[Gate-users] [GATE-users] PET system consisting of several rsector

김연경 dusrud026 at gmail.com
Mon Jun 17 13:47:25 CEST 2019


Dear GATE users,

I designed a cylindricalPET consisting of two rsector.

If there is more than one rsector in a geometry, it seems that the
coincidence count is not calculated correctly. Therefore, the test
simulation was carried out by varying the number of rsector constituting
the cylindrical PET.

As a result, the coincidence counting rate of cylindericalPET with one
rsector was estimated to be twice that the coincidence counting rate of
cylindricalPET with two sectors.

I want to know if it is a problem with the digitizer part or if I have to
get an error in GATE.

Please let me know if you have any sample code or documentation that can
resolve this problem.

I attach the code for cylindericalPET.



########geometry###########

/gate/world/daughters/name cylindricalPET

/gate/world/daughters/insert cylinder

/gate/cylindricalPET/placement/setTranslation 0.0 0.0 0.0 cm

/gate/cylindricalPET/geometry/setRmax 160 mm

/gate/cylindricalPET/geometry/setRmin 138.5 mm

/gate/cylindricalPET/geometry/setHeight 232.8 mm

/gate/cylindricalPET/setMaterial Air

/gate/cylindricalPET/vis/setVisible 0



/gate/cylindricalPET/daughters/name rsector

/gate/cylindricalPET/daughters/insert box

/gate/rsector/placement/setTranslation 146 0.0 0. mm

/gate/rsector/geometry/setXLength 15.0 mm

/gate/rsector/geometry/setYLength 25.8 mm

/gate/rsector/geometry/setZLength 129 mm

/gate/rsector/setMaterial Air

/gate/rsector/vis/setColor red

/gate/rsector/vis/setVisible 0



/gate/cylindricalPET/daughters/name rsector1

/gate/cylindricalPET/daughters/insert box

/gate/rsector1/placement/setTranslation 146 0.0 90.3 mm

/gate/rsector1/geometry/setXLength 15.0 mm

/gate/rsector1/geometry/setYLength 25.8 mm

/gate/rsector1/geometry/setZLength 51.6 mm

/gate/rsector1/setMaterial Air

/gate/rsector1/vis/setColor red

/gate/rsector1/vis/setVisible 0



/gate/rsector/daughters/name module

/gate/rsector/daughters/insert box

/gate/module/placement/setTranslation 0. 0.0 0.0 cm

/gate/module/geometry/setXLength 15.0 mm

/gate/module/geometry/setYLength 25.8 mm

/gate/module/geometry/setZLength 25.8 mm

/gate/module/setMaterial Air

/gate/module/vis/setVisible 0



/gate/rsector1/daughters/name module1

/gate/rsector1/daughters/insert box

/gate/module1/placement/setTranslation 0. 0.0 0.0 cm

/gate/module1/geometry/setXLength 15.0 mm

/gate/module1/geometry/setYLength 25.8 mm

/gate/module1/geometry/setZLength 25.8 mm

/gate/module1/setMaterial Air

/gate/module1/vis/setVisible 0



/gate/module/daughters/name submodule

/gate/module/daughters/insert box

/gate/submodule/placement/setTranslation 0.0 0.0 0.0 cm

/gate/submodule/geometry/setXLength 15 mm

/gate/submodule/geometry/setYLength 25.8 mm

/gate/submodule/geometry/setZLength 25.8 mm

/gate/submodule/setMaterial Air

/gate/submodule/vis/setVisible 0



/gate/module1/daughters/name submodule1

/gate/module1/daughters/insert box

/gate/submodule1/placement/setTranslation 0.0 0.0 0.0 cm

/gate/submodule1/geometry/setXLength 15 mm

/gate/submodule1/geometry/setYLength 25.8 mm

/gate/submodule1/geometry/setZLength 25.8 mm

/gate/submodule1/setMaterial Air

/gate/submodule1/vis/setVisible 0



/gate/submodule/daughters/name crystal

/gate/submodule/daughters/insert box

/gate/crystal/placement/setTranslation 0.0 0.0 0.0 cm

/gate/crystal/geometry/setXLength 15.0 mm

/gate/crystal/geometry/setYLength 3.11 mm

/gate/crystal/geometry/setZLength 3.11 mm

/gate/crystal/setMaterial Air



/gate/submodule1/daughters/name crystal1

/gate/submodule1/daughters/insert box

/gate/crystal1/placement/setTranslation 0.0 0.0 0.0 cm

/gate/crystal1/geometry/setXLength 15.0 mm

/gate/crystal1/geometry/setYLength 3.11 mm

/gate/crystal1/geometry/setZLength 3.11 mm

/gate/crystal1/setMaterial Air



/gate/crystal/daughters/name LYSO

/gate/crystal/daughters/insert box

/gate/LYSO/placement/setTranslation 0.0 0.0 0.0 cm

/gate/LYSO/geometry/setXLength 15. mm

/gate/LYSO/geometry/setYLength 3.11 mm

/gate/LYSO/geometry/setZLength 3.11 mm

/gate/LYSO/setMaterial LYSO

/gate/LYSO/vis/setColor green



/gate/crystal1/daughters/name LYSO1

/gate/crystal1/daughters/insert box

/gate/LYSO1/placement/setTranslation 0.0 0.0 0.0 cm

/gate/LYSO1/geometry/setXLength 15. mm

/gate/LYSO1/geometry/setYLength 3.11 mm

/gate/LYSO1/geometry/setZLength 3.11 mm

/gate/LYSO1/setMaterial LYSO

/gate/LYSO1/vis/setColor green



/gate/crystal/repeaters/insert cubicArray

/gate/crystal/cubicArray/setRepeatNumberX 1

/gate/crystal/cubicArray/setRepeatNumberY 8

/gate/crystal/cubicArray/setRepeatNumberZ 8

/gate/crystal/cubicArray/setRepeatVector 0.0 3.19 3.19 mm



/gate/crystal1/repeaters/insert cubicArray

/gate/crystal1/cubicArray/setRepeatNumberX 1

/gate/crystal1/cubicArray/setRepeatNumberY 8

/gate/crystal1/cubicArray/setRepeatNumberZ 8

/gate/crystal1/cubicArray/setRepeatVector 0.0 3.19 3.19 mm



/gate/submodule/repeaters/insert cubicArray

/gate/submodule/cubicArray/setRepeatNumberX 1

/gate/submodule/cubicArray/setRepeatNumberY 1

/gate/submodule/cubicArray/setRepeatNumberZ 1

/gate/submodule/cubicArray/setRepeatVector 0.0 25.8 25.8 mm



/gate/submodule1/repeaters/insert cubicArray

/gate/submodule1/cubicArray/setRepeatNumberX 1

/gate/submodule1/cubicArray/setRepeatNumberY 1

/gate/submodule1/cubicArray/setRepeatNumberZ 1

/gate/submodule1/cubicArray/setRepeatVector 0.0 25.8 25.8 mm



/gate/module/repeaters/insert cubicArray

/gate/module/cubicArray/setRepeatNumberX 1

/gate/module/cubicArray/setRepeatNumberY 1

/gate/module/cubicArray/setRepeatNumberZ 5

/gate/module/cubicArray/setRepeatVector 0.00 25.8 25.8 mm



/gate/module1/repeaters/insert cubicArray

/gate/module1/cubicArray/setRepeatNumberX 1

/gate/module1/cubicArray/setRepeatNumberY 1

/gate/module1/cubicArray/setRepeatNumberZ 2

/gate/module1/cubicArray/setRepeatVector 0.00 25.8 25.8 mm



/gate/rsector/repeaters/insert ring

/gate/rsector/ring/setRepeatNumber 34



/gate/rsector1/repeaters/insert ring

/gate/rsector1/ring/setRepeatNumber 34



/gate/systems/cylindricalPET/rsector/attach rsector

/gate/systems/cylindricalPET/rsector/attach rsector1

/gate/systems/cylindricalPET/module/attach module

/gate/systems/cylindricalPET/module/attach module1

/gate/systems/cylindricalPET/submodule/attach submodule

/gate/systems/cylindricalPET/submodule/attach submodule1

/gate/systems/cylindricalPET/crystal/attach crystal

/gate/systems/cylindricalPET/crystal/attach crystal1

/gate/systems/cylindricalPET/layer0/attach LYSO

/gate/systems/cylindricalPET/layer1/attach LYSO1



/gate/LYSO/attachCrystalSD

/gate/LYSO1/attachCrystalSD

/gate/systems/cylindricalPET/describe



#########digitizer############



/gate/digitizer/Singles/insert adder

/gate/digitizer/Singles/insert readout

/gate/digitizer/Singles/readout/setDepth 5



/gate/digitizer/Singles/insert blurring

/gate/digitizer/Singles/blurring/setLaw linear

/gate/digitizer/Singles/blurring/linear/setResolution 0.13

/gate/digitizer/Singles/blurring/linear/setEnergyOfReference 511. keV



/gate/digitizer/Singles/insert thresholder

/gate/digitizer/Singles/thresholder/setThreshold 400. keV

/gate/digitizer/Singles/insert upholder

/gate/digitizer/Singles/upholder/setUphold 650. keV



/gate/digitizer/Singles/insert crystalblurring

/gate/digitizer/Singles/crystalblurring/setCrystalResolutionMin 0.8

/gate/digitizer/Singles/crystalblurring/setCrystalResolutionMax 0.18

/gate/digitizer/Singles/crystalblurring/setCrystalQE 0.85

/gate/digitizer/Singles/crystalblurring/setCrystalEnergyOfReference 511 keV



/gate/digitizer/Singles/insert timeResolution

/gate/digitizer/Singles/timeResolution/setTimeResolution 220. ps



/gate/digitizer/Singles/insert deadtime

/gate/digitizer/Singles/deadtime/setDeadTime 150. ns

/gate/digitizer/Singles/deadtime/setMode paralysable

/gate/digitizer/Singles/deadtime/chooseDTVolume crystal

/gate/digitizer/Coincidences/setWindow 440. ps

/gate/digitizer/Coincidences/minSectorDifference 2

/gate/digitizer/Coincidences/MultiplesPolicy takeWinnerOfGoods

/gate/digitizer/Coincidences/setOffset 0. ns





/gate/digitizer/name delay

/gate/digitizer/insert coincidenceSorter

/gate/digitizer/delay/minSectorDifference 2

/gate/digitizer/delay/setOffset 100. ns

/gate/digitizer/delay/setWindow 8. ns

/gate/digitizer/delay/MultiplesPolicy takeAllGoods



Thank you in advance for your help.
Best regards
-- 

YEONKYEONG KIM

Department of Electronic Engineering,Sogang University

Tel  : +82-2-713-2652
Mobile : +82-10-9996-3644
Email : dusrud026 at gmail.com
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