<div dir="ltr">Dear Maxime, <div><br></div><div>Thank you so much for taking your precious time to help me and thanks for pointing me to the <a href="https://opengate.readthedocs.io/en/latest/digitizer_and_detector_modeling.html#noise">Noise module</a>. I did read the section carefully. My concern is how accurately this method can simulate Lu-176 decay. What this module does is adding an energy to a detected single photon. Thus it may not create new singles from Lu176 decay. Do I understand it correctly?</div><div><br></div><div>My idea was to add a Lu176 ion source to each LSO crystal. Theoretically, this may give the most accurate simulation. However, I don't know where to find the names of these crystals. As to the complexity, I think I can use Python to write source mac quickly if I have to repeat and modify it for thousands of times. I looked at names present in Scene tree and .wrl files, such as Crystal_phys[0], Crystal_phys, and Crystal_phys.0. None of them were recognized by GATE. I got the following error message: </div><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div><a target="_blank" class="gmail-c-link" href="http://gateobjectstore.cc/" rel="noopener noreferrer" style="box-sizing:inherit;font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(248,248,248)">GateObjectStore.cc</a><span style="color:rgb(29,28,29);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(248,248,248)"> (l.110): The volume 'Crystal_phys.34' cannot be found in the list of volumes. Abort.</span></div><div><span style="color:rgb(29,28,29);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(248,248,248)">Here is the list of available volumes :</span></div><div><span style="color:rgb(29,28,29);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(248,248,248)"> Al_sleeve Al_sleeve_p1 C_sleeve Crystal End_shield NEMA_LP PETscanner Pb_shielding Phan_holder Subblock Subblockin block blockIn head module moduleIn world</span></div><div><span class="gmail-c-mrkdwn__br" style="box-sizing:inherit;display:block;height:8px;color:rgb(29,28,29);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(248,248,248)"></span></div><div><span style="color:rgb(29,28,29);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(248,248,248)">Attached to: 'digitizer'</span></div></blockquote><div><br></div><div>It looks like the repeated crystal volumes do not show up in the list of available volumes. I am curious whether any GATE user knows how to add a source to repeated volumes?</div><div><br></div><div>Thank you very much. </div><div>Have a wonderful day!</div><div><br></div><div><br></div><div>Zhengzhi</div><div><br></div><div><br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jun 11, 2020 at 7:03 AM Maxime Toussaint <<a href="mailto:Maxime.Toussaint@usherbrooke.ca">Maxime.Toussaint@usherbrooke.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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Greetings,</div>
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I have never used it but I have heard one of my colleague say that this could be done with the <i>Noise</i> module of the
<i>Digitizer</i>. <br>
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About your approach, I would guess that the only detector named "Crystal" in your system would be the first one created, the one that is repeated. The ones created by the repeater most likely have an automatic generated name but I have no idea what it is. Even
if you had the name of each one, you would need to add a source to each one which would be complex (I think?).<br>
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Bests,</div>
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Maxime Toussaint</div>
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<div id="gmail-m_6225088014116803782divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>De :</b> Gate-users <<a href="mailto:gate-users-bounces@lists.opengatecollaboration.org" target="_blank">gate-users-bounces@lists.opengatecollaboration.org</a>> de la part de Albert Grace Lieu <<a href="mailto:albertnew2018@gmail.com" target="_blank">albertnew2018@gmail.com</a>><br>
<b>Envoyé :</b> 11 juin 2020 01:09<br>
<b>À :</b> gate-users <<a href="mailto:gate-users@lists.opengatecollaboration.org" target="_blank">gate-users@lists.opengatecollaboration.org</a>><br>
<b>Cc :</b> Peter Olcott <<a href="mailto:polcott@reflexion.com" target="_blank">polcott@reflexion.com</a>><br>
<b>Objet :</b> [Gate-users] How to simulate Lu-176 in LSO crystal</font>
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<div dir="ltr">Dear Gate users and developers,
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<div>There are a couple of papers [<a href="https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Faapm.onlinelibrary.wiley.com%2Fdoi%2Fabs%2F10.1118%2F1.4824694&data=02%7C01%7Cmaxime.toussaint%40usherbrooke.ca%7C5a63bc4be9ae4335ee9008d80dc5af21%7C3a5a8744593545f99423b32c3a5de082%7C0%7C0%7C637274490000985547&sdata=z25mHQ3vAeaiCVrSk%2BHuajOruDFHzil61wO6v5uptPE%3D&reserved=0" target="_blank">1</a>,<a href="https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F5751205&data=02%7C01%7Cmaxime.toussaint%40usherbrooke.ca%7C5a63bc4be9ae4335ee9008d80dc5af21%7C3a5a8744593545f99423b32c3a5de082%7C0%7C0%7C637274490000995545&sdata=fGxaotiPFDWbMjYO9uyoQVV%2BgIhTi%2BKLBvaHH3aau6k%3D&reserved=0" target="_blank">2</a>]
addressing the importance of adding the simulation of Lu-176 in Lutetium based crystal in GATE simulation. I try to do this to my simulated PET system that has thousands of pieces of crystals (created with linear and cubic array repeater). My general idea
of implementing this is to create a Lu176 ion source and then attach it to my crystals. However, when I do:</div>
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<div>/gate/source/Lu176/attachTo Crystal </div>
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<div>the Lu176 is only attached to a single piece of crystal (which can be visualized with /gate/source/Lu176/visualize 1000 red 3). Has anyone implemented this before? Could you please share your thoughts?</div>
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<div>Thanks a lot. Greatly appreciated. </div>
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<div>Zhengzhi </div>
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