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Yes, I see, thank you!
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<div class="">However, there may be scattered imaging photons in the window as well as scattered high-energy photons in the window. </div>
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<div class="">I want to know the fraction of imaging photons and high-energy photons that contributed to the window. </div>
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<div class="">If there is a way to know this for each hit or single, that would be a great help. </div>
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<div class="">Thanks for the advice!</div>
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<div class="">-Larry Pierce</div>
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<div class="">On Mar 3, 2022, at 9:27 AM, Konstantinos P. Chatzipapas <<a href="mailto:konhat88@yahoo.gr" class="">konhat88@yahoo.gr</a>> wrote:</div>
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<div dir="ltr" data-setdir="false" class="">Hello there,</div>
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<div dir="ltr" data-setdir="false" class="">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>
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<div dir="ltr" data-setdir="false" class="">Does that help?</div>
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<div dir="ltr" data-setdir="false" class="">Kind Regards,</div>
<div dir="ltr" data-setdir="false" class="">Konstantinos</div>
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<div class="">Konstantinos CHATZIPAPAS | PhD, CNRS | "Interactions Rayonnements Ionisants & Biologie" (iRiBio)</div>
<div class="">Centre d'Etudes Nucléaires de Bordeaux-Gradignan - UMR 5797</div>
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<div class="">Στις Πέμπτη, 3 Μαρτίου 2022, 06:07:00 μ.μ. CET, ο χρήστης Larry Pierce <<a href="mailto:lapierce@uw.edu" class="">lapierce@uw.edu</a>> έγραψε:
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<div dir="ltr" class="">Dear GATE users, <br class="">
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<div dir="ltr" class="">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
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<div dir="ltr" class="">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.
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<div dir="ltr" class="">Does anyone know of a way to do this in GATE?<br class="">
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<div dir="ltr" class="">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
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<div dir="ltr" class="">Still, I would like to ask the group for their input if there are other better ways to approach the issue.
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<div dir="ltr" class="">Thank you for your consideration, <br class="">
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<div dir="ltr" class="">-Larry Pierce<br class="">
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<div dir="ltr" class="">_______________________________________________<br class="">
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