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

C C phasenew at hotmail.com
Wed Dec 23 16:15:15 CET 2009

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.


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

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,
Visualization verbosity changed to errors (2)
Creating new system based on volume inserter 'SPECThead'	
BooleanProcessor::execute : unknown faces !!!
BooleanProcessor: boolean operation failed
##### 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
# 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

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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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