2020
Motion correction for PET data using subspace-based real-time MR imaging in simultaneous PET/MR
Marin T, Djebra Y, Han P, Chemli Y, Bloch I, Fakhri G, Ouyang J, Petibon Y, Ma C. Motion correction for PET data using subspace-based real-time MR imaging in simultaneous PET/MR. Physics In Medicine And Biology 2020, 65: 235022. PMID: 33263317, PMCID: PMC7985095, DOI: 10.1088/1361-6560/abb31d.Peer-Reviewed Original ResearchConceptsPositron emission tomography reconstructionMotion-corrected PET reconstructionsPET reconstructionMotion-corrected PET imagesIrregular respiratory motionMotion fieldMotion correction methodMotion correction approachIrregular motion patternsUndersampled k-space dataImage quality of positron emission tomographyQuality of positron emission tomographyMotion patternsLow-rank characteristicsRespiratory motionContrast-to-noise ratioEstimated motion fieldSurrogate signalsMotion correctionK-space dataImage qualityReal-time MR imagingSimultaneous PET/MRMotion artifact reductionPET/MR scanners
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 ResearchConceptsRespiratory 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
2018
MR-based motion correction for cardiac PET parametric imaging: a simulation study
Guo R, Petibon Y, Ma Y, El Fakhri G, Ying K, Ouyang J. MR-based motion correction for cardiac PET parametric imaging: a simulation study. EJNMMI Physics 2018, 5: 3. PMID: 29388075, PMCID: PMC5792384, DOI: 10.1186/s40658-017-0200-9.Peer-Reviewed Original ResearchNon-motion-correctedPositron emission tomography-magnetic resonanceMR-based motion correctionRespiratory motionMotion correctionActivity distributionMotion correction methodRespiratory gatingPET sinogramsNoise levelCardiac gatingMRI simulationOne-tissue compartment modelNoise realizationsMC methodPET dataCardiac motionReduce motion blurParametric imagesIncreased noise levelConclusionsThis simulation studyArterial input functionPET imagingGateMyocardial regions
2015
Accelerated acquisition of tagged MRI for cardiac motion correction in simultaneous PET‐MR: Phantom and patient studies
Huang C, Petibon Y, Ouyang J, Reese T, Ahlman M, Bluemke D, El Fakhri G. Accelerated acquisition of tagged MRI for cardiac motion correction in simultaneous PET‐MR: Phantom and patient studies. Medical Physics 2015, 42: 1087-1097. PMID: 25652521, PMCID: PMC4312342, DOI: 10.1118/1.4906247.Peer-Reviewed Original ResearchConceptsPET motion correctionMotion correctionSimultaneous PET-MRTMR dataPET list-mode dataPET-MRList-mode dataCardiac motion correctionPET-MR scannersImage qualityParallel imagingAcquisition timePET imagingRespiratory motionCompressive sensingMotion fieldAttenuation correctionDefect contrastModerate acceleration factorsDegradation of image qualityTagged MRCardiac phantomLong acquisition timesPhantomAccurate motion field
2014
Relative role of motion and PSF compensation in whole‐body oncologic PET‐MR imaging
Petibon Y, Huang C, Ouyang J, Reese T, Li Q, Syrkina A, Chen Y, Fakhri G. Relative role of motion and PSF compensation in whole‐body oncologic PET‐MR imaging. Medical Physics 2014, 41: 042503. PMID: 24694156, PMCID: PMC3971824, DOI: 10.1118/1.4868458.Peer-Reviewed Original ResearchConceptsPoint spread function modelRespiratory motionPoint spread functionPET-MR scannersPencil-beam navigator echoesPET-MRMeasurement of respiratory motionPSF modelRespiratory motion correctionDetector blur effectsModel respiratory motionLung-liver interfacePatient studiesLesion contrastSimultaneous PET-MRSource of image degradationWhole-body PET imagingPET reconstruction algorithmMoving lesionsPhantom experiment resultsPET eventsContrast recoveryNavigator echoesIterative reconstruction processMotion correctionTowards coronary plaque imaging using simultaneous PET-MR: a simulation study
Petibon Y, Fakhri G, Nezafat R, Johnson N, Brady T, Ouyang J. Towards coronary plaque imaging using simultaneous PET-MR: a simulation study. Physics In Medicine And Biology 2014, 59: 1203-1222. PMID: 24556608, PMCID: PMC4061607, DOI: 10.1088/0031-9155/59/5/1203.Peer-Reviewed Original ResearchMeSH KeywordsComputer SimulationCoronary AngiographyCoronary StenosisHumansImage Interpretation, Computer-AssistedImaging, Three-DimensionalMagnetic Resonance AngiographyModels, CardiovascularMultimodal ImagingPhantoms, ImagingPositron-Emission TomographyReproducibility of ResultsSensitivity and SpecificityConceptsSimultaneous PET-MRChannelized Hotelling observerAttenuation mapMotion correctionPET-MRFluorodeoxyglucose-positron emission tomography imagingRespiratory motion fieldsMotion correction methodCho SNRMotion correction techniqueAnthropomorphic phantomUncorrected reconstructionsRespiratory motionXCAT phantomCoronary plaque imagingMonte Carlo simulationsPET reconstructionXCATActivity distributionCardiac gatingNon-rigid registrationHotelling observerCarlo simulationsPlaque imagingPhantom
2013
Magnetic Resonance-Based Motion Correction for Positron Emission Tomography Imaging
Ouyang J, Li Q, Fakhri G. Magnetic Resonance-Based Motion Correction for Positron Emission Tomography Imaging. Seminars In Nuclear Medicine 2013, 43: 60-67. PMID: 23178089, PMCID: PMC3508789, DOI: 10.1053/j.semnuclmed.2012.08.007.Peer-Reviewed Original ResearchConceptsMotion correctionClinical whole-body PET scannersMotion-corrected PET imagesWhole-body PET scannerPET motion correctionNonrigid image registration algorithmAcquired MR imagesRespiratory motionImage registration algorithmPET scannerSimultaneous PET/magnetic resonancePET reconstructionSimultaneous PET/MRPatient motionImage qualityIterative PET reconstructionPET/MR studiesPET/magnetic resonanceAttenuating mediaImage artifactsRegistration algorithmSpatial resolutionReconstruction algorithmPositron emission tomographyMR imaging techniques