[Gate-users] Gantry/envirnment scatter

[Nicolas GUIGNARD]

Hello Gate users
Happy new year!!!
I am working on GATE based analysis of scatter events of small animal PET.
I could get the object and detector scatter separately and realised that
the object scatter (Number of Compton interactions in phantoms before
reaching the detector) consist of object and gantry/environment scatter.
Pls correct if I am wrong.
If this is true then how can I get the object scatter and
  gantry/environment scatter separately ???

Best regards
Nicolas