RTPlan Isocenter<br>
in GATE (G Tom)<br>
2. Fig1 (王瘢雹天泉)<br>
<br>
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----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Tue, 23 Mar 2021 00:45:55 -0400<br>
From: G Tom <gregthom992@gmail.com><br>
To: Gate-users <gate-users@lists.opengatecollaboration.org><br>
Subject: [Gate-users] ImageNestedParametrisedVolume and<br>
TranslateTheImageAtThisIsoCenter: placing CT at RTPlan Isocenter in<br>
GATE<br>
Message-ID:<br>
<CAFh_-OOimSFczGceTNhVWfTNJOAKGXpccAtLcZPAVms4yipnrw@mail.gmail.com><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
HI<br>
I am using ImageNestedParametrisedVolume to place my ct dataset in GATE.<br>
I have two questions:<br>
<br>
1) I don't understand how GATE places the volume. For instance To place my<br>
volume with the origin at the desired isocenter I export the plan from<br>
Eclipse planning system and I use sitk to get the isocenter tag : (300a,<br>
012c) Isocenter Position DS: [0, -7.1054274e-15, 0]<br>
(basically 0,0,0. That means I use<br>
/gate/patient/geometry/TranslateTheImageAtThisIsoCenter 0. 0 0. mm. This<br>
doesn't seem right to me as GATE does not account for the<br>
ImagePositionPatient and Orientation ? I use vv to convert the diom ct to<br>
mhd.<br>
<br>
2) How are people placing volumes accurately in GATE from a treatment<br>
planning system RT Plan file ? Please show some step by step if you can.<br>
<br>
Thanks<br>
GT<br>
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Message: 2<br>
Date: Tue, 23 Mar 2021 16:38:05 +0800 (GMT+08:00)<br>
From: 王瘢雹天泉 <wangtq17@lzu.edu.cn><br>
To: gate-users@lists.opengatecollaboration.org<br>
Cc: zhangqh19@lzu.edu.cn<br>
Subject: [Gate-users] Fig1<br>
Message-ID: <b95a18b.5df2.1785e3be096.Coremail.wangtq17@lzu.edu.cn><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Dear Gate-users,<br>
I'm confused when I simulated the Dosimetry generated by F-18.<br>
When I defined the source as a "e+" in a Cylinder geometry,<br>
the result seems it dose not have influence on the other region, as shown in appendix Fig1.png.<br>
<br>
When I defined the source as beam, a 0.511 MeV gamma ray, radiate the phantom, the result shows better.<br>
It had influence on a long region, as shown in appedix Fig2.png.<br>
<br>
So confused am I, thanks everyone!<br>
Your Sincerely,<br>
Quan<br>
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