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Hi Larry,
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<span class="">indeed, the documentation on the phase space actor does not list all available flags. I had a look at the source code, more specifically, the </span><a href="http://GatePhaseSpaceActorMessenger.cc" class="">GatePhaseSpaceActorMessenger.cc</a> file.
Here, you will find the available flags along with a short description. For “enablePrimaryEnergy”, it says: "Store the energy of the primary particle for every hit.”
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<div class="">You might find other flags in the source code file that help you to complete your task.<br class="">
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</span><span class="">Best regards,<br class="">
</span><span class="">David<br class="">
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<div class="">On 8 Mar2022, at 19:53, Larry Pierce <<a href="mailto:lapierce@uw.edu" class="">lapierce@uw.edu</a>> wrote:</div>
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Thanks David, I do not see any documentation for “enablePrimaryEnergy”, can you provide a description or link to documentation?
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<div class="">Thanks,</div>
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<div class="">-Larry</div>
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<div class="">On Mar 7, 2022, at 1:31 AM, David Leibold <<a href="mailto:D.Leibold@tudelft.nl" class="">D.Leibold@tudelft.nl</a>> wrote:</div>
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Hi Larry,
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<div class="">if I am not mistaken, the parentID is 0 if the current particle was emitted by the source; if the current particle is a secondary particle, then the parentID will store the parent track’s event ID. I am not sure whether this is of much help when
you detect your particles with a realistic detector material, though, since the secondaries might be created inside the detector itself.</div>
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<div class="">If you want to use a phase space actor instead, you can use the setting “enablePrimaryEnergy”, which stores the energy of the primary particle for every hit.</div>
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<div class="">Kind regards,</div>
<div class="">David Leibold</div>
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<div class="">On 3 Mar2022, at 19:26, Larry Pierce <<a href="mailto:lapierce@uw.edu" class="">lapierce@uw.edu</a>> wrote:</div>
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No, I have not. Can you tell me what informationis in parentID ? Does that tell the originating particle (I-123) or the originating photon energy?</div>
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Thanks,</div>
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-Larry</div>
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<blockquote type="cite" class="">On Mar 3, 2022, at 10:12 AM, Konstantinos P. Chatzipapas <<a href="mailto:konhat88@yahoo.gr" class="">konhat88@yahoo.gr</a>> wrote:<br class="">
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<div dir="ltr" data-setdir="false" class="">Have you try to filter hits using ParentID leaf?</div>
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<div dir="ltr" data-setdir="false" class="">Konstantinos</div>
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<div class="">Στις Πέμπτη, 3 Μαρτίου 2022, 06:40:49 μ.μ. CET, ο χρήστης Larry Pierce <<a href="mailto:lapierce@uw.edu" class="">lapierce@uw.edu</a>> έγραψε:</div>
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<div class="">Yes, I see, thank you!
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<div class="yiv6532262222">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="yiv6532262222">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="yiv6532262222">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="yiv6532262222">Thanks for the advice!</div>
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<div class="yiv6532262222">-Larry Pierce</div>
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<div class="yiv6532262222">On Mar 3, 2022, at 9:27 AM, Konstantinos P. Chatzipapas <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:konhat88@yahoo.gr" target="_blank" href="mailto:konhat88@yahoo.gr" class="yiv6532262222">konhat88@yahoo.gr</a>>
wrote:</div>
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<div dir="ltr" class="yiv6532262222">Hello there,</div>
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<div dir="ltr" class="yiv6532262222">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" class="yiv6532262222">Does that help?</div>
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<div dir="ltr" class="yiv6532262222">Kind Regards,</div>
<div dir="ltr" class="yiv6532262222">Konstantinos</div>
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<div class="yiv6532262222">Konstantinos CHATZIPAPAS | PhD, CNRS | "Interactions Rayonnements Ionisants & Biologie" (iRiBio)</div>
<div class="yiv6532262222">Centre d'Etudes Nucléaires de Bordeaux-Gradignan - UMR 5797</div>
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<div class="yiv6532262222">Στις Πέμπτη, 3 Μαρτίου 2022, 06:07:00 μ.μ. CET, ο χρήστης Larry Pierce <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:lapierce@uw.edu" target="_blank" href="mailto:lapierce@uw.edu" class="yiv6532262222">lapierce@uw.edu</a>>
έγραψε:<span class="Apple-converted-space"> </span></div>
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<div dir="ltr" class="yiv6532262222">Dear GATE users,<span class="Apple-converted-space"> </span><br clear="none" class="yiv6532262222">
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<div dir="ltr" class="yiv6532262222">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.<span class="Apple-converted-space"> </span><br clear="none" class="yiv6532262222">
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<div dir="ltr" class="yiv6532262222">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.<span class="Apple-converted-space"> </span><br clear="none" class="yiv6532262222">
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<div dir="ltr" class="yiv6532262222">Does anyone know of a way to do this in GATE?<br clear="none" class="yiv6532262222">
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<div dir="ltr" class="yiv6532262222">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.<span class="Apple-converted-space"> </span><br clear="none" class="yiv6532262222">
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<div dir="ltr" class="yiv6532262222">Still, I would like to ask the group for their input if there are other better ways to approach the issue.<span class="Apple-converted-space"> </span><br clear="none" class="yiv6532262222">
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<div dir="ltr" class="yiv6532262222">Thank you for your consideration,<span class="Apple-converted-space"> </span><br clear="none" class="yiv6532262222">
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<div dir="ltr" class="yiv6532262222">-Larry Pierce<br clear="none" class="yiv6532262222">
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<div dir="ltr" class="yiv6532262222">_______________________________________________<br clear="none" class="yiv6532262222">
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