[Gate-users] Problème dans les résultats de Gate

[mariam zoubair]

Dear Gate users
I voxelize a phantom from a CT image, I started with a slice thickness of 2mm

 I studied three cases:
- A phantom with material- A phantom without material (filled with air)- No phantom 
 But the problem, I always find the same results even when I increase the thickness to 200. For the first case and the second and the last I find even just the number of photons scattered 0






I compare the simulation results of a cylinder filled with air and without cylinder I found a defference. I do not know why



 

Do you have an explanation for this. 



phantom  and source files:



#      P H A N T O M

 

 

/gate/world/daughters/name HRRT_brain

/gate/world/daughters/insert parameterizedBoxMatrix

/gate/HRRT_brain/geometry/insertReader interfile

/gate/HRRT_brain/interfileReader/insertTranslator
range

/gate/HRRT_brain/interfileReader/rangeTranslator/readTable
range_atten_brain_original.dat

/gate/HRRT_brain/interfileReader/rangeTranslator/describe
1

/gate/HRRT_brain/interfileReader/readFile CT.h33

/gate/HRRT_brain/placement/setTranslation 0. 0. 0.
mm

/gate/HRRT_brain/attachVoxelPhantomSD

/gate/endshielding/attachPhantomSD

/gate/HRRT_brain/verbose 2

 

# Point Source

/gate/source/addSource
F18LineSource

/gate/source/F18LineSource/setActivity
3700000. becquerel

 

/gate/source/F18LineSource/gps/particle
e+ 

/gate/source/F18LineSource/setForcedUnstableFlag
true 

/gate/source/F18LineSource/setForcedHalfLife
6586.2 s

/gate/source/F18LineSource/gps/energytype
Fluor18

/gate/source/F18LineSource/gps/type  Point 

/gate/source/F18LineSource/gps/angtype
iso

/gate/source/F18LineSource/gps/centre
0. 0. 0. mm

/gate/source/F18LineSource/dump
1

#/gate/source/F18LineSource/visualize
2000 red 5 

 

/gate/source/list

 


Many Thanks 
 
 
 
 
 
 
 






 

 		 	   		   		 	   		   		 	   		   		 	   		   		 	   		  
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