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
2022
Joint 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
2021
Free‐breathing 3D cardiac T1 mapping with transmit B1 correction at 3T
Han P, Marin T, Djebra Y, Landes V, Zhuo Y, Fakhri G, Ma C. Free‐breathing 3D cardiac T1 mapping with transmit B1 correction at 3T. Magnetic Resonance In Medicine 2021, 87: 1832-1845. PMID: 34812547, PMCID: PMC8810588, DOI: 10.1002/mrm.29097.Peer-Reviewed Original ResearchMeSH KeywordsHeartHumansImage Interpretation, Computer-AssistedMagnetic Resonance ImagingPhantoms, ImagingReproducibility of ResultsConceptsFlip-angle estimationCardiac T<sub>1</sub> mappingGradient echo readoutThrough-plane spatial resolutionImaging timePractical imaging timesFree breathingPhantom studyB1 correctionAccelerated imagingIn-planeT)-spaceMyocardial T<sub>1</sub> valuesSubspace-based methodsSpatial resolutionImaging experimentsAcquisition schemeT)-space dataSubject-specific timeCorrectionModified Look-Locker inversion recoveryLook-Locker inversion recoveryTime of data acquisitionAverage imaging timeInversion-recovery sequence
2009
Iterative Image Reconstruction Model Including Susceptibility Gradients Combined with Z-shimming Gradients in fMRI
Zhuo Y, Sutton B. Iterative Image Reconstruction Model Including Susceptibility Gradients Combined with Z-shimming Gradients in fMRI. Annual International Conference Of The IEEE Engineering In Medicine And Biology Society (EMBC) 2009, 2009: 5721-5724. PMID: 19963915, DOI: 10.1109/iembs.2009.5332669.Peer-Reviewed Original ResearchConceptsSusceptibility-induced magnetic field gradientsMagnetic field gradientField gradientEffects of magnetic field gradientNear air/tissue interfacesField inhomogeneity effectsIterative reconstruction algorithmSignal lossSpiral-inIncreasing acquisition timeZ-shimMagnetic fieldAir/tissue interfacesMR signal modelMagnetic field distortionFunctional magnetic resonance imagingMagnetic susceptibility artifactsBlood oxygen levelAcquisition timeSusceptibility artifactsReconstruction algorithmField distortionImage distortionData acquisition techniquesSignal distortionEffect on BOLD Sensitivity Due to Susceptibility-induced Echo Time Shift in Spiral-in Based Functional MRI
Zhuo Y, Sutton B. Effect on BOLD Sensitivity Due to Susceptibility-induced Echo Time Shift in Spiral-in Based Functional MRI. Annual International Conference Of The IEEE Engineering In Medicine And Biology Society (EMBC) 2009, 2009: 4449-4452. PMID: 19964630, DOI: 10.1109/iembs.2009.5333815.Peer-Reviewed Original ResearchMeSH KeywordsArtifactsBrainHumansMagnetic Resonance ImagingModels, TheoreticalOxygenSignal Processing, Computer-AssistedConceptsEffective echo timeBOLD sensitivityEcho time shiftsSusceptibility gradientsSpiral-in trajectoryMagnetic field inhomogeneityBOLD functional magnetic resonance imagingEcho timeSusceptibility artifactsSpiral-inAir/tissue interfacesField inhomogeneityFunctional magnetic resonance imagingIn-planeBlood oxygen levelReconstructed imagesGeometric distortionSignal lossTime shiftsVentral brainBOLDInhomogeneityShiftOrbitofrontal cortex