2023
Simulation results for limited-angle ultra-high time-of-flight resolution PET system
Marin T, Zhuo Y, Orehar M, Razdevšekc G, Dolenec R, Mounime I, Alamo J, Benlloch J, Chemli Y, Fernández-Tenllado J, Gascon D, Gola A, Gomez S, Grogg K, Guberman D, Korpar S, Krizan P, Majewski S, Manera R, Mariscal-Castilla A, Mauricio J, Merzi S, Morera C, Normandin M, Pavon G, Penna M, Seljak A, Studen A, Pestotnik R, Fakhri G. Simulation results for limited-angle ultra-high time-of-flight resolution PET system. 2023, 00: 1-1. DOI: 10.1109/nssmicrtsd49126.2023.10337821.Peer-Reviewed Original ResearchResolution PET systemsPET systemAxial fieldPositron emission tomography systemPositron emission tomography scannerTotal-body PET systemsLong axial fieldTOF resolutionNovel detectorNumerical phantomHigh-sensitivity systemMonte-Carlo simulationsSpatial resolutionPositron emission tomographyMonte-CarloSystem sensitivityImage resolutionImage qualityScintillationReconstruction engineFWHMResolutionTOFPhantomScanner
2022
Simulation study of a 50 ps panel TOF PET imager
Pestotnik R, Razdevšek G, Dolenec R, Fakhri G, Križan P, Majewski S, Studen A, Korpar S. Simulation study of a 50 ps panel TOF PET imager. Journal Of Instrumentation 2022, 17: c12010. DOI: 10.1088/1748-0221/17/12/c12010.Peer-Reviewed Original ResearchPET scannerGamma detectorGamma raysTime-of-flight positron emission tomographyState-of-the-art clinical PET scannersGamma detection efficiencyClinical PET scannerImaging large objectsImproved time resolutionArtifact-free imagesDifferent phantomsDetector arrangementTime-of-flightBiograph VisionImage quality parametersDetection efficiencyTiming accuracyTime resolutionDetectorFWHMPositron emission tomographyReconstructed imagesRaysPositron emission tomography imagingMultichannel system
2021
Multipanel Limited Angle PET System With 50 ps FWHM Coincidence Time Resolution: A Simulation Study
Razdevšek G, Dolenec R, Križan P, Majewski S, Studen A, Korpar S, Fakhri G, Pestotnik R. Multipanel Limited Angle PET System With 50 ps FWHM Coincidence Time Resolution: A Simulation Study. IEEE Transactions On Radiation And Plasma Medical Sciences 2021, 6: 721-730. DOI: 10.1109/trpms.2021.3115704.Peer-Reviewed Original ResearchPET systemFWHM coincidence timing resolutionCoincidence time resolutionLutetium oxyorthosilicate crystalsExtended cardiac-torsoFlat-panel detectorClinical PET/CT scannerSpatial resolutionDerenzo phantomPlanar detectorsCount rateScanner geometryCardiac-torsoHot-rodDetection efficiencyParallax errorLow detection efficiencyIncreasing crystal lengthPET/CT scannerTime resolutionImage qualityScanner designAngular coverageFWHMCrystal length
2017
GATE simulation of a new design of pinhole SPECT system for small animal brain imaging
Ozsahin D, Bläckberg L, Fakhri G, Sabet H. GATE simulation of a new design of pinhole SPECT system for small animal brain imaging. Journal Of Instrumentation 2017, 12: c01085-c01085. DOI: 10.1088/1748-0221/12/01/c01085.Peer-Reviewed Original ResearchFWHM spatial resolutionDetector modulesSPECT systemNEMA NU-4 protocolImage quality simulationsIntrinsic detector resolutionSpatial resolutionPinhole SPECT systemSmall-animal SPECT imagingAnimal SPECT imagingStationary SPECT systemAnimal brain imagingSmall animal brain imagingSmall animal imagingDetector resolutionSPECT detectorGATE simulationsDetector sizeSystem sensitivityPhantom evaluationResolution recoveryFOV sizeDetectorAnimal imagingFWHM
2016
GATE Simulation of a High-Performance Stationary SPECT System for Cardiac Imaging
Uzun-Özşahin D, Bläckberg L, Moghadam N, Fakhri G, Sabet H. GATE Simulation of a High-Performance Stationary SPECT System for Cardiac Imaging. 2016, 1-3. DOI: 10.1109/nssmic.2016.8069814.Peer-Reviewed Original ResearchPoint spread functionDerenzo-like phantomGATE simulated resultsGATE simulation studiesSystem spatial resolutionStationary SPECT systemGATE simulationsSPECT systemMultiple simultaneous viewsCardiac imaging applicationsActive rodsSpread functionSpatial resolutionImaging applicationsImage reconstructionGateCorrection techniqueFWHMContouring systemPhantomResolutionLaserCardiac imaging
2005
Collimator Optimization for Detection and Quantitation Tasks: Application to Gallium-67 Imaging
Moore S, Kijewski M, Fakhri G. Collimator Optimization for Detection and Quantitation Tasks: Application to Gallium-67 Imaging. IEEE Transactions On Medical Imaging 2005, 24: 1347-1356. PMID: 16229420, DOI: 10.1109/tmi.2005.857211.Peer-Reviewed Original ResearchMeSH KeywordsCitratesComputer SimulationComputer-Aided DesignEquipment DesignEquipment Failure AnalysisGalliumHumansImage EnhancementImage Interpretation, Computer-AssistedModels, BiologicalNeoplasmsPhantoms, ImagingPositron-Emission TomographyRadiopharmaceuticalsReproducibility of ResultsSensitivity and SpecificityConceptsMedium-energy low-penetration collimatorCollimator optimizationGeometric spatial resolutionPhotopeak energy windowSimulation of photon transportLead X-raysClinical imaging tasksActivity estimation taskSignal-to-noise ratioGallium-67 imagingContaminating photonsEnergy windowGeometric efficiencyCollimator designFixed energyPhoton transportOptimal collimatorCollimatorHotelling observerFWHMSpatial resolutionNuclear medicineDetectorResolution valuesImaging tasks