[Gate-users] Gate-users Digest, Vol 43, Issue 14

Arda Konik arda-konik at uiowa.edu
Wed Dec 23 17:49:50 CET 2009 

Thanks congwu. I also believe I get reasonable results.  When I change  
the geometry ( enlarge the pinhole, remove collimator etc ) I get  
expected changes in the count results...

arda


On Dec 23, 2009, at 9:15 AM, C C wrote:

>
> Hi, Arda, if I remember correctly, that error is ok now that the  
> simulation continues and gives results. It was said a bug in the  
> older geant4 version and should have been fixed. but I also run into  
> the similar problem with the newest version. You can search the  
> geant4 forums to get a bit more information about this bug about  
> trapezoid.
>
> congwu
>
> From: gate-users-request at lists.healthgrid.org
> Subject: Gate-users Digest, Vol 43, Issue 14
> To: gate-users at lists.healthgrid.org
> Date: Wed, 23 Dec 2009 12:00:02 +0100
>
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> --Forwarded Message Attachment--
> From: arda-konik at uiowa.edu
> To: gate-users at lists.healthgrid.org
> Date: Tue, 22 Dec 2009 10:34:22 -0600
> Subject: [Gate-users] problem with building trpd volume
>
>  Hello,
>
> I am trying to build a trapezoidal shape for the collimator of a SPECT
> system.  Everything looks good when I do the visualization, but I get
> the errors copied below ( last 2 lines repeats ~20 times). After
> that , the simulation works fine and I get the output data...
> Initially I  thought the error was due to the absence of  a " extruded
> box ",  but i get the same error even if I include (i introduced a
> small box to satisfy the boolean operation) the relevant command lines
> as you can see in the
> geometry below..
> I will appreciate any suggestion,
> Thanks,
> Arda
>
> ERROR:
> Visualization verbosity changed to errors (2)
> [GateSystemListManager::CheckScannerAutoCreation:
> Creating new system based on volume inserter 'SPECThead'	
> BooleanProcessor::execute : unknown faces !!!
> BooleanProcessor: boolean operation failed
>
> Geometry:
> ##### single PIN-HOLE COLLIMATOR ######
> /gate/SPECThead/daughters/name collimator
> /gate/SPECThead/daughters/insert trpd
> /gate/collimator/geometry/setX1Length 7.2 cm
> /gate/collimator/geometry/setY1Length 9.6 cm
> /gate/collimator/geometry/setX2Length 4.4 cm
> /gate/collimator/geometry/setY2Length 5.86 cm
> /gate/collimator/geometry/setZLength 1. cm
>
> ### remove a small BOX from TRPD
> /gate/collimator/geometry/setXBoxLength 1. mm
> /gate/collimator/geometry/setYBoxLength 1. mm
> /gate/collimator/geometry/setZBoxLength 1. mm
> /gate/collimator/geometry/setXBoxPos 0. mm
> /gate/collimator/geometry/setYBoxPos 0. mm
> /gate/collimator/geometry/setZBoxPos 0. mm
>
> /gate/collimator/placement/setRotationAxis 0 1 0
> /gate/collimator/placement/setRotationAngle -90 deg
> /gate/collimator/placement/setTranslation  -4.5 0. 0. cm
> /gate/collimator/setMaterial Lead
> /gate/collimator/vis/setColor red
> /gate/collimator/vis/forceWireframe
> /gate/collimator/attachPhantomSD
>
> # Insert the first hole of air in the collimator
> #/gate/collimator/daughters/name hole1
> #/gate/collimator/daughters/insert cone
> #/gate/hole1/geometry/setRmax1 0.15 cm
> #/gate/hole1/geometry/setRmax2 0.6 cm
> #/gate/hole1/geometry/setHeight 0.665 cm
> #/gate/hole1/placement/setRotationAxis 0 0 1
> #/gate/hole1/placement/setRotationAngle -90 deg
> #/gate/hole1/placement/setTranslation  0. 0. 0.1775 cm
> #/gate/hole1/setMaterial Air
> #/gate/hole1/vis/setColor white
>
> # Insert the second hole of air in the collimator
> #/gate/collimator/daughters/name hole2
> #/gate/collimator/daughters/insert cone
> #/gate/hole2/geometry/setRmax1 0.3 cm
> #/gate/hole2/geometry/setRmax2 0.15 cm
> #/gate/hole2/geometry/setHeight 0.335 cm
> #/gate/hole2/placement/setRotationAxis 0 0 1
> #/gate/hole2/placement/setRotationAngle 180 deg
> #/gate/hole2/placement/setTranslation  0. 0. -0.3325 cm
> #/gate/hole2/setMaterial Air
> #/gate/hole2/vis/setColor white
>
>
>
>
> --Forwarded Message Attachment--
> From: yannick.legre at healthgrid.org
> To: gate-devel at lists.healthgrid.org; gate-users at lists.healthgrid.org
> Date: Tue, 22 Dec 2009 21:30:13 +0100
> Subject: [Gate-users] Change in services - downtime  expected
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