<html><head></head><body><div style="font-family:verdana, helvetica, sans-serif;font-size:16px;"><div>Hello all</div><div><br></div><div>I am a low experienced Gate user and working on CT simulation. I am trying to create a CT scanner. there is a problem in the definition on fan beam source for CT. I need help about the how can I define the CT fan beam.</div><div>Thank you to all who respond to this email.</div><div><br></div><div>Regard,<br></div></div></body></html>