<html><head></head><body><div class="ydpff0c428cyahoo-style-wrap" style="font-family:courier new, courier, monaco, monospace, sans-serif;font-size:13px;"><div><div dir="ltr" data-setdir="false">Hello there,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">If you have a limited window (let's say 159 keV, 10%), you may limit your result to scatter and unscattered photons of this energy. If you are using root you may set comptonPhantom==0 or !=0, as a parameter.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Does that help?</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Kind Regards,</div><div dir="ltr" data-setdir="false">Konstantinos</div><div dir="ltr" data-setdir="false"><br></div><div><br></div><div class="ydpff0c428csignature"><div style="font-family:courier, monaco, monospace, sans-serif;font-size:13px;"><div style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;" dir="ltr" data-setdir="false"> <div><div>--</div><div>--</div><div>Konstantinos CHATZIPAPAS | PhD, CNRS | "Interactions Rayonnements Ionisants & Biologie" (iRiBio)</div><div>Centre d'Etudes Nucléaires de Bordeaux-Gradignan - UMR 5797</div><div>https://www.cenbg.in2p3.fr/</div></div><br></div><div style="color:rgb(0, 0, 0);font-family:Arial;font-size:16px;font-style:normal;font-weight:normal;letter-spacing:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;"></div></div></div></div>
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Στις Πέμπτη, 3 Μαρτίου 2022, 06:07:00 μ.μ. CET, ο χρήστης Larry Pierce <lapierce@uw.edu> έγραψε:
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<div><div dir="ltr">Dear GATE users, <br></div><div dir="ltr"><br></div><div dir="ltr">I have a question regarding simulation of I-123, with 83% of the emission photons at 159 keV used for imaging. It also has 3% of the photons emitted being higher-energy up to 784 keV and these can contaminate the data and reconstructed image. <br></div><div dir="ltr"><br></div><div dir="ltr">When simulating our SPECT detector, I would like to know the energy of the original photon to determine if it was an “imaging photon” or a “higher-energy photon” that led to the hit or single in the detector. <br></div><div dir="ltr"><br></div><div dir="ltr">Does anyone know of a way to do this in GATE?<br></div><div dir="ltr"><br></div><div dir="ltr">I have considered that we may use multiple overlapping spectrum sources with a mixture of imaging and high-energy photons and that the output source ID can then tell us if the originating photon was an imaging photon or a high-energy photon. <br></div><div dir="ltr"><br></div><div dir="ltr">Still, I would like to ask the group for their input if there are other better ways to approach the issue. <br></div><div dir="ltr"><br></div><div dir="ltr">Thank you for your consideration, <br></div><div dir="ltr"><br></div><div dir="ltr">-Larry Pierce<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">Gate-users mailing list<br></div><div dir="ltr"><a ymailto="mailto:Gate-users@lists.opengatecollaboration.org" href="mailto:Gate-users@lists.opengatecollaboration.org">Gate-users@lists.opengatecollaboration.org</a><br></div><div dir="ltr"><a href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users" target="_blank">http://lists.opengatecollaboration.org/mailman/listinfo/gate-users</a></div></div>
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