<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div></div><div><span>Hello Gate-Users,</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><span>I
am using the XCAT phantom to simulate some PET and SPECT studies of
activity uptake in the liver and in a spherical tumour located in the
liver. There is no activity in the rest of my phantom. <br></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><span>I
have used the command attachVoxelSD to my phantom, but in my simulation
the scatter photons are extremely low around 3% and it's not seem
normal. <br></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><span>Had anyone come up with this problem in the past?</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">Any advices would be well accepted. Thank you in advance.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0);
font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">This is part of my .mac : <br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">#===================================================<br># PHANTOM<br>#===================================================<br><br>/gate/world/daughters/name <span class="tab"> <span
class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span></span> youri<br>/gate/world/daughters/insert <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span></span></span>regularMatrix<br>/gate/youri/geometry/insertReader <span class="tab"> <span class="tab"> <span
class="tab"> <span class="tab"> </span></span></span></span>interfile<br>/gate/youri/interfileReader/insertTranslator <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span> range<br>/gate/youri/interfileReader/rangeTranslator/readTable ../data/attenuation.dat<br>/gate/youri/interfileReader/rangeTranslator/describe <span class="tab"> </span> 1<br>/gate/youri/interfileReader/readFile <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span>
../data/youri_cancered_atn_1.h33<br>/gate/youri/placement/setRotationAxis <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span>1 0 0<br>/gate/youri/placement/setRotationAngle <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span>0 deg<br>/gate/youri/placement/setTranslation <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span
class="tab"></span></span></span></span></span></span> 0. 0. -18. mm<br>/gate/youri/attachVoxelPhantomSD</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">#=======================================<br># VOXELIZED SOURCES<br>#=======================================<br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style:
normal;">/gate/source/addSource <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span></span></span></span></span>GaMAA voxel<br>/gate/source/GaMAA/reader/insert <span class="tab"> <span
class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span></span></span> interfile<br>/gate/source/GaMAA/interfileReader/translator/insert <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span>range<br>/gate/source/GaMAA/interfileReader/rangeTranslator/readTable ../data/activityTCMAA.dat<br>/gate/source/GaMAA/interfileReader/rangeTranslator/describe 1<br>/gate/source/GaMAA/interfileReader/readFile
../data/youri_cancered_atn_1.h33<br>/gate/source/GaMAA/gps/particle ion<br>/gate/source/GaMAA/gps/ion <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span></span></span>31 68 0 0<br>/gate/source/GaMAA/gps/energytype <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span>Mono
<br>/gate/source/GaMAA/gps/monoenergy <span class="tab"> <span class="tab"> </span></span>0. eV<br>/gate/source/GaMAA/setForcedUnstableFlag <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span>true<br>/gate/source/GaMAA/useDefaultHalfLife <br>/gate/source/GaMAA/setPosition <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span> -192.0 -192.0 -304.5 mm<br>/gate/source/GaMAA/gps/angtype <span
class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span>iso<br>/gate/source/GaMAA/gps/confine <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> </span></span></span></span>NULL<br>/gate/source/GaMAA/dump <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab"> <span class="tab">
</span></span></span></span></span></span></span></span>1<br>/gate/source/list<br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><span><br></span></div>Best regards,<br>Konstantinos Mountris. <div> </div><div><span style="font-size:13px;"><span style="font-style:italic;"><span style="font-family:bookman old style, new york, times, serif;"><span style="font-weight:bold;"><br><br>----<br><br>http://about.me/constantine.mountris :.<br></span></span></span></span></div></div></body></html>