<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_1_1453363820607_2497" dir="ltr"><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2556" class="">Dear Gaters,</span><br style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2558" class=""><br style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2560" class=""><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2562" class="">Does anybody has any experience of tracking optical photons (generated </span><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2564" class="">in crystal and detected by avalanche photodiodes) in SPECT (or PET) imaging in order to </span><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2566" class="">calculate energy resolution of the scanner? If so, I would greatly </span><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2568" class="">appreciate it, if you kindly share your experiences.</span><br style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2570" class=""><br style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2572" class=""><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2574" class="">Thank you in advance,</span><br style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2576" class=""><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px;" id="yui_3_16_0_1_1453363820607_2578" class="">Hojjat</span><span></span></div><div></div><div id="yui_3_16_0_1_1453363820607_2496"> </div><div class="signature" id="yui_3_16_0_1_1453363820607_2492"><div id="yui_3_16_0_1_1453363820607_2491"><br></div><div id="yui_3_16_0_1_1453363820607_2595"><div id="yui_3_16_0_1_1453363820607_2602"><br></div><u style="color:rgb(34, 34, 34);font-family:arial, helvetica, sans-serif;font-size:small;background-color:rgb(255, 255, 255);"></u></div></div></div></body></html>