2021
Investigation of a Model-Based Time-Over-Threshold Technique for Phoswich Crystal Discrimination
Bouziri H, Pepin C, Koua K, Benhouria M, Paulin C, Ouyang J, Normandin M, Pratte J, Fakhri G, Lecomte R, Fontaine R. Investigation of a Model-Based Time-Over-Threshold Technique for Phoswich Crystal Discrimination. IEEE Transactions On Radiation And Plasma Medical Sciences 2021, 6: 393-403. PMID: 35372739, PMCID: PMC8974315, DOI: 10.1109/trpms.2021.3077412.Peer-Reviewed Original ResearchPulse shape discriminationCrystal identificationPhoswich detectorEnergy windowTime-over-threshold techniqueBroad energy windowCR-RC shaperCharge sensitive preamplifierFree running analogPhoswich assembliesLYSO scintillatorSensitive preamplifierCrystal discriminationAPD arraysShape discriminationEvent energyElectronic readoutTime of occurenceDecay timeLGSODetectorIncreasing pixelizationLYSODetection front endCrystal
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
2007
Fast Monte Carlo based joint iterative reconstruction for simultaneous SPECT imaging
Ouyang J, Fakhri G, Moore S. Fast Monte Carlo based joint iterative reconstruction for simultaneous SPECT imaging. Medical Physics 2007, 34: 3263-3272. PMID: 17879789, DOI: 10.1118/1.2756601.Peer-Reviewed Original ResearchConceptsMC-JOSEMEnergy windowFast Monte CarloSignal-to-noise ratioScatter correction methodOrdered-subsets expectation-maximizationMonte CarloOrdered-subsets expectation-maximization algorithmIterative reconstruction algorithmPrimary photonsReconstruction algorithmPhoton transportSeptal penetrationDetector responseMC simulationsIterative reconstructionAttenuation distributionStandard OSEMPhotonsProjection dataPatient-specific activityDetectorReconstructed imagesScatteringEstimation of scattering
2005
Fast Monte Carlo Estimation of Patient and Detector Scatter and Crosstalk Contamination in SPECT Imaging
Ouyang J, Moore S, Park M, Fakhri G. Fast Monte Carlo Estimation of Patient and Detector Scatter and Crosstalk Contamination in SPECT Imaging. 2005, 3: 1560-1562. DOI: 10.1109/nssmic.2005.1596616.Peer-Reviewed Original ResearchDetector effectsEnergy windowTriple-energy window methodConvolution-based forced detectionPhoton interaction pointSimulate photon interactionsLower energy windowScattering mapCompton scatteringPhoton contributionEnergy binsPhoton interactionsMultiple photonsDetector scatterImaging isotopesCoherent scatteringAttenuation phantomMonte Carlo methodPhotoelectric effectInteraction pointPhantom experimentsDetectorCrosstalk contaminationScatteringCarlo method