<html><head><style>p{margin-top:0px;margin-bottom:0px;}</style></head><body><div style="font-size:10pt; font-family:Gulim, sans-serif;"><p style="font-family: 돋움, Dotum, Helvetica, "Apple SD Gothic Neo", sans-serif; font-size: 12px;">Dear gate users,</p><p style="font-family: 돋움, Dotum, Helvetica, "Apple SD Gothic Neo", sans-serif; font-size: 12px;"> </p><p style="font-family: 돋움, Dotum, Helvetica, "Apple SD Gothic Neo", sans-serif; font-size: 12px;"><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif">Hello, </font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;">I'm working on a GATE optical simulation.</span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;">I wonder what the 'time' in the 'Hit file' contained in the ASCII file is.</span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;">It is documented as a time stamp in the GATE user guide. But I don't know the exact meaning.</span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;">1. Time when gamma rays are converted to optical photons</span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;">2. Time at which the optical photon is finally absorbed</span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;">Which of the above numbers corresponds to 'time'?</span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;"><br></span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;">If not 2, how do I know when the optical photon is being absorbed by the sensor plane?</span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;"><br></span></font></p><p style=""><font face="돋움, Dotum, Helvetica, Apple SD Gothic Neo, sans-serif"><span style="font-size: 12px;">And can you explain single and hit using gamma rays and optical photons as examples?</span></font></p><div style="font-family: 돋움, Dotum, Helvetica, "Apple SD Gothic Neo", sans-serif; font-size: 12px;"><br></div><div style="font-family: 돋움, Dotum, Helvetica, "Apple SD Gothic Neo", sans-serif; font-size: 12px;">Thanks^^</div><div style="font-family: 돋움, Dotum, Helvetica, "Apple SD Gothic Neo", sans-serif; font-size: 12px;">Best regards</div><div style="font-family: 돋움, Dotum, Helvetica, "Apple SD Gothic Neo", sans-serif; font-size: 12px;"><br></div><div style="font-family: 돋움, Dotum, Helvetica, "Apple SD Gothic Neo", sans-serif; font-size: 12px;">Su hwan Kim</div></div></body></html><table style='display:none'><tr><td><img src="https://mail.naver.com/readReceipt/notify/?img=ClY9FAicbrn9hAn%2FFqudax0CFou%2FMrtXpAbwpourazKXF4twF6uqKrFSFoK9tzFXp6UmKAE5W4d5W4pZMLlGWq%2FsprJdpL99brkZbdIn1BFdbZlTbzk5prJdp6FTWzwCM4eZMB3GWr%2F5WXiN.gif" border="0"/></td></tr></table>