[Gate-users] how to set Rmax & Rmin

[cindy Dong]

Hi,
    I  want to simulate a planar system using Gate.But I don't know how to
set the Rmax and Rmin when I set the cylindricalPET's geometry.
For example,if i want to  change the detector distance from 50mm to
60mm,will i set the Rmin=25mm when i simulate distance=50 & set the Rmin=30
when i simulate distance=60?That is mean,should i change the system's Rmin
everytime if the detector distance changes?OR,i fix the Rmin as a smallest
value?

Thanks
Cindy