2024
Constrained alternating minimization for parameter mapping (CAMP)
Elsaid N, Dispenza N, Hu C, Peters D, Constable R, Tagare H, Galiana G. Constrained alternating minimization for parameter mapping (CAMP). Magnetic Resonance Imaging 2024, 110: 176-183. PMID: 38657714, PMCID: PMC11193090, DOI: 10.1016/j.mri.2024.04.029.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsArtifactsBrainHumansImage EnhancementImage Processing, Computer-AssistedMagnetic Resonance ImagingPhantoms, ImagingReproducibility of ResultsConceptsAlternating minimizationAccelerated parameter mappingImage qualityReconstructed image qualityEfficient reconstruction algorithmSacrificing model accuracyParameter mapsPhantom studyK-space samplingAcceleration datasetsK-spaceUndersampling artifactsCartesian acquisitionConsecutive imagesReconstruction algorithmIndividual imagesModel cost functionExponential decayEcho timeReconstruction methodCost functionReduce artifactsPhantomScan timeObjective functionEncoding scheme design for gradient-free, nonlinear projection imaging using Bloch-Siegert RF spatial encoding in a low-field, open MRI system
Selvaganesan K, Ha Y, Sun H, Zhang Z, Sun C, Samardzija A, Galiana G, Constable R. Encoding scheme design for gradient-free, nonlinear projection imaging using Bloch-Siegert RF spatial encoding in a low-field, open MRI system. Scientific Reports 2024, 14: 3307. PMID: 38332252, PMCID: PMC10853509, DOI: 10.1038/s41598-024-53703-y.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsArtifactsImage Processing, Computer-AssistedMagnetic Resonance ImagingPhantoms, ImagingConceptsBloch-SiegertSpatial encodingBloch-Siegert shiftGradient-freeLow-field imagesLow fieldsProjection imagesPhase shiftLoop coilEncoding settingsEncoding schemeEncoding trajectoriesLow-field MR imagingSpatial resolutionImage reconstructionOptimization algorithmEncodingMRI systemShift effectHardware setupMR systemOpen MRI systemScheme designAlgorithmImages
2016
Reorganization of brain connectivity in obesity
Geha P, Cecchi G, Constable R, Abdallah C, Small DM. Reorganization of brain connectivity in obesity. Human Brain Mapping 2016, 38: 1403-1420. PMID: 27859973, PMCID: PMC6866793, DOI: 10.1002/hbm.23462.Peer-Reviewed Original ResearchMeSH KeywordsAdultAge FactorsBrainBrain MappingEatingFemaleHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleMiddle AgedMotionNeural PathwaysObesityOxygenConceptsGlobal brain connectivityDorsal attention networkPeripheral metabolic dysfunctionHum Brain MappSuperior parietal lobuleSomatomotor cortexMetabolic dysfunctionVentrolateral prefrontal cortexPremotor areasCaudate nucleusNeurocognitive impairmentObesityAnterior hippocampusVisual cortexBrain regionsParietal lobuleBrain functionPrefrontal cortexBrain connectivityMilkshake consumptionCortexFeeding decisionsBrain organizationInsulaHomeostatic state
2008
VASO‐based calculations of CBV change: Accounting for the dynamic CSF volume
Scouten A, Constable R. VASO‐based calculations of CBV change: Accounting for the dynamic CSF volume. Magnetic Resonance In Medicine 2008, 59: 308-315. PMID: 18228581, PMCID: PMC2737703, DOI: 10.1002/mrm.21427.Peer-Reviewed Original Research
2007
Applications and limitations of whole‐brain MAGIC VASO functional imaging
Scouten A, Constable R. Applications and limitations of whole‐brain MAGIC VASO functional imaging. Magnetic Resonance In Medicine 2007, 58: 306-315. PMID: 17654574, PMCID: PMC2673534, DOI: 10.1002/mrm.21273.Peer-Reviewed Original ResearchMeSH KeywordsBlood VolumeBrain MappingCerebrovascular CirculationComputer SimulationFemaleHumansImage Processing, Computer-AssistedLinear ModelsMagnetic Resonance ImagingMaleConceptsFunctional magnetic resonance imagingCerebrospinal fluidBlood Oxygenation Level Dependent (BOLD) imagesAuditory stimulationWhole-brain functional magnetic resonance imagingActivation-induced decreaseCerebral blood volumeMagnetic resonance imagingSuperior temporal gyrusBlood volumeThree-compartment modelResonance imagingCSF contributionTemporal gyrusFunctional imagingVisual stimulation
1999
An Event-Related fMRI Study of Implicit Phrase-Level Syntactic and Semantic Processing
Kang A, Constable R, Gore J, Avrutin S. An Event-Related fMRI Study of Implicit Phrase-Level Syntactic and Semantic Processing. NeuroImage 1999, 10: 555-561. PMID: 10547332, DOI: 10.1006/nimg.1999.0493.Peer-Reviewed Original ResearchConceptsSemantic processingSemantic conditionsEvent-related fMRI paradigmEvent-related fMRI studyFunctional magnetic resonance imaging studySilent word generationMemory-related processesInferior parietal lobeAnterior cingulate gyrusMagnetic resonance imaging studyResonance imaging studyTarget stimuliTypes of discriminationWord generationBA 45FMRI paradigmOddball responseBA 44FMRI studyButton pressGrammatical judgmentOvert responseBroca's areaLanguage functionWernicke's areaComposite image formation in z‐shimmed functional MR imaging
Constable R, Spencer D. Composite image formation in z‐shimmed functional MR imaging. Magnetic Resonance In Medicine 1999, 42: 110-117. PMID: 10398956, DOI: 10.1002/(sici)1522-2594(199907)42:1<110::aid-mrm15>3.0.co;2-3.Peer-Reviewed Original ResearchArousalArtifactsBrain MappingEcho-Planar ImagingEquipment DesignHumansImage EnhancementImage Processing, Computer-AssistedMagnetic Resonance ImagingOxygenTemporal Lobe
1998
Functional disruption in the organization of the brain for reading in dyslexia
Shaywitz S, Shaywitz B, Pugh K, Fulbright R, Constable R, Mencl W, Shankweiler D, Liberman A, Skudlarski P, Fletcher J, Katz L, Marchione K, Lacadie C, Gatenby C, Gore J. Functional disruption in the organization of the brain for reading in dyslexia. Proceedings Of The National Academy Of Sciences Of The United States Of America 1998, 95: 2636-2641. PMID: 9482939, PMCID: PMC19444, DOI: 10.1073/pnas.95.5.2636.Peer-Reviewed Original ResearchMeSH KeywordsBrainBrain MappingDyslexiaHumansImage Processing, Computer-AssistedLanguageMagnetic Resonance ImagingReadingReference ValuesConceptsBrain activation patternsActivation patternsDyslexic readersFunctional disruptionFunctional magnetic resonanceAlphabetic charactersRelative underactivationPhonologic awarenessNeural signaturesPhonologic analysisSpoken wordsAnterior regionImpairmentNeural systemsPosterior regionDyslexiaMagnetic resonanceWordsOveractivationBrainPhysical and geometrical modeling for image-based recovery of left ventricular deformation
Duncan J, Shi P, Constable T, Sinusas A. Physical and geometrical modeling for image-based recovery of left ventricular deformation. Progress In Biophysics And Molecular Biology 1998, 69: 333-351. PMID: 9785945, DOI: 10.1016/s0079-6107(98)00014-5.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiomechanical PhenomenaHeartHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingModels, CardiovascularMyocardial IschemiaVentricular Dysfunction, LeftVentricular Function, Left
1997
Improved activation maps via the elimination of motion effects through time‐domain mixing of data in conventional gradient echo functional MRI
Constable R. Improved activation maps via the elimination of motion effects through time‐domain mixing of data in conventional gradient echo functional MRI. Magnetic Resonance In Medicine 1997, 38: 628-637. PMID: 9324330, DOI: 10.1002/mrm.1910380417.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsArtifactsBrainEcho-Planar ImagingHumansImage EnhancementImage Processing, Computer-AssistedMotionROC CurveSignal Processing, Computer-Assisted
1996
Auditory Selective Attention: An fMRI Investigation
Pugh K, Shaywitz B, Shaywitz S, Fulbright R, Byrd D, Skudlarski P, Shankweiler D, Katz L, Constable R, Fletcher J, Lacadie C, Marchione K, Gore J. Auditory Selective Attention: An fMRI Investigation. NeuroImage 1996, 4: 159-173. PMID: 9345506, DOI: 10.1006/nimg.1996.0067.Peer-Reviewed Original ResearchMeSH KeywordsAdultAttentionAuditory PathwaysBrain MappingCerebral CortexDichotic Listening TestsDominance, CerebralGyrus CinguliHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingPitch DiscriminationSpeech PerceptionConceptsAttention systemAnterior attention systemPosterior attention systemAuditory selective attentionInferior frontal regionsInferior frontal gyrusMiddle temporal gyrusDichotic listening conditionsSelective attentionFMRI investigationSpeech tokensPitch judgmentsFrontal gyrusListening conditionsBroca's areaTemporal gyrusNonspeech tasksHemispheric differencesFrontal regionsTone stimuliDichotic conditionsCingulate gyrusGyrusPresent experimentsTask
1995
Functional MR imaging using gradient‐echo echo‐planar imaging in the presence of large static field inhomogeneities
Constable R. Functional MR imaging using gradient‐echo echo‐planar imaging in the presence of large static field inhomogeneities. Journal Of Magnetic Resonance Imaging 1995, 5: 746-752. PMID: 8748497, DOI: 10.1002/jmri.1880050622.Peer-Reviewed Original ResearchAn roc approach for evaluating functional brain mr imaging and postprocessing protocols
Constable R, Skudlarski P, Gore J. An roc approach for evaluating functional brain mr imaging and postprocessing protocols. Magnetic Resonance In Medicine 1995, 34: 57-64. PMID: 7674899, DOI: 10.1002/mrm.1910340110.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsBrainEcho-Planar ImagingHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingROC CurveSignal Processing, Computer-Assisted
1994
Development and evaluation of tracking algorithms for cardiac wall motion analysis using phase velocity MR imaging
Constable R, Rath K, Sinusas A, Gore J. Development and evaluation of tracking algorithms for cardiac wall motion analysis using phase velocity MR imaging. Magnetic Resonance In Medicine 1994, 32: 33-42. PMID: 8084235, DOI: 10.1002/mrm.1910320106.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsAnimalsComputer SimulationDogsHeartHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingModels, CardiovascularModels, StructuralMyocardial ContractionMyocardial Infarction
1992
The Loss of Small Objects in Variable TE Imaging: Implications for FSE, RARE, and EPI
Constable R, Gore J. The Loss of Small Objects in Variable TE Imaging: Implications for FSE, RARE, and EPI. Magnetic Resonance In Medicine 1992, 28: 9-24. PMID: 1435225, DOI: 10.1002/mrm.1910280103.Peer-Reviewed Original ResearchHumansImage EnhancementImage Processing, Computer-AssistedMagnetic Resonance ImagingModels, Structural
1991
A quantitative comparison of the TERA modeling and DFT magnetic resonance image reconstruction techniques
Smith M, Nichols S, Constable R, Henkelman R. A quantitative comparison of the TERA modeling and DFT magnetic resonance image reconstruction techniques. Magnetic Resonance In Medicine 1991, 19: 1-19. PMID: 2046524, DOI: 10.1002/mrm.1910190102.Peer-Reviewed Original ResearchMeSH KeywordsAlgorithmsFourier AnalysisHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingModels, StructuralSoftwareConceptsImage reconstruction techniquesModeling techniquesData reconstructionImage reconstructionDiscrete Fourier transform algorithmReconstruction approachAlternative reconstruction methodTransform algorithmSuccess of modelingData setsReconstruction methodModeling methodFourier transform algorithmMagnetic resonance imagesData lengthReconstruction techniqueFinite data lengthResonance imagesProblem areasTruncation artifactsModelingAlgorithmArtifactsTwo-dimensional modelingOne-dimensional modeling