<div dir="ltr"><div><div><div><div>Dear Gate Users,<br><br></div>I have designed a SPECT system with collimator, crystal and PMTs. The macro is running smoothly in GATE( with the generation of ascii and root files). The only problem is that I am not able to detect the optical photons at PMT. The Hits.dat file has optical photons generated, but none of them are getting detected. I am using "perfect_apd" (dielectric-metal) boundary between crystal and PMTs. <br>
</div>Please help me in solving out this !!<br><br></div>Thanks,<br></div>Siva.<br></div>