[Gate-users] Inhomogeneous activity concentration in a cylindrical phantom without using Voxelized Source ?

[Arda Konik]

Hi,
I need to do PET simulations of a cylindrical phantom with  
inhomogeneous activity concentration ( 5-10% variation from a mean  
concentration value).
Is there a way of doing this without using voxelized source ?
I am thinking of a random generator attached to the activity value but  
I dont know if that is possible within GATE.

  Thanks for any suggestion,

  Arda