2021
First Investigation of List mode MLEM Reconstruction for Fast DC-SPECT System Design Optimization
Feng Y, Bläckberg L, Fakhri G, Worstell W, Sabet H. First Investigation of List mode MLEM Reconstruction for Fast DC-SPECT System Design Optimization. 2021, 00: 1-3. DOI: 10.1109/nss/mic44867.2021.9875864.Peer-Reviewed Original ResearchFWHM spatial resolutionCorrection of scatterAsymmetric geometryMaximum likelihood expectation maximizationLikelihood expectation maximizationSystem's imaging resolutionLM-MLEMMonte Carlo implementationMLEM reconstructionDetector headMonte-CarloSystem matrix modelSimultaneous high resolutionDesign optimizationCardiac SPECTMatrix modelSystem resolutionMC methodSpatial resolutionSystem design optimizationImage reconstructionDynamic cardiac SPECTDesign iterationsSystem sensitivityImage resolution
2020
Dynamic Cardiac SPECT for diagnostic and theranostics applications: latest results
Bläckberg L, Sajedi S, Anderson O, Feng Y, Fakhri G, Furenlid L, Sabet H. Dynamic Cardiac SPECT for diagnostic and theranostics applications: latest results. 2020, 00: 1-3. DOI: 10.1109/nss/mic42677.2020.9508002.Peer-Reviewed Original ResearchCsI:Tl crystalsMPPC arraysTl crystalsCsI:Tl scintillatorGamma-ray energiesCardiac SPECTCsI:TlLow energy resolutionCardiac SPECT imagingGamma cameraConventional gamma cameraResolution recovery techniquesSensL SiPMsEnergy resolutionStopping powerTl scintillatorDetector modulesReadout electronicsDynamic cardiac SPECTPinhole collimatorHigh power lasersPhantom studyCollimatorDetectorSiPM
2009
Quantitative simultaneous cardiac SPECT using MC‐JOSEM
Ouyang J, Zhu X, Trott C, Fakhri G. Quantitative simultaneous cardiac SPECT using MC‐JOSEM. Medical Physics 2009, 36: 602-611. PMID: 19292000, PMCID: PMC2673670, DOI: 10.1118/1.3063544.Peer-Reviewed Original ResearchConceptsMC-JOSEMEnergy windowWater-filled torso phantomScatter correctionPhotopeak energy windowStandard OSEMCardiac SPECT imagingActivity concentration ratioIterative reconstruction algorithmReconstruction algorithmMyocardium wallTorso phantomActivity estimationDetector responseEmission energyBackground compartmentPhantom dataCardiac SPECTActivity distributionRest/stress imagingScatteringCases of patientsOSEMChest painCardiac protocols
2000
Relative impact of scatter, collimator response, attenuation, and finite spatial resolution corrections in cardiac SPECT.
El Fakhri G, Buvat I, Benali H, Todd-Pokropek A, Di Paola R. Relative impact of scatter, collimator response, attenuation, and finite spatial resolution corrections in cardiac SPECT. Journal Of Nuclear Medicine 2000, 41: 1400-8. PMID: 10945534.Peer-Reviewed Original ResearchConceptsDepth-dependent collimator responseSpatial resolution correctionCollimator responseFinite spatial resolutionBull's-eye mapCardiac SPECTActivity quantitationAttenuation correctionScatter correctionResolution correctionSpatial resolutionCollimator response correctionsSignal-to-noise ratioFrequency-distance principleImpact of scatteringLeft ventricleMonte Carlo simulationsCardiac phantomScatteringCarlo simulationsLV cavityAbsolute quantitationImproved contrastLV regionsProcessing scheme