2023
Arterial spin labeled perfusion imaging with balanced steady-state free precession readout and radial sampling
Han P, Marin T, Zhuo Y, Ouyang J, El Fakhri G, Ma C. Arterial spin labeled perfusion imaging with balanced steady-state free precession readout and radial sampling. Magnetic Resonance Imaging 2023, 102: 126-132. PMID: 37187264, PMCID: PMC10524790, DOI: 10.1016/j.mri.2023.05.005.Peer-Reviewed Original ResearchMeSH KeywordsArteriesBrainImage Processing, Computer-AssistedImaging, Three-DimensionalMagnetic Resonance ImagingPerfusionPerfusion ImagingSpin LabelsConceptsOff-resonance effectsBalanced steady-state free precessionPhase-cycling techniqueTemporal SNRBalanced steady-state free precession acquisitionRadial sampling schemeSpoiled gradient-recalled acquisitionRadial samplingCartesian sampling schemeBalanced steady-state free precession readoutK-space dataSampling schemeSpin labelingSteady-state free precessionK-spaceImage readoutBanding artifactsMotion-related artifactsReadoutFree precessionArterial spin labelingImage reconstructionParallel imagingImaging timePerfusion-weighted imaging
2019
Free-Breathing Three-Dimensional T1 Mapping of the Heart Using Subspace-Based Data Acquisition and Image Reconstruction
Han P, Horng D, Marin T, Petibon Y, Ouyang J, Fakhri G, Ma C. Free-Breathing Three-Dimensional T1 Mapping of the Heart Using Subspace-Based Data Acquisition and Image Reconstruction. Annual International Conference Of The IEEE Engineering In Medicine And Biology Society (EMBC) 2019, 00: 4008-4011. PMID: 31946750, DOI: 10.1109/embc.2019.8856511.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsHeartImage EnhancementImage Processing, Computer-AssistedImaging, Three-DimensionalMagnetic Resonance ImagingMyocardiumRespirationConceptsRespiratory motionRespiratory gatingLongitudinal relaxation timeSubspace-based methodsLow-rank tensorMagnetic resonance imagingRelaxation timeT1 mappingT)-spaceSubspace-basedSparsity constraintDynamic MR imagingReconstructed mapsSpatiotemporal correlationThree-dimensionalCardiac MRHealthy subjectsIn vivo dataMagnetizationResonance imagingImage functionMR imagingData acquisitionClinical applicationTensor
2009
A quantitative evaluation study of four-dimensional gated cardiac SPECT reconstruction
Jin M, Yang Y, Niu X, Marin T, Brankov J, Feng B, Pretorius P, King M, Wernick M. A quantitative evaluation study of four-dimensional gated cardiac SPECT reconstruction. Physics In Medicine And Biology 2009, 54: 5643-5659. PMID: 19724094, PMCID: PMC3690946, DOI: 10.1088/0031-9155/54/18/019.Peer-Reviewed Original ResearchConceptsGated cardiac SPECT imagesNURBS-based cardiac-torso (NCATMotion-compensated temporal regularizationCardiac SPECT imagingBias-variance analysisDistance-dependent blurringGated cardiac SPECTMotion compensation approachReconstructed myocardiumSPECT imagesDetection of perfusion defectsSPECT reconstructionCardiac SPECTIntensity uniformityTemporal smoothnessPatient dataLeft ventricular myocardiumReconstructed imagesReconstruction processSpatial smoothingPerfusion defectsScatteringDegradation factorsTemporal regularityVentricular myocardiumMotion-compensated temporal summation of cardiac gated SPECT images using a deformable mesh model
Marin T, Wernick M, Yang Y, Brankov J. Motion-compensated temporal summation of cardiac gated SPECT images using a deformable mesh model. Annual International Conference Of The IEEE Engineering In Medicine And Biology Society (EMBC) 2009, 2009: 3657-3660. PMID: 19964313, PMCID: PMC2810283, DOI: 10.1109/iembs.2009.5333693.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsCardiac-Gated Imaging TechniquesCardiac-Gated Single-Photon Emission Computer-Assisted TomographyComputer SimulationHeartHumansImage Processing, Computer-AssistedImaging, Three-DimensionalModels, StatisticalMotionPhantoms, ImagingRadiographic Image Interpretation, Computer-AssistedTomography, Emission-Computed, Single-PhotonConceptsDeformable mesh modelMotion blurring artifactsMesh modelCardiac gated SPECT imagingCardiac gated SPECTEstimating heart motionHeart motionNoisy imagesMotion estimationNoise reduction performanceTime dimensionEstimated motionBlurring artifactsIndividual framesPartial volume effectsNoise reductionQuantitative evaluationReduction performanceImagesNoiseSPECT imagesStatic SPECT imagesArtifactsFrameGate sequences