[Gate-users] voxelized a phantom

mariam zoubair zoubair-mariam at hotmail.fr
Mon Mar 25 20:30:18 CET 2013 

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

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 deference  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/insertTranslatorrange

/gate/HRRT_brain/interfileReader/rangeTranslator/read  Tablerange_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/list


Many Thanks 

 
 
 
 
 
 
 
 






 



> From: gate-users-request at lists.opengatecollaboration.org
> Subject: Gate-users Digest, Vol 82, Issue 39
> To: gate-users at lists.opengatecollaboration.org
> Date: Mon, 25 Mar 2013 18:01:19 +0100
> 
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> Today's Topics:
> 
>    1. Probl?me dans les r?sultats de Gate (mariam zoubair)
>    2. Probl?me dans les r?sultats de Gate (mariam zoubair)
>    3. Probl?me dans les r?sultats de Gate (mariam zoubair)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 25 Mar 2013 14:37:24 +0000
> From: mariam zoubair <zoubair-mariam at hotmail.fr>
> To: "gate-users at lists.opengatecollaboration.org"
> 	<gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] Probl?me dans les r?sultats de Gate
> Message-ID: <DUB118-W229785AABE318D865BD6DBF4D70 at phx.gbl>
> Content-Type: text/plain; charset="windows-1252"
> 
> 
> 
> 
> 
> 
> Dear Gate users
> 
> Je voxelize un fant?me
> ? partir d?une image CT, j?ai commenc? avec une tanche d?une ?paisseur 2mm pour
> ester Gate
> 
>  J?ai ?tudi? 3 cas :
> 
> 
> -         
> Un fant?me
> avec mat?riau 
> 
> -         
> Un fant?me
> sans mat?riau (remplie par l?air) 
> 
> -         
> Sans fant?me
> 
> 
> 
> Mais le probl?me je trouve toujours m?me 
> r?sultats m?me lorsque j?augmente l??paisseur ? 200.  
>  
> 
> Est-ce que  vous avez une explication
> de cela. 
> 
> 
> 
> Les fichiers de fant?me et source :
> 
> 
> 
> #      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 
>  
>  
>  
>  
>  
>  
>  
> 
> 
> 
> 
> 
> 
>  
> 
>  		 	   		   		 	   		   		 	   		  
> -------------- next part --------------
> An HTML attachment was scrubbed...
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> 
> ------------------------------
> 
> Message: 2
> Date: Mon, 25 Mar 2013 15:03:33 +0000
> From: mariam zoubair <zoubair-mariam at hotmail.fr>
> To: "gate-users at lists.opengatecollaboration.org"
> 	<gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] Probl?me dans les r?sultats de Gate
> Message-ID: <DUB118-W482A8D9DC9C919EC31C65CF4D70 at phx.gbl>
> Content-Type: text/plain; charset="windows-1252"
> 
> Dear Gate users
> 
> 
> Je voxelize un fant?me
> ? partir d?une image CT, j?ai commenc? avec une tanche d?une ?paisseur 2mm pour
> ester Gate
> 
>  J?ai ?tudi? 3 cas :
> 
> 
> -          Un fant?me
> avec mat?riau 
> 
> -         
> Un fant?me
> sans mat?riau (remplie par l?air) 
> 
> -         
> Sans fant?me
> 
> 
> 
> Mais le probl?me je trouve toujours m?me 
> r?sultats m?me lorsque j?augmente l??paisseur ? 200.   Pour le
> premier cas et deuxi?me et pour la derni?re je trouve le m?me juste le nombre des
> photons diffus?s ?gal ? 0 
> 
> Est-ce que  vous avez une explication
> de cela. 
> 
> 
> 
> Les fichiers de fant?me et source :
> 
> 
> 
> #      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 
>  
>  
>  
>  
>  
>  
>  
> 
> 
> 
> 
> 
> 
>  
> 
>  		 	   		   		 	   		   		 	   		   		 	   		  
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20130325/e44455d9/attachment-0001.html>
> 
> ------------------------------
> 
> Message: 3
> Date: Mon, 25 Mar 2013 17:02:25 +0000
> From: mariam zoubair <zoubair-mariam at hotmail.fr>
> To: "gate-users at lists.opengatecollaboration.org"
> 	<gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] Probl?me dans les r?sultats de Gate
> Message-ID: <DUB118-W3914BABC3A38F42D67EA38F4D70 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> 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 
>  
>  
>  
>  
>  
>  
>  
> 
> 
> 
> 
> 
> 
>  
> 
>  		 	   		   		 	   		   		 	   		   		 	   		   		 	   		  
> -------------- next part --------------
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> 
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