[Gate-users] (no subject)

[lupa euy]

Hi everyone, 


I want to learn more about interpreting the root file.. 


I am running a PET simulation with 6 point sources.. 

below is the macro file. 



/gate/run/initialize

/gate/source/addSource sphere1
/gate/source/sphere1/setActivity 125000. Bq
/gate/source/sphere1/gps/centre 0.0 10.0 0.0 mm
/gate/source/sphere1/gps/particle e+
/gate/source/sphere1/gps/energytype Mono
/gate/source/sphere1/gps/monoenergy 511. keV
/gate/source/sphere1/gps/type Volume
#/gate/source/sphere1/gps/shape Sphere
#/gate/source/sphere1/gps/radius 1.25 mm
/gate/source/sphere1/gps/shape Cylinder
/gate/source/sphere1/gps/radius 0.5 mm
/gate/source/sphere1/gps/halfz 0.5 mm
/gate/source/sphere1/gps/angtype iso
#/gate/source/sphere1/gps/attachto phantom

/gate/source/addSource sphere2
/gate/source/sphere2/setActivity 125000. Bq
/gate/source/sphere2/gps/centre 100.0 0.0 0.0 mm
/gate/source/sphere2/gps/particle e+
/gate/source/sphere2/gps/energytype Mono
/gate/source/sphere2/gps/monoenergy 511. keV
/gate/source/sphere2/gps/type Volume
#/gate/source/sphere2/gps/shape Sphere
#/gate/source/sphere2/gps/radius 1.25 mm
/gate/source/sphere2/gps/shape Cylinder
/gate/source/sphere2/gps/radius 0.5 mm
/gate/source/sphere2/gps/halfz 0.5 mm
/gate/source/sphere2/gps/angtype iso


/gate/source/addSource sphere3
/gate/source/sphere3/setActivity 125000. Bq
/gate/source/sphere3/gps/centre 0.0 100.0 0.0 mm
/gate/source/sphere3/gps/particle e+
/gate/source/sphere3/gps/energytype Mono
/gate/source/sphere3/gps/monoenergy 511. keV
/gate/source/sphere3/gps/type Volume
#/gate/source/sphere3/gps/shape Sphere
#/gate/source/sphere3/gps/radius 1.25 mm
/gate/source/sphere3/gps/shape Cylinder
/gate/source/sphere3/gps/radius 0.5 mm
/gate/source/sphere3/gps/halfz 0.5 mm
/gate/source/sphere3/gps/angtype iso

/gate/source/addSource sphere4
/gate/source/sphere4/setActivity 125000. Bq
/gate/source/sphere4/gps/centre 0.0 10.0 -65.0 mm
/gate/source/sphere4/gps/particle e+
/gate/source/sphere4/gps/energytype Mono
/gate/source/sphere4/gps/monoenergy 511. keV
/gate/source/sphere4/gps/type Volume
#/gate/source/sphere4/gps/shape Sphere
#/gate/source/sphere4/gps/radius 1.25 mm
/gate/source/sphere4/gps/shape Cylinder
/gate/source/sphere4/gps/radius 0.5 mm
/gate/source/sphere4/gps/halfz 0.5 mm
/gate/source/sphere4/gps/angtype iso

/gate/source/addSource sphere5
/gate/source/sphere5/setActivity 125000. Bq
/gate/source/sphere5/gps/centre 0.0 100.0 -65.0 mm
/gate/source/sphere5/gps/particle e+
/gate/source/sphere5/gps/energytype Mono
/gate/source/sphere5/gps/monoenergy 511. keV
/gate/source/sphere5/gps/type Volume
#/gate/source/sphere5/gps/shape Sphere
#/gate/source/sphere5/gps/radius 1.25 mm
/gate/source/sphere5/gps/shape Cylinder
/gate/source/sphere5/gps/radius 0.5 mm
/gate/source/sphere5/gps/halfz 0.5 mm
/gate/source/sphere5/gps/angtype iso

/gate/source/addSource sphere6
/gate/source/sphere6/setActivity 125000. Bq
/gate/source/sphere6/gps/centre 100.0 0.0 -65.0 mm
/gate/source/sphere6/gps/particle e+
/gate/source/sphere6/gps/energytype Mono
/gate/source/sphere6/gps/monoenergy 511. keV
/gate/source/sphere6/gps/type Volume
#/gate/source/sphere6/gps/shape Sphereh
#/gate/source/sphere6/gps/radius 1.25 mm,
/gate/source/sphere6/gps/shape Cylinder
/gate/source/sphere6/gps/radius 0.5 mm
/gate/source/sphere6/gps/halfz 0.5 mm
/gate/source/sphere6/gps/angtype iso

/gate/source/list

As I observe the root file, I find that some sources seems to have higher dose than the other, while in the declaration I set them to have the same intensity.. 


below/attached  is the pictures of the source position from the root file


Does anybody have any idea why does it behave like this ?? 

regards
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