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<p style="margin-top:0;margin-bottom:0">Dear All,</p>
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<p style="margin-top:0;margin-bottom:0">We are trying to simulate TakeEnergyCentroid policy for our PET scanner.</p>
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<p style="margin-top:0;margin-bottom:0">Compared to the TakeEnergyWinner, acceptance ratio is quite low. I would like to find the cause for this. We estimate that our system's energy policy is similar to TakeEnergyCentroid. However, TakeEnergyWinner of Gate
implementation seems to be producing more logical results when setting an energy threshold. </p>
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<p style="margin-top:0;margin-bottom:0">I explain the phenomenon as below. If somebody have an explanation, please let us know. Alternatively, you can point to the code block in Gate for calculating the combined energy and setting the threshold for TakeEnergyCentroid.
I can check from the algorithm.<br>
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<p style="margin-top:0;margin-bottom:0">Example case (I hope images go through email):
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<p style="margin-top:0;margin-bottom:0">Here is some hits data. TakeEnergyWinner accepts this although the individual energies (edep) are low.</p>
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<p style="margin-top:0;margin-bottom:0"><img style="width:9.427in;height:.6354in" id="m_5717291549903818838Picture_x0020_3" class="CToWUd" tabindex="0" width="905" height="61" src="https://mail.google.com/mail/u/0?ui=2&ik=ecbe7978ce&attid=0.1&permmsgid=msg-f:1628638442309858250&th=169a1608cd6cb3ca&view=fimg&sz=s0-l75-ft&attbid=ANGjdJ8JB6NxadTKIx00e0Q2Z864Yro7Agj13sbDytry-Sv--Jpo4SjMn65AaiGsrB6tXInSySQAegh_afDLYr6gTRiknqkO7eobLK4Alu7QrkHKYXV2KX6V7auBi_Y&disp=emb"></p>
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<p style="margin-top:0;margin-bottom:0">Here is the <span>TakeEnergyWinner </span>
singles data:</p>
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<p style="margin-top:0;margin-bottom:0"><img style="width:7.3437in;height:.427in" id="m_3623711216074826473Picture_x0020_4" class="CToWUd" width="705" height="41" src="https://mail.google.com/mail/u/0?ui=2&ik=ecbe7978ce&attid=0.2&permmsgid=msg-f:1628638442309858250&th=169a1608cd6cb3ca&view=fimg&sz=s0-l75-ft&attbid=ANGjdJ8HhZiuDCxs9swq45xKRrcH_JsjZ0DRu89df_zjd_ALH9G9QXjivRuQttOhGJMZGXJmDF9WNQjg3fZOABuf8k7onLcY6bSkP2684Cz8WurCmAsnW5A0cgm6-RQ&disp=emb"></p>
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<p style="margin-top:0;margin-bottom:0">Here, Hits data for the TakeEnergyCentroid simulation</p>
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<p style="margin-top:0;margin-bottom:0"><img style="width:8.677in;height:.6354in" id="m_3623711216074826473Picture_x0020_5" class="CToWUd" width="833" height="61" src="https://mail.google.com/mail/u/0?ui=2&ik=ecbe7978ce&attid=0.3&permmsgid=msg-f:1628638442309858250&th=169a1608cd6cb3ca&view=fimg&sz=s0-l75-ft&attbid=ANGjdJ8MoTuEG-vMKOtPTPyHVOZjftYN72QXRvlFE20y291jlJ2V1ZQF3zL-mYRE47oZRL5u-YMxE5Mc9GXy4CUZZAoxKgdqfYxJgSScM6WehPlLccFPoN44YvP9qWM&disp=emb"></p>
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<p style="margin-top:0;margin-bottom:0">This event is not accepted, although energy is the same level:</p>
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<p style="margin-top:0;margin-bottom:0"><img style="width:7.7291in;height:.6354in" id="m_3623711216074826473Picture_x0020_7" class="CToWUd" width="742" height="61" src="https://mail.google.com/mail/u/0?ui=2&ik=ecbe7978ce&attid=0.4&permmsgid=msg-f:1628638442309858250&th=169a1608cd6cb3ca&view=fimg&sz=s0-l75-ft&attbid=ANGjdJ9iOX2sg-8XAXvnahrnBuD2z-3f_uGkg1ZLHn9GnrMvGYgfEHBCxIJeBvnb2U1rXKFh09l3O-Yv75o7qhvBF5rqaF5Fok2j-AJIdPUxTd4tnG_3yJ8qHCXgoI8&disp=emb"></p>
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<p style="margin-top:0;margin-bottom:0">I have this situation throughout the list. It provides about 2/3 of singles and 1/2 of coincidences.
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<p style="margin-top:0;margin-bottom:0">Best Regards<br>
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<p style="margin-top:0;margin-bottom:0">Kutalmis Akpinar</p>
<p style="margin-top:0;margin-bottom:0">Univ of Central Florida</p>
<p style="margin-top:0;margin-bottom:0">Computer Science, PhD candidate<br>
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