[Gate-users] Difference of compton scattering in phantom

[JinSu Kim]

Dear Gate users

 

I have simulated the microPET R4 scanner and NEMA like rat phantom (Fig 1)

F-18 source (70 MBq) was simulated for the calculation of scatter component
in the phantom.

Fig 2 (a) was simulated using GATE 3.0 and Fig 2 (b) was simulated using
Gate 4.0

I found that there was some difference in the results using GATE 4.0.

Although activity was the same, entires was quite different (gate 3.0: 958,
gate 4.0: 705222)

 

Simulation code was the same in both GATE code.

Why this difference was occurred? 

 

Best regards

Kim JS

 

F-18 source was below 

/gate/source/addSource fluor18

/gate/source/fluor18/setActivity 70000000 becquerel

/gate/source/fluor18/gps/particle ion

/gate/source/fluor18/gps/ion 9 18 0 0 

/gate/source/fluor18/gps/energytype Mono

/gate/source/fluor18/gps/monoenergy 0. MeV

/gate/source/fluor18/gps/angtype iso

/gate/source/fluor18/gps/number 1

/gate/source/fluor18/gps/centre 0. -1.5  0. cm

/gate/source/fluor18/gps/type Volume

/gate/source/fluor18/gps/shape Cylinder

/gate/source/fluor18/gps/radius 1. mm

/gate/source/fluor18/gps/halfz 7.5 cm

/gate/source/fluor18/setForcedUnstableFlag true

/gate/source/fluor18/setForcedHalfLife 6586 s

 



 

 

 

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