<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body style='font-size: 10pt'> Hello, I am running Gate version 7.2 and I am trying to extract the dose from a moving phantom in order to simulate a CT scan. From the code below I can visualize the rotation of the xcat phantom but I take zero counts as output. /control/execute mac/verbose.mac #/control/execute mac/visu.mac /gate/geometry/setMaterialDatabase data/GateMaterials.db /gate/world/setMaterial Vacuum /gate/world/geometry/setXLength 1000. cm /gate/world/geometry/setYLength 1000. cm /gate/world/geometry/setZLength 1000. cm # Container to rotate the phantom /gate/world/daughters/name CT /gate/world/daughters/insert box /gate/CT/setMaterial Vacuum /gate/CT/geometry/setXLength 640. mm /gate/CT/geometry/setYLength 640. mm /gate/CT/geometry/setZLength 1825. mm /gate/CT/vis/forceWireframe /gate/CT/moves/insert rotation /gate/CT/rotation/setSpeed 45 deg/s /gate/CT/rotation/setAxis 0 0 1 # Patient phantom (128x128x128 voxels, 5 mm voxelize) /gate/CT/daughters/name xcat /gate/CT/daughters/insert ImageRegularParametrisedVolume /gate/xcat/geometry/setImage data/xcat.h33 /gate/xcat/geometry/setRangeToMaterialFile data/Range.dat /gate/xcat/geometry/TranslateTheImageAtThisIsoCenter 0 0 0 mm /gate/xcat/placement/setTranslation -320 -320 -912.5 mm #/gate/xcat/placement/setRotationAxis 1 0 0 #/gate/xcat/placement/setRotationAngle 0 deg /gate/xcat/vis/forceWireframe #/gate/xcat/setSkipEqualMaterials 0 /gate/CT/attachPhantomSD /gate/xcat/attachPhantomSD /gate/physics/addProcess PhotoElectric /gate/physics/processes/PhotoElectric/setModel StandardModel /gate/physics/addProcess Compton /gate/physics/processes/Compton/setModel StandardModel /gate/physics/addProcess RayleighScattering /gate/physics/processes/RayleighScattering/setModel PenelopeModel /gate/physics/addProcess ElectronIonisation /gate/physics/processes/ElectronIonisation/setModel StandardModel e- /gate/physics/addProcess Bremsstrahlung /gate/physics/processes/Bremsstrahlung/setModel StandardModel e- /gate/physics/addProcess MultipleScattering e- /gate/physics/processList Enabled /gate/physics/processList Initialized /gate/actor/addActor DoseActor doseDistribution /gate/actor/doseDistribution/save output/myactor.mhd /gate/actor/doseDistribution/attachTo xcat /gate/actor/doseDistribution/stepHitType random /gate/actor/doseDistribution/setPosition 0 0 0 mm /gate/actor/doseDistribution/setVoxelSize 5 5 5 mm /gate/actor/doseDistribution/enableEdep true /gate/actor/doseDistribution/enableUncertaintyEdep true /gate/actor/doseDistribution/enableDose true /gate/actor/doseDistribution/enableSquaredEdep false /gate/actor/doseDistribution/enableNumberOfHits false /gate/actor/doseDistribution/saveEveryNSeconds 10 /gate/source/addSource xraygun gps /gate/source/xraygun/gps/verbose 1 /gate/source/xraygun/gps/particle gamma /gate/source/xraygun/gps/energytype Arb /gate/source/xraygun/gps/histname arb /gate/source/xraygun/gps/emin 12.00 keV /gate/source/xraygun/gps/emax 120.00 keV /control/execute mac/histogram.mac /gate/source/xraygun/gps/arbint Lin /gate/source/xraygun/gps/type Plane /gate/source/xraygun/gps/shape Rectangle /gate/source/xraygun/gps/halfx 0.9 mm /gate/source/xraygun/gps/halfy 0.8 mm /gate/source/xraygun/gps/centre -60. 0. 0. cm /gate/source/xraygun/gps/angtype iso /gate/source/xraygun/gps/pos/rot1 1 0 0 /gate/source/xraygun/gps/pos/rot2 0 1 0 #cone angle /gate/source/xraygun/gps/mintheta 88.1 deg /gate/source/xraygun/gps/maxtheta 91.9 deg #fan angle /gate/source/xraygun/gps/minphi 155. deg /gate/source/xraygun/gps/maxphi 205.0 deg /gate/source/list /gate/run/initialize /gate/random/setEngineName MersenneTwister /gate/random/setEngineSeed auto /gate/application/setTimeStart 0 s /gate/application/setTimeStop 10. s /gate/application/setTimeSlice 1. s /gate/application/setTotalNumberOfPrimaries 10 /gate/application/startDAQ Is something wrong or missing in the code? I would appreciate any kind of advice. Thank you Theodora <div> <div class="pre" style="margin: 0; padding: 0; font-family: monospace"> </div> </div> </body></html>