<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "> Thanks Simon,<div><br class="webkit-block-placeholder"></div><div>The two rod sources are confined in cylindrical shaped rods in a phantom, which is also cylindrical shaped. It doesn't show up clearly just because I set it as wire frame instead of solid volume for some reason. I used this confinement for the sources since the source will be moved during my simulation later.</div><div><br class="webkit-block-placeholder"></div><div>Anyway, I think I found the problem. As shown in the part of macro, I set the geometry of sources, which is not necessary for this case because the sources have been confined with other geometrical volume. So, I got rid of the geometrical setting part for two sources and now the display also look much better than before. I'll post the result from this simulation later if the result doesn't look beautiful.</div><div><br class="webkit-block-placeholder"></div><div>Best regards,</div><div>Joon Young</div><div><br class="webkit-block-placeholder"></div><div><div><div>On 7-Dec-07, at 5:20 PM, Simon Stute wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Hi Joon,<br><br>Display is just display, not very faithful ... Have you got the same results in your root results (or other kind of output results) ??<br>I don't see any attenuation volume in your display, did you build some ?? Because the 'confine' macro command is usually used to fix an 'activity volume' to a geometrical volume (assigned with a material) that is moving during the simulation. You have defined some cylindrical shape activity volume but in your display, its look like that it is a point source 'volume'. What is your complete macro file ? <br><br>Cheers,<br>Simon<br><br><div><span class="gmail_quote">2007/12/7, Joon Young Suk <<a href="mailto:joonyoung.suk@gmail.com">joonyoung.suk@gmail.com</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div style=""><div><blockquote type="cite"><br><div><blockquote type="cite"><div style="margin: 0px; min-height: 14px;"><br></div> <div style="margin: 0px;">Hi all,</div><div style="margin: 0px;">I am trying to simulate the scan with a cylindrical phantom which as two rod source inside. </div><div style="margin: 0px;">I built two rod sources with cylindrical geometry and set the angle type as "iso".</div><div style="margin: 0px;">I think the LORs should be randomly distributed through all 4pi angle, but the simulation doesn't look like that. </div><div style="margin: 0px; min-height: 14px;"><br></div><div style="margin: 0px;">From the display during the simulation, I can see most LORs are lying horizontally on the centre plane.</div><div style="margin: 0px; min-height: 14px;"> <br></div><div style="margin: 0px;">Please check the image from the followed link :</div><div style="margin: 0px; min-height: 14px;"><br></div><div style="margin: 0px;"><a href="http://www.joonyoung.net/iso.jpg" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> http://www.joonyoung.net/iso.jpg</a></div><div style="margin: 0px; min-height: 14px;"><br></div><div style="margin: 0px;">Also, here is my code for the source part.</div><div style="margin: 0px; min-height: 14px;"><br></div> <div style="margin: 0px;">Please, let me know what should I do to correct it and make real isotropic emission.</div><div style="margin: 0px; min-height: 14px;"><br></div><div style="margin: 0px;">Thanks,</div><div style="margin: 0px;"> Joon Young Suk<br></div><div style="margin: 0px; min-height: 14px;"><br></div><div style="margin: 0px;"># S O U R C E S</div><div style="margin: 0px;">/gate/source/addSource rodsource0</div><div style="margin: 0px;">################################################################### </div><div style="margin: 0px;">/gate/source/rodsource0/setActivity {activity} becquerel</div><div style="margin: 0px;">/gate/source/rodsource0/setType backtoback</div><div style="margin: 0px;">/gate/source/rodsource0/gps/particle gamma </div><div style="margin: 0px;">/gate/source/rodsource0/gps/energytype Mono</div><div style="margin: 0px;">/gate/source/rodsource0/gps/monoenergy 0.511 MeV</div><div style="margin: 0px;">/gate/source/rodsource0/gps/type Volume </div><div style="margin: 0px;">/gate/source/rodsource0/gps/shape Cylinder</div><div style="margin: 0px;">/gate/source/rodsource0/gps/radius 0.5 mm</div><div style="margin: 0px;">/gate/source/rodsource0/gps/halfz 25.0 mm</div> <div style="margin: 0px;">/gate/source/rodsource0/gps/centre {rod0Xposition} 0. 0. mm</div><div style="margin: 0px;">/gate/source/rodsource1/gps/angtype iso</div><div style="margin: 0px;">/gate/source/rodsource0/gps/confine rod0_P </div><div style="margin: 0px; min-height: 14px;"><br></div><div style="margin: 0px;">/gate/source/addSource rodsource1</div><div style="margin: 0px;">###################################################################</div> <div style="margin: 0px;">/gate/source/rodsource1/setActivity {activity} becquerel</div><div style="margin: 0px;">/gate/source/rodsource1/setType backtoback</div><div style="margin: 0px;">/gate/source/rodsource1/gps/particle gamma </div><div style="margin: 0px;">/gate/source/rodsource1/gps/energytype Mono</div><div style="margin: 0px;">/gate/source/rodsource1/gps/monoenergy 0.511 MeV</div><div style="margin: 0px;">/gate/source/rodsource1/gps/type Volume </div><div style="margin: 0px;">/gate/source/rodsource1/gps/shape Cylinder</div><div style="margin: 0px;">/gate/source/rodsource1/gps/radius 0.5 mm</div><div style="margin: 0px;">/gate/source/rodsource1/gps/halfz 25.0 mm</div> <div style="margin: 0px;">/gate/source/rodsource1/gps/centre {rod1Xposition} 0. 0. mm</div><div style="margin: 0px;">/gate/source/rodsource1/gps/angtype iso</div><div style="margin: 0px;">/gate/source/rodsource1/gps/confine rod1_P </div><div style="margin: 0px; min-height: 14px;"><br></div><div style="margin: 0px; min-height: 14px;"><br></div> </blockquote></div><br><div> <span style="border-collapse: separate; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px;"> <div><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;">Joon Young Suk</span></span></font></div><div><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;">Brain Research Centre </span></span></font></div><div style="font-size: 12px;"><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;">Dept. of Physics,</span></span></font></div><div style="font-size: 12px;"><font size="3"> <span style="font-size: 12px;"><span style="font-size: 12px;">University of British Columbia</span></span></font></div><div><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;">2211 Wesbrook Mall</span> </span></font></div><div><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;">Vancouver, British Columbia</span></span></font></div><div><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;"> Canada, V6T 2B5</span></span></font></div><div><font size="3"><span style="font-size: 12px;"><br></span></font></div><div><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;"><a href="mailto:joon@physics.ubc.ca" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> joon@physics.ubc.ca</a></span></span></font></div><div><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;"><a href="mailto:joonyoung.suk@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> joonyoung.suk@gmail.com</a></span></span></font></div><div><font size="3"><span style="font-size: 12px;"><br></span></font></div><div><font size="3"><span style="font-size: 12px;"><span style="font-size: 12px;"><a href="http://www.joonyoung.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> http://www.joonyoung.net</a></span></span></font></div><div><br></div><div><br></div><br></span> </div><br></blockquote></div><br></div><br>_______________________________________________<br>Gate-users mailing list<br><a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:Gate-users@lists.healthgrid.org"> Gate-users@lists.healthgrid.org</a><br><a onclick="return top.js.OpenExtLink(window,event,this)" href="http://lists.healthgrid.org/mailman/listinfo/gate-users" target="_blank">http://lists.healthgrid.org/mailman/listinfo/gate-users </a><br><br></blockquote></div><br></blockquote></div><br></div></body></html>