<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'>Hi Gaters,<br>It was to know if you can simulate a Compton camera with GATE.<br>I'm trying to simulate one, modifying the code of a SPECT, but when I remove the collimator gives me an error.<br>I also tried to modify the code for an optical system, but it does not allow me to make two or more replicas with different materials.<br><br>Thanks in advance, </div></body> </html>