<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false"><div><div><br></div><div>Dear Gate users</div><div>I'm defining a PET system using Gate simulation.</div><div>When I'm calculating PET sensitivity, It's about 1.5 times bigger than the experimental setup. I'm not sure If I'm doing some parts wrong in my program or if I'm defining the NA22 source in the wrong method. Any Idea can help me.</div><div>Sensitivity calculating method: N.Coincinedine/6s*100000*0.89955</div><div>Best regards</div><div>Zahra</div><div><br></div><div><br></div><div>/gate/physics/addProcess PhotoElectric</div><div>/gate/physics/processes/PhotoElectric/setModel StandardModel</div><div><br></div><div>/gate/physics/addProcess Compton</div><div>/gate/physics/processes/Compton/setModel StandardModel</div><div><br></div><div>/gate/physics/addProcess RayleighScattering</div><div>/gate/physics/processes/RayleighScattering/setModel PenelopeModel</div><div><br></div><div>/gate/physics/addProcess ElectronIonisation</div><div>/gate/physics/processes/ElectronIonisation/setModel StandardModel e-</div><div>/gate/physics/processes/ElectronIonisation/setModel StandardModel e+</div><div><br></div><div>/gate/physics/addProcess Bremsstrahlung</div><div>/gate/physics/processes/Bremsstrahlung/setModel StandardModel e-</div><div>/gate/physics/processes/Bremsstrahlung/setModel StandardModel e+</div><div><br></div><div>/gate/physics/addProcess PositronAnnihilation</div><div><br></div><div>/gate/physics/addProcess MultipleScattering e+</div><div>/gate/physics/addProcess MultipleScattering e-</div><div><br></div><div>/gate/physics/processList Enabled</div><div>/gate/physics/processList Initialized</div><div><br></div><div>/gate/physics/addProcess Decay</div><div>/gate/physics/addProcess RadioactiveDecay GenericIon</div><div><br></div><div><br></div><div>#=====================================================</div><div># INITIALISATION</div><div>#=====================================================</div><div><br></div><div>/gate/run/initialize</div><div><br></div><div><br></div><div><br></div><div>#=====================================================</div><div># D I G I T I Z E R: DETECTOR ELECTRONIC RESPONSE</div><div>#===================================================== </div><div><br></div><div>/gate/digitizer/Singles/insert adder</div><div>/gate/digitizer/Singles/insert readout</div><div>/gate/digitizer/Singles/readout/setDepth 3</div><div><br></div><div>/gate/digitizer/Singles/insert blurring</div><div>/gate/digitizer/Singles/blurring/setResolution 0.12</div><div>/gate/digitizer/Singles/blurring/setEnergyOfReference 511. keV</div><div><br></div><div>/gate/digitizer/Singles/insert thresholder</div><div>/gate/digitizer/Singles/thresholder/setThreshold 435. keV</div><div>/gate/digitizer/Singles/insert upholder</div><div>/gate/digitizer/Singles/upholder/setUphold 650. keV</div><div><br></div><div><br></div><div>#=====================================================</div><div>#<span style="white-space: pre-wrap;"> </span>C O I N C I D E N C E S O R T E R</div><div>#===================================================== </div><div><br></div><div>/gate/digitizer/Coincidences/setWindow 4.11 ns</div><div><br></div><div>/gate/digitizer/Coincidences/minSectorDifference 1</div><div>/gate/digitizer/name delay</div><div>/gate/digitizer/insert coincidenceSorter</div><div>/gate/digitizer/delay/setWindow 4.11 ns</div><div>/gate/digitizer/delay/setOffset 500. ns</div><div><br></div><div>#=====================================================</div><div># P A R T I C L E S O U R C E</div><div>#=====================================================</div><div><br></div><div><br></div><div>/gate/source/addSource na22</div><div>/gate/source/na22/setActivity 100000 Bq</div><div>/gate/source/na22/gps/particle ion</div><div>/gate/source/na22/gps/ion 11 22 0 0</div><div>/gate/source/na22/gps/monoenergy 0. keV</div><div>/gate/source/na22/gps/angtype iso</div><div>/gate/source/na22/gps/type Volume</div><div>/gate/source/na22/gps/shape Sphere</div><div>/gate/source/na22/gps/radius 0.5 mm</div><div>/gate/source/na22/gps/centre 0. 0. 0. mm</div><div>/gate/source/list</div><div><br></div><div><br></div><div><br></div><div><br></div><div>#=====================================================</div><div># D A T A O U T P U T </div><div>#=====================================================</div><div><br></div><div>/gate/output/root/enable</div><div>/gate/output/root/setFileName YourFile</div><div>/gate/output/root/setRootHitFlag 1</div><div>/gate/output/root/setRootSinglesFlag 1</div><div>/gate/output/root/setRootCoincidencesFlag 1</div><div>/gate/output/root/setRootdelayFlag 1</div><div><br></div><div><br></div><div>#====================================================</div><div># R A N D O M E N G I N E A N D S E E D</div><div>#====================================================</div><div># JamesRandom Ranlux64 MersenneTwister</div><div>/gate/random/setEngineName JamesRandom</div><div>#/gate/random/setEngineSeed default</div><div>#/gate/random/setEngineSeed auto</div><div>#/gate/random/setEngineSeed 123456789</div><div>/gate/random/setEngineSeed default</div><div>#/gate/random/resetEngineFrom fileName</div><div>/gate/random/verbose 1</div><div><br></div><div>#=====================================================</div><div># M E A S U R E M E N T S E T T I N G S </div><div>#=====================================================</div><div><br></div><div>/gate/application/setTimeSlice 6 s</div><div>/gate/application/setTimeStart 0 s</div><div>/gate/application/setTimeStop 6 s</div><div><br></div><div>/gate/application/startDAQ</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div></div><br></div></div></body></html>