<div class="iw_mail" dir="rtl" style="font-size: 13px;"><div dir="ltr"><br></div><div dir="ltr">Dear GATE experts,</div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">My name is Maryam Darami, a MSc student of medical physics at the Tabriz university of medical science, Tabriz, Iran.</div><p dir="ltr">I'm a beginner in vGATE 8.1 and I have tendency to work on PET system simulation, while I have no experience in this context! </p><p dir="ltr">I desire to simulate a LYSO crystal coupled with SiPM array, but I have some questions.</p><p><br></p><p dir="ltr">For example: </p><p dir="ltr">1. What kind of changes to the digitizer mac file do I need to simulate the SiPM array instead of PMT? </p><p dir="ltr">2. Do I have to use optical simulation to simulate it?</p><p dir="ltr">3. If I should use it, how can I run optical simulation in vGATE 8.1?</p><p><br></p><p dir="ltr">I would be most grateful if you help me about that. I look forward to hearing from you.</p><p><br></p><p dir="ltr">Best regards, </p><p dir="ltr">Maryam Darami</p></div>