<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.6000.17114" name=GENERATOR></HEAD> <BODY> <DIV><SPAN class=849364405-30102012><FONT face=Arial size=2>Hi,</FONT></SPAN></DIV> <DIV><SPAN class=849364405-30102012><FONT face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=849364405-30102012><FONT face=Arial size=2>I'm interested in simulating CT-dose and have modelled my system and phantom (attempted to import interfile multiple times using multiple programs, but to no avail). Currently I'm a little bit puzzled as to how to correctly use activity in case of a CT. </FONT></SPAN></DIV> <DIV><SPAN class=849364405-30102012><FONT face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=849364405-30102012><FONT face=Arial size=2>The classic example had a preset value of 350000 Bq and so far I have approximated my system to require activity between 10 to 100 times that. I also read that I can input dose in Gy in the activity. Which dose exactly should I input to the system? Is there a way to take into account the mAs-value of a CT?</FONT></SPAN></DIV> <DIV><SPAN class=849364405-30102012><FONT face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=849364405-30102012><FONT face=Arial size=2>Best regards,</FONT></SPAN></DIV> <DIV><SPAN class=849364405-30102012><FONT face=Arial size=2>Jukka</FONT></SPAN></DIV></BODY></HTML>