Transcription of QC Protocols Gamma Camera & SPECT Systems
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QC Protocols Gamma Camera & SPECT Systems
QC ProtocolsQC ProtocolsGamma Camera & Gamma Camera & SPECT SystemsSPECT SystemsJames R Halama, PhDJames R Halama, PhDLoyola University Medical CenterLoyola University Medical CenterMaywood, ILMaywood, Camera ImagingGamma Camera overview of Gamma Camera OperationBrief overview of Gamma Camera overview of Camera CalibrationsBrief overview of Camera PhantomImagingSPECT &ReconstructionAcquisition & &ICANL Accreditation RequirementsACR &ICANL Accreditation RecommendationsFinal RecommendationsGamma Camera Imaging ofRadioactive Sources in PatientsThree major channels the -rays and localizes thesource in the (Tl) Crystal(single ormulti-crystal) over width ofpatient stops the ofPMT s localizes -ray interaction in crystalCollimatorPMTPMTNaICrystalLocaliz e -ray Hit in Crystal byPosition Weighed Sumof PMTP ulsesFigure 4 Figure 4--22P2P1P3P4P5P6P7P8p1p2p3p4p5p6p7p8r1r 2r3r4r5r6r7r8Xp1r1+ p2r2+.. +p7r7+p8r8p1+p2+.. +p7+p8X =X+ SummingAmplifierpi-PMTipulseri-positiona l weightNaI crystalComponents of Gamma CameraSpatial ResolutionnnIntrinsicIntrinsicResolution resolution Ability ofAbility ofthetheNaI(NaI(TlTl) crystal and PMT) crystal and PMTcombination to localizecombination to localize --rayrayinteractions in the in the Ability ofAbility ofthe collimator to localize thethe collimator to localize the --ray source in the source in the OverallOverallresolution combining collimatorresolutio
Spatial Resolution n Intrinsic Resolution–Ability of the NaI(Tl) crystal and PMT combination to localize ðg-ray ... Low Energy High Resolution 1.11 23.6 4.2 7.5 12.3 230 (99mTc) Low Energy Ultra-High Resolution 1.08 35.6 4.2 5.9 8.6 100 (99mTc) …
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