[Gate-users] problem with high random rate

[dounia84 at aol.com]

Hello dear Gaters,
 
 
I am using GATE v5 on Fedora and I want to create a phantom uniformely filled with water and F18. So I called the CylinderF18 model source and filled it with the apropriate activity. I am doing counts rates study and the number of prompt is much larger than in my experiment. the volume of this cylinder is approximatively 5 L encapsulated in an empty plexiglass cylinder. I analyze random trues and prompts with the (modified) program benchmarkPET.C. Now I have a doubt about the activity, should put it in MBq/mL or MBq only?
Another point about benchmarkPET.C , in the loop where coincidences are sorted one can find runID=0 or runID=1> Do you know what these runs mean? 
 
Thank you for any help.
Cheers
 
-- 
Dounia Taleb
Imagerie medicale experimentale - Département de physique
Université de Liège - Institut de Physique, B5
B-4000 Liège 1 (Sart-Tilman) - Belgique
Tel: +32-4-3663152