2022
Manifold Learning via Linear Tangent Space Alignment (LTSA) for Accelerated Dynamic MRI With Sparse Sampling
Djebra Y, Marin T, Han P, Bloch I, Fakhri G, Ma C. Manifold Learning via Linear Tangent Space Alignment (LTSA) for Accelerated Dynamic MRI With Sparse Sampling. IEEE Transactions On Medical Imaging 2022, 42: 158-169. PMID: 36121938, PMCID: PMC10024645, DOI: 10.1109/tmi.2022.3207774.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsComputer SimulationImage Processing, Computer-AssistedMagnetic Resonance ImagingModels, TheoreticalConceptsSpace alignmentSampled k-space dataState-of-the-art methodsIntrinsic low-dimensional manifold structureNumerical simulation studyLow-dimensional manifold structureState-of-the-artLinear subspace modelSparsity modelModel-based frameworkSubspace modelManifold structureMathematical modelManifold modelSparse samplingImage reconstructionMRI applicationsDynamic magnetic resonance imagingSpatiotemporal signalsSpatial resolutionPerformanceSimulation studyImagesMethodSparsityJoint spectral quantification of MR spectroscopic imaging using linear tangent space alignment‐based manifold learning
Ma C, Han P, Zhuo Y, Djebra Y, Marin T, Fakhri G. Joint spectral quantification of MR spectroscopic imaging using linear tangent space alignment‐based manifold learning. Magnetic Resonance In Medicine 2022, 89: 1297-1313. PMID: 36404676, PMCID: PMC9892363, DOI: 10.1002/mrm.29526.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsBrainComputer SimulationHumansMagnetic Resonance ImagingMagnetic Resonance SpectroscopyProton Magnetic Resonance SpectroscopyConceptsSubspace-based methodsManifold learningIntrinsic low-dimensional structureGlobal coordinationLearning-based methodsNumerical simulation dataSpatial smoothness constraintSparsity constraintSpace alignmentSubspace modelSmoothness constraintSuperior performanceRoot mean square errorLinear transformationMechanical simulationsLow-dimensionalSquare errorSubspaceExperimental dataSpectroscopic imagingQuantum mechanical simulationsCoordinate alignmentMR spectroscopic imagingSpectral quantificationSimulated data
2016
Investigation of control scans in pseudo‐continuous arterial spin labeling (pCASL): Strategies for improving sensitivity and reliability of pCASL
Han P, Choi S, Park S. Investigation of control scans in pseudo‐continuous arterial spin labeling (pCASL): Strategies for improving sensitivity and reliability of pCASL. Magnetic Resonance In Medicine 2016, 78: 917-929. PMID: 27690322, DOI: 10.1002/mrm.26474.Peer-Reviewed Original Research
2015
Inter-Slice Blood Flow and Magnetization Transfer Effects as A New Simultaneous Imaging Strategy
Han P, Barker J, Kim K, Choi S, Bae K, Park S. Inter-Slice Blood Flow and Magnetization Transfer Effects as A New Simultaneous Imaging Strategy. PLOS ONE 2015, 10: e0140560. PMID: 26466316, PMCID: PMC4605487, DOI: 10.1371/journal.pone.0140560.Peer-Reviewed Original ResearchConceptsAlternate ascending/descending directional navigationPseudo-continuous ASLBlood flowPulsed ASL methodClinically reasonable timeMT asymmetryBlood flow signalsMaps of blood flowSimultaneous blood flowCerebral blood flow signalsPreparation RF pulseFlip anglePerfusion signalBSSFP readoutMT ratioFlow signalsImaging strategiesMagnetization transferASL methodLabeling planeRF pulsesMagnetization transfer effectsSuperposition of signals