<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none;"></style> </head> <body dir="ltr"> <div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;"> Hi, I'm doing fairly standard PET simulations using GATE but would like to now record the location of the *first interaction* in the crystal, as opposed to the location of the energy centroid or the Winner Takes All location. The documentation seems to suggest there may be other options apart from the default (Winner Takes All?), but it does not indicate any commands. Are there such command options in the digitizer module, or will I need to record the hits file to identify the location of the first interaction? Thanks for any advice, Andre <div id="Signature"> <div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0"> ________________________________ Andre Kyme, PhD Cassen Postdoctoral Fellow Department of Biomedical Engineering University of California, Davis T: +1 (530) 302 6800 E: <a id="LPNoLP" href="mailto:msjudenhofer@ucdavis.edu" target="_blank" class="moz-txt-link-abbreviated"> akyme@ucdavis.edu</a> </div> </div> </div> </body> </html>