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 ResearchConceptsAlternating 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 function
1999
Composite 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 Research
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 ResearchMotion artifact in T2‐weighted fast spin‐echo images of the liver: Effect on image contrast and reduction of artifact using respiratory triggering in normal volunteers
Choe K, Smith R, Wilkens K, Constable R. Motion artifact in T2‐weighted fast spin‐echo images of the liver: Effect on image contrast and reduction of artifact using respiratory triggering in normal volunteers. Journal Of Magnetic Resonance Imaging 1997, 7: 298-302. PMID: 9090581, DOI: 10.1002/jmri.1880070207.Peer-Reviewed Original ResearchMeSH KeywordsAdultArtifactsEcho-Planar ImagingFemaleHumansImage EnhancementLiverMaleMovementReference ValuesRespirationSensitivity and SpecificityConceptsFast spin-echo imagesSpin-echo imagesMultiple small cystsT2-weighted sequencesSpin-echo T2-weighted sequencesPatient triggeringFast spin-echo T2-weighted sequencesT2-weighted fast spin-echo imagesHealthy volunteersSmall cystsNormal volunteersRespiratory motionLiverRespiratory cycleCystsVolunteersGallbladderSpleenRespiratory triggeringImproved visualizationMotion artifactsSD/NSignificant improvementFlow compensationIndividual cysts
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 Research
1994
Functional NMR imaging using fast spin echo at 1.5 T
Constable R, Kennan R, Puce A, McCarthy G, Gore J. Functional NMR imaging using fast spin echo at 1.5 T. Magnetic Resonance In Medicine 1994, 31: 686-690. PMID: 8057823, DOI: 10.1002/mrm.1910310617.Peer-Reviewed Original ResearchBOLD MRI monitoring of changes in cerebral perfusion induced by acetazolamide and hypercarbia in the rat
Graham G, Zhong J, Petroff O, Constable R, Prichard J, Gore J. BOLD MRI monitoring of changes in cerebral perfusion induced by acetazolamide and hypercarbia in the rat. Magnetic Resonance In Medicine 1994, 31: 557-560. PMID: 8015411, DOI: 10.1002/mrm.1910310514.Peer-Reviewed Original ResearchConceptsApparent diffusion coefficientNormal human subjectsMRI changesCerebral perfusionCerebrovascular reserveCerebrovascular diseaseAnatomic mappingRatsMRI monitoringSignificant decreaseHuman subjectsMRI methodsMRI signalHypercarbiaPatientsInhalationPerfusionReactivity patternsAcetazolamideDiseaseAdministrationFast Spin Echo STIR Imaging
Smith R, Constable R, Reinhold C, McCauley T, Lange R, McCarthy S. Fast Spin Echo STIR Imaging. Journal Of Computer Assisted Tomography 1994, 18: 209-213. PMID: 8126269, DOI: 10.1097/00004728-199403000-00007.Peer-Reviewed Original Research
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 Research
1991
Contrast, Resolution, and Detectability in MR Imaging
Constable R, Henkelman R. Contrast, Resolution, and Detectability in MR Imaging. Journal Of Computer Assisted Tomography 1991, 15: 297-303. PMID: 2002111, DOI: 10.1097/00004728-199103000-00021.Peer-Reviewed Original ResearchData extrapolation for truncation artifact removal
Constable R, Henkelman R. Data extrapolation for truncation artifact removal. Magnetic Resonance In Medicine 1991, 17: 108-118. PMID: 2067388, DOI: 10.1002/mrm.1910170115.Peer-Reviewed Original Research
1990
Why MEM does not work in MR image reconstruction
Constable R, Henkelman R. Why MEM does not work in MR image reconstruction. Magnetic Resonance In Medicine 1990, 14: 12-25. PMID: 2191178, DOI: 10.1002/mrm.1910140103.Peer-Reviewed Original Research
1989
High Quality Zoomed MR Images
Constable R, Kay I, Smith M, Henkelman R. High Quality Zoomed MR Images. Journal Of Computer Assisted Tomography 1989, 13: 179-181. PMID: 2910942, DOI: 10.1097/00004728-198901000-00046.Peer-Reviewed Original Research