<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'>Dear Gate users<br>I voxelize a phantom from a CT image, I started with a slice thickness of 2mm<br><br> I studied three cases:<div><br></div><div>- A phantom with material</div><div>- A phantom without material (filled with air)</div><div>- No phantom</div> <br> But the problem, I always find the same results even when I increase the thickness to 200. For the first case and the second and the last I find even just the number of photons scattered 0<div><br>
<style><!--
.ExternalClass .ecxhmmessage P {
padding:0px;
}
.ExternalClass body.ecxhmmessage {
font-size:12pt;
font-family:Calibri;
}
--></style>
<div dir="ltr"><br><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><br></div><div><br></div><div><p class="ecxMsoNormal">I compare the simulation results of a cylinder filled with air and without cylinder I found a defference. I do not know why</p><p class="ecxMsoListParagraphCxSpLast" style="text-indent:-.25in;"><span lang="FR"><br></span></p>
<p class="ecxMsoNormal" style=""></p><p class="ecxMsoNormal" style=""><br></p><BR><p class="ecxMsoNormal" style=""><span lang="FR"> </span></p>
<p class="ecxMsoNormal" style=""><span lang="FR">Do you have an explanation for this. </span></p><p class="ecxMsoNormal" style=""><span lang="FR"><br></span></p><p class="ecxMsoNormal" style=""><span lang="FR"><br></span></p>
<p class="ecxMsoNormal" style=""><span lang="FR">phantom and source </span><span style="font-size: 12pt;">files</span><span style="font-size: 12pt;">:</span></p><p class="ecxMsoNormal" style=""><span lang="FR"><br></span></p><p class="ecxMsoNormal" style=""><span lang="FR"><br></span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";"># P H A N T O M</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";"> </span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";"> </span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/world/daughters/name HRRT_brain</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/world/daughters/insert parameterizedBoxMatrix</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/HRRT_brain/geometry/insertReader interfile</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/HRRT_brain/interfileReader/insertTranslator
range</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/HRRT_brain/interfileReader/rangeTranslator/readTable
range_atten_brain_original.dat</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/HRRT_brain/interfileReader/rangeTranslator/describe
1</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/HRRT_brain/interfileReader/readFile CT.h33</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/HRRT_brain/placement/setTranslation 0. 0. 0.
mm</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/HRRT_brain/attachVoxelPhantomSD</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/endshielding/attachPhantomSD</span></p>
<p class="ecxMsoNormal" style=""><span style="font-size:9.0pt;font-family:"Courier New";">/gate/HRRT_brain/verbose 2</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR"> </span></p>
<p class="ecxMsoNormal"><span lang="FR"># Point Source</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/addSource
F18LineSource</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/setActivity
3700000. becquerel</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";"> </span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/gps/particle
e+ </span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/setForcedUnstableFlag
true </span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/setForcedHalfLife
6586.2 s</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/gps/energytype
Fluor18</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/gps/type Point </span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/gps/angtype
iso</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/gps/centre
0. 0. 0. mm</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/F18LineSource/dump
1</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">#/gate/source/F18LineSource/visualize
2000 red 5 </span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";"> </span></p>
<p class="ecxMsoNormal" style=""><span lang="FR" style="font-size:9.0pt;font-family:"Courier New";">/gate/source/list</span></p>
<p class="ecxMsoNormal" style=""><span lang="FR"> </span></p></div><div><br></div><div><br></div><div><br></div><div>Many Thanks</div> <br> <br> <br> <br> <br> <br> <br> <br><br><br><font color="#0000ff" size="5"><a href="http://www.bicoeur.com/" target="_blank"><br></a></font><br><font color="#0000ff" size="5"><a href="http://www.bicoeur.com/" target="_blank"><br></a></font><br> <br><br> </div></div><style><!--
.ExternalClass .ecxhmmessage P {
padding:0px;
}
.ExternalClass body.ecxhmmessage {
font-size:12pt;
font-family:Calibri;
}
--></style> </div></div> </div></div><style><!--
.ExternalClass .ecxhmmessage P {
padding:0px;
}
.ExternalClass body.ecxhmmessage {
font-size:12pt;
font-family:Calibri;
}
--></style><style><!--
.ExternalClass .ecxhmmessage P {
padding:0px;
}
.ExternalClass body.ecxhmmessage {
font-size:12pt;
font-family:Calibri;
}
--></style> </div></div> </div></body>
</html>