2024
Biomedical Engineering: Innovative Free-Range Resonant Electrical Energy Delivery System (FREE-D System) for a Ventricular Assist Device Using Wireless Power
Waters B, Smith J, Bonde P. Biomedical Engineering: Innovative Free-Range Resonant Electrical Energy Delivery System (FREE-D System) for a Ventricular Assist Device Using Wireless Power. 2024, 262-268. DOI: 10.1201/9781003543480-41.Peer-Reviewed Original ResearchAxial pumpResonant coilsTransmitting resonant coilsElectric energy deliveryMagnetically coupled resonatorsTether-free operationPower management moduleRelay coilWireless powerWireless deliveryPulsatile ventricular assist deviceReceiver unitSystem efficiencyEnergy delivery systemContinuous operationExperimental setupMechanical failureVentricular assist deviceRectifierControl boardRadiofrequency amplifierPowerCoilRegulation efficiencyEfficiencyDesign of novel loop coil array for B0 and gradient field generation
Ha Y, Samardzija A, Sun C, Sun H, Gross R, Galiana G, Constable R. Design of novel loop coil array for B0 and gradient field generation. Proceedings Of The International Society For Magnetic Resonance In Medicine ... Scientific Meeting And Exhibition. 2024 DOI: 10.58530/2024/2833.Peer-Reviewed Original Research
2023
Magnetic resonance imaging using a nonuniform Bo (NuBo) field-cycling magnet
Selvaganesan K, Wan Y, Ha Y, Wu B, Hancock K, Galiana G, Constable R. Magnetic resonance imaging using a nonuniform Bo (NuBo) field-cycling magnet. PLOS ONE 2023, 18: e0287344. PMID: 37319289, PMCID: PMC10270621, DOI: 10.1371/journal.pone.0287344.Peer-Reviewed Original ResearchConceptsInnovative data acquisitionMain magnetGradient coilsExperimental verificationEcho signalsInitial designField cyclingParallel imagingSuperior soft tissue contrastMagnetsInhomogeneous fieldsLow fieldsSoft tissue contrastReconstruction approachInhomogeneity effectsData acquisitionSpatial encodingPolarization phaseOpen MR systemPowerful noninvasive diagnostic toolSpin echo signalImage acquisitionFieldCoilNew approachEM shielded spiral RF coil design for array coil decoupling at ultra-low field MRI
Ha Y, Selvaganesan K, Sun C, Zhang Z, Samardzija A, Sun H, Galiana G, Constable T. EM shielded spiral RF coil design for array coil decoupling at ultra-low field MRI. Proceedings Of The International Society For Magnetic Resonance In Medicine ... Scientific Meeting And Exhibition. 2023 DOI: 10.58530/2023/1776.Peer-Reviewed Original ResearchMulti-echo RF spatial phase encoding for gradient-free imaging in a nonuniform B0-field at low-field
Selvaganesan K, Ha Y, Sun C, Samardzija A, Zhang Z, Sun H, Galiana G, Constable T. Multi-echo RF spatial phase encoding for gradient-free imaging in a nonuniform B0-field at low-field. Proceedings Of The International Society For Magnetic Resonance In Medicine ... Scientific Meeting And Exhibition. 2023 DOI: 10.58530/2023/0532.Peer-Reviewed Original Research
2022
Thermal effects on neurons during stimulation of the brain
Kim T, Kadji H, Whalen A, Ashourvan A, Freeman E, Fried S, Tadigadapa S, Schiff S. Thermal effects on neurons during stimulation of the brain. Journal Of Neural Engineering 2022, 19: 056029. PMID: 36126646, PMCID: PMC9855718, DOI: 10.1088/1741-2552/ac9339.Peer-Reviewed Original ResearchConceptsThermal effectsJoule heatingMagnetic coilsRate dependencyElectrical interactionsSmall thermal effectsTemperature changesDissipation of energyNumerical modelingRange of frequenciesThermal energyMagnetic fieldDC drivingMagnetic inductionElectrical currentStatic magnetic fieldSmall temperature increaseTemperature increaseAccurate modulationCoilEnergy depositionHeatingConductorsTransient effectsElectrodeDeuterium metabolic imaging of the human brain in vivo at 7 T
Roig E, De Feyter HM, Nixon TW, Ruhm L, Nikulin AV, Scheffler K, Avdievich NI, Henning A, de Graaf R. Deuterium metabolic imaging of the human brain in vivo at 7 T. Magnetic Resonance In Medicine 2022, 89: 29-39. PMID: 36063499, PMCID: PMC9756916, DOI: 10.1002/mrm.29439.Peer-Reviewed Original ResearchDesign of an asymmetric spiral RF coil for RF spatial encoding
Ha Y, Selvaganesan K, Hancock K, Galiana G, Constable R. Design of an asymmetric spiral RF coil for RF spatial encoding. Proceedings Of The International Society For Magnetic Resonance In Medicine ... Scientific Meeting And Exhibition. 2022 DOI: 10.58530/2022/3583.Peer-Reviewed Original Research
2021
Approaches in cooling of resistive coil-based low-field Magnetic Resonance Imaging (MRI) systems for application in low resource settings
Natukunda F, Twongyirwe T, Schiff S, Obungoloch J. Approaches in cooling of resistive coil-based low-field Magnetic Resonance Imaging (MRI) systems for application in low resource settings. BMC Biomedical Engineering 2021, 3: 3. PMID: 33579373, PMCID: PMC7881601, DOI: 10.1186/s42490-021-00048-6.Peer-Reviewed Original ResearchPermanent magnet technologyDedicated cooling systemLow-field magnetic resonance imaging systemsMRI systemCooling systemMagnet technologyResistive coilsMagnetic resonance imaging systemResistive magnetResonance imaging systemLow costHigh constructionMagnetsImage qualityImaging systemSystem longevityStrength capabilitiesInstallationSystemCoilStringent prerequisiteAn Unmatched Radio Frequency Chain for Low-Field Magnetic Resonance Imaging
Harper J, Zárate C, Krauch F, Muhumuza I, Molina J, Obungoloch J, Schiff S. An Unmatched Radio Frequency Chain for Low-Field Magnetic Resonance Imaging. Frontiers In Physics 2021, 9: 727536. PMID: 36213526, PMCID: PMC9536774, DOI: 10.3389/fphy.2021.727536.Peer-Reviewed Original Research
2020
Dynamic multicoil technique (DYNAMITE) MRI on human brain
Juchem C, Theilenberg S, Kumaragamage C, Mullen M, DelaBarre L, Adriany G, Brown PB, McIntyre S, Nixon TW, Garwood M, de Graaf R. Dynamic multicoil technique (DYNAMITE) MRI on human brain. Magnetic Resonance In Medicine 2020, 84: 2953-2963. PMID: 32544274, PMCID: PMC8168279, DOI: 10.1002/mrm.28323.Peer-Reviewed Original ResearchConceptsGradient coilsConventional gradient coilsField controlMagnetic field gradientImage fidelityShim systemBiot-Savart lawFirst realizationCylindrical surfaceCoil technologyGradient technologyImage distortion correctionGradient fieldGradient errorsField imperfectionsHuman headCoilGeometric deformationMR environmentField gradientLinear xDistortion correctionResolution phantomSpatial encodingNumerical integration
2019
On the magnetic field dependence of deuterium metabolic imaging
de Graaf R, Hendriks AD, Klomp DWJ, Kumaragamage C, Welting D, de Castro C, Brown PB, McIntyre S, Nixon TW, Prompers JJ, De Feyter HM. On the magnetic field dependence of deuterium metabolic imaging. NMR In Biomedicine 2019, 33: e4235. PMID: 31879985, PMCID: PMC7141779, DOI: 10.1002/nbm.4235.Peer-Reviewed Original Research
2018
SERIAL transmit – parallel receive (STxPRx) MR imaging produces acceptable proton image uniformity without compromising field of view or SAR guidelines for human neuroimaging at 9.4 Tesla
Thulborn K, Ma C, Sun C, Atkinson I, Claiborne T, Umathum R, Wright S, Liang Z. SERIAL transmit – parallel receive (STxPRx) MR imaging produces acceptable proton image uniformity without compromising field of view or SAR guidelines for human neuroimaging at 9.4 Tesla. Journal Of Magnetic Resonance 2018, 293: 145-153. PMID: 30012280, PMCID: PMC6084804, DOI: 10.1016/j.jmr.2018.05.009.Peer-Reviewed Original ResearchConceptsProton MR imagesMR images of human brainArrays of surface coilsImages of human brainSurface coil arrayHuman brain imagingImage uniformityField of viewExcitation profilesSAR guidelinesBirdcage coilFLASH pulse sequenceSensitivity correctionSodium MR imagingPulse sequenceAcceptable uniformityCoil arrayExcitationSignal-to-noiseProtonHigh-resolution imagesSurface coilParallel receiverCoilMR imaging
2014
Attenuation Correction for Flexible Magnetic Resonance Coils in Combined Magnetic Resonance/Positron Emission Tomography Imaging
Eldib M, Bini J, Calcagno C, Robson PM, Mani V, Fayad ZA. Attenuation Correction for Flexible Magnetic Resonance Coils in Combined Magnetic Resonance/Positron Emission Tomography Imaging. Investigative Radiology 2014, 49: 63-69. PMID: 24056110, PMCID: PMC4011564, DOI: 10.1097/rli.0b013e3182a530f8.Peer-Reviewed Original ResearchConceptsMagnetic resonance coilVolume splineResonance coilsMR coilPhantom experimentsSuch coilsUniform cylindrical water phantomMR/PET systemAttenuation propertiesCoilLocal overestimationAttenuation mapFlexible coilCylindrical water phantomPhantom findingsLocal underestimationRegistration methodAccurate measurementField of viewCT-based attenuation mapPhantom scansWater phantomAttenuation correctionSurfaceNovel method
2005
Invasive human magnetic resonance imaging: Feasibility during revascularization in a combined XMR suite
Dick AJ, Raman VK, Raval AN, Guttman MA, Thompson RB, Ozturk C, Peters DC, Stine AM, Wright VJ, Schenke WH, Lederman RJ. Invasive human magnetic resonance imaging: Feasibility during revascularization in a combined XMR suite. Catheterization And Cardiovascular Interventions 2005, 64: 265-274. PMID: 15736247, PMCID: PMC1317610, DOI: 10.1002/ccd.20302.Peer-Reviewed Original ResearchConceptsInvasive magnetic resonance imagingMagnetic resonance imagingIntravascular ultrasoundPeripheral angioplastyReal-time magnetic resonance imagingTherapeutic proceduresActive guidewireReceiver coilNoninvasive magnetic resonance imagingX-ray fluoroscopyMRI coilsAdvanced therapeutic proceduresIntravascular magnetic resonance imagingArtery revascularizationEligible patientsDiagnostic catheterizationRevascularization proceduresDevice dislodgmentNephrotoxic contrastPatientsResonance imagingCoilCatheter deviceGuidewire visualizationSoft tissue
2002
Catheter-Based Endomyocardial Injection With Real-Time Magnetic Resonance Imaging
Lederman RJ, Guttman MA, Peters DC, Thompson RB, Sorger JM, Dick AJ, Raman VK, McVeigh ER. Catheter-Based Endomyocardial Injection With Real-Time Magnetic Resonance Imaging. Circulation 2002, 105: 1282-1284. PMID: 11901036, PMCID: PMC1317571, DOI: 10.1161/circ.105.11.1282.Peer-Reviewed Original ResearchConceptsReal-time MRIMRI-compatible needleFirst generation prototypeRtMRI guidanceEndomyocardial injectionNeedle injectorReconstruction engineLeft ventricular cavityMagnetic resonance imagingTime magnetic resonance imagingMyocardial segmentsT MRI scannerVentricular cavityGadolinium-DTPAResonance imagingDrug deliveryLV wallCatheter navigationMultiple injectionsInjectionInjectorEngineMRI scannerCoilImaging softwareHigh Resolution MR Microimaging of Neuronal Tissue at 17.6 T
Grant S, Benveniste H, Blackband S. High Resolution MR Microimaging of Neuronal Tissue at 17.6 T. 2002, 2: 1209-1210. DOI: 10.1109/iembs.2002.1106352.Peer-Reviewed Original Research
1992
Multicoil high-resolution fast spin-echo MR imaging of the female pelvis.
Smith R, Reinhold C, McCauley T, Lange R, Constable R, Kier R, McCarthy S. Multicoil high-resolution fast spin-echo MR imaging of the female pelvis. Radiology 1992, 184: 671-5. PMID: 1324508, DOI: 10.1148/radiology.184.3.1324508.Peer-Reviewed Original ResearchPelvic phased array coil: Image quality assessment for spin-echo MR imaging
McCauley T, McCarthy S, Lange R. Pelvic phased array coil: Image quality assessment for spin-echo MR imaging. Magnetic Resonance Imaging 1992, 10: 513-522. PMID: 1501521, DOI: 10.1016/0730-725x(92)90002-h.Peer-Reviewed Original Research
1989
Natural-abundance 13C NMR study of glycogen repletion in human liver and muscle.
Jue T, Rothman D, Tavitian B, Shulman R. Natural-abundance 13C NMR study of glycogen repletion in human liver and muscle. Proceedings Of The National Academy Of Sciences Of The United States Of America 1989, 86: 1439-1442. PMID: 2922392, PMCID: PMC286711, DOI: 10.1073/pnas.86.5.1439.Peer-Reviewed Original Research
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