<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">Greetings,</span>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<br>
</div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
I am not sure what you want exactly, <span style="margin:0px">but one of the step would be to extract/save the arrival time of the scintillation photons. Did you follow the steps described in [1]? If you look into your root file, the optical branch is empty
which should not be the case.</span></div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin:0px"><br>
</span></div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin:0px">After that, you will need to use the arrival time of the scintillation photons to estimate the arrival time of the annihilation photon. With a quick look at the documentation, it seems that you could use the digitizer to do that part.</span></div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin:0px"><br>
</span></div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin:0px">Note: I have simulated optical photons once in my life. Thus, my suggestions might be invalid/wrong.</span></div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin:0px"><br>
</span></div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin:0px">Bests,</span></div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin:0px">Maxime Toussaint</span></div>
<div style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin:0px"><br>
</span></div>
<span style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"><span style="margin:0px">[1] <a href="https://opengate.readthedocs.io/en/latest/generating_and_tracking_optical_photons.html?highlight=optical%20photon#optical-system" style="margin:0px">https://opengate.readthedocs.io/en/latest/generating_and_tracking_optical_photons.html?highlight=optical%20photon#optical-system</a></span></span><br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style="margin: 0px; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"><br>
</span></div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>De :</b> Gate-users <gate-users-bounces@lists.opengatecollaboration.org> de la part de Amir Beheshti <amir_be2002@yahoo.com><br>
<b>Envoyé :</b> 17 décembre 2021 02:59<br>
<b>À :</b> gate-users@lists.opengatecollaboration.org <gate-users@lists.opengatecollaboration.org><br>
<b>Objet :</b> [Gate-users] problem with time resolution in optical photon simulation</font>
<div> </div>
</div>
<div>
<div class="x_yahoo-style-wrap" style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif; font-size:13px">
<div dir="ltr">Dear Gate users,</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">
<div dir="ltr"><span style="color:rgb(34,34,34); font-family:Arial,Helvetica,sans-serif; font-size:small">I have a mac file which aim is to calculate the time resolution of LYSO crystal in various models for example different surfaces and reflectors. At this
point, I don't know how to extract specific data of the time resolution of crystals. Would you please help me how I could calculate time resolution? I send mac files as attachments.</span><br style="color:rgb(34,34,34); font-family:Arial,Helvetica,sans-serif; font-size:small">
<span style="color:rgb(34,34,34); font-family:Arial,Helvetica,sans-serif; font-size:small">My simulation includes two
<span><span style="color:rgb(34,34,34); font-family:Arial,Helvetica,sans-serif; font-size:small">LYSO</span></span> crystals and a point source of 511 kev at the center between them.</span></div>
<br>
</div>
<div dir="ltr">Thanks a lot</div>
</div>
</div>
</body>
</html>