Dynamic activity-induced manganese-dependent contrast magnetic resonance imaging (DAIM MRI).

abstract：:A previously developed eigenvector formalism is adapted to off-resonance in the transient response of quasiperiodic steady-state free precession (SSFP) sequences, including TrueFISP as a special case. The effective relaxation rates for essentially parallel and perpendicular deviations from the steady state are determi...

journal_title：Magnetic resonance in medicine

authors： Ganter C

更新日期：2004-08-01 00:00:00

abstract：:Magnetic resonance (MR) can offer a unique window on the structure/function relationships in the brain, by utilizing the established link between tissue function, metabolism, and hemodynamics. This report focuses on recent applications of MR-based cerebral blood volume (CBV) imaging in humans. Our methodology uses hig...

journal_title：Magnetic resonance in medicine

authors： Rosen BR,Belliveau JW,Aronen HJ,Kennedy D,Buchbinder BR,Fischman A,Gruber M,Glas J,Weisskoff RM,Cohen MS

更新日期：1991-12-01 00:00:00

abstract：:A gradient coil design algorithm capable of controlling the position of the homogeneous region of interest (ROI) with respect to the current-carrying wires is required for many advanced imaging and spectroscopy applications. A modified minimum inductance target field method that allows the placement of a set of constr...

journal_title：Magnetic resonance in medicine

authors： Chronik BA,Rutt BK

更新日期：1998-02-01 00:00:00

abstract：PURPOSE:Conventional fat/water separation techniques require that patients hold breath during abdominal acquisitions, which often fails and limits the achievable spatial resolution and anatomic coverage. This work presents a novel approach for free-breathing volumetric fat/water separation. METHODS:Multiecho data are ...

journal_title：Magnetic resonance in medicine

authors： Benkert T,Feng L,Sodickson DK,Chandarana H,Block KT

更新日期：2017-08-01 00:00:00

abstract：:The effects of macroscopic background field gradients upon 2D gradient echo images of inhaled (3)He in the human lung were investigated at 1.5 T. Effective compensation of in-slice signal loss in (3)He gradient echo images was then demonstrated using a multiple acquisition interleaved single gradient echo sequence. Th...

journal_title：Magnetic resonance in medicine

authors： Wild JM,Fichele S,Woodhouse N,Paley MN,Swift A,Kasuboski L,van Beek EJ

更新日期：2003-08-01 00:00:00

abstract：:A pulse sequence is presented for obtaining a single image with combined T1/T2 weighting. T2 relaxation is made to increase intensity, in cooperation with the effect of T1 relaxation, by providing T2 weighting with a 90 degrees-180 degrees-90 degrees driven inversion pulse triplet in an inversion recovery method. Unli...

journal_title：Magnetic resonance in medicine

authors： Conturo TE,Kessler RM,Beth AH

更新日期：1990-09-01 00:00:00

abstract：PURPOSE:Magnetic susceptibility is a physical property of matter that varies depending on chemical composition and abundance of different molecular species. Interest is growing in mapping of magnetic susceptibility in the human brain using magnetic resonance imaging techniques, but the influences affecting the mapped v...

journal_title：Magnetic resonance in medicine

authors： Sood S,Urriola J,Reutens D,O'Brien K,Bollmann S,Barth M,Vegh V

更新日期：2017-05-01 00:00:00

abstract：:Genetically engineered mouse models provide enormous potential for investigation of the underlying mechanisms of atherosclerotic disease, but noninvasive imaging methods for analysis of atherosclerosis in mice are currently limited. This study aimed to demonstrate the feasibility of MRI to noninvasively visualize athe...

journal_title：Magnetic resonance in medicine

authors： Wiesmann F,Szimtenings M,Frydrychowicz A,Illinger R,Hunecke A,Rommel E,Neubauer S,Haase A

更新日期：2003-07-01 00:00:00

abstract：PURPOSE:To introduce a multiplatform, Python language-based, development environment called graphical programming interface for prototyping MRI techniques. METHODS:The interface allows developers to interact with their scientific algorithm prototypes visually in an event-driven environment making tasks such as paramet...

journal_title：Magnetic resonance in medicine

authors： Zwart NR,Pipe JG

更新日期：2015-11-01 00:00:00

abstract：:Four-dimensional (4D) flow imaging has been used to study flow patterns and pathophysiology, usually focused on specific thoracic vessels and cardiac chambers. Whole-heart 4D flow at high measurement accuracy covering the entire thoracic cardiovascular system would be desirable to simplify and improve hemodynamic asse...

journal_title：Magnetic resonance in medicine

authors： Uribe S,Beerbaum P,Sørensen TS,Rasmusson A,Razavi R,Schaeffter T

更新日期：2009-10-01 00:00:00

abstract：:This study examines the effect of feature extraction methods prior to automated pattern recognition based on magnetic resonance spectroscopy (MRS) for brain tumor diagnosis. Since individual inspection of spectra is time-consuming and requires specific spectroscopic expertise, the introduction of clinical decision sup...

journal_title：Magnetic resonance in medicine

authors： Luts J,Poullet JB,Garcia-Gomez JM,Heerschap A,Robles M,Suykens JA,Van Huffel S

更新日期：2008-08-01 00:00:00

abstract：PURPOSE:In diffusion MRI, the actual b-value played out on the scanner may deviate from the nominal value due to magnetic field imperfections. A simple image-based correction method for this problem is presented. METHODS:The apparent diffusion constant (ADC) of a water phantom was measured voxel-wise along 64 diffusio...

journal_title：Magnetic resonance in medicine

authors： Lee Y,Kettinger AO,Wilm BJ,Deichmann R,Weiskopf N,Lambert C,Pruessmann KP,Nagy Z

更新日期：2020-06-01 00:00:00

abstract：PURPOSE:To determine whether neurochemical concentrations obtained at two MRI sites using clinical 3T scanners can be pooled when a highly optimized, nonvendor short-echo, single-voxel proton MRS pulse sequence is used in conjunction with identical calibration and quantification procedures. METHODS:A modified semi-LAS...

journal_title：Magnetic resonance in medicine

authors： Deelchand DK,Adanyeguh IM,Emir UE,Nguyen TM,Valabregue R,Henry PG,Mochel F,Öz G

更新日期：2015-05-01 00:00:00

abstract：:Cardiac metabolism was studied with 31P NMR in 7 dogs and 4 cats to determine whether animals adapted for different life-styles (stalk and sprint vs endurance running) respond to increased work loads (heart rate X blood pressure product) with different high-energy phosphate kinetics. Hearts were exposed via a left lat...

journal_title：Magnetic resonance in medicine

authors： Ligeti L,Osbakken MD,Clark BJ,Schnall M,Bolinger L,Subramanian H,Leigh JS,Chance B

更新日期：1987-02-01 00:00:00

abstract：:Coronal proton and sodium images of control rats and rats with either increased permeability edema produced by intravenous alloxan (300 mg/kg) or increased pressure edema produced by saline infusion (2 ml/min) were obtained. Axial chest CT images were used to monitor the development of pulmonary edema. Immediately aft...

journal_title：Magnetic resonance in medicine

authors： Kundel HL,Shetty A,Joseph PM,Summers RM,Kassab EA,Moore B

更新日期：1988-04-01 00:00:00

abstract：:Continuously moving table (CMT) MRI is a new method that is capable of generating 3D, seamless, large field-of-view (FOV) images by acquiring readouts along the patient superior-inferior axis as the subject is translated through the scanner. For applications that require artifact-free images, such as arterial-phase co...

journal_title：Magnetic resonance in medicine

authors： Sabati M,Lauzon ML,Mahallati H,Frayne R

更新日期：2006-05-01 00:00:00

abstract：PURPOSE:Image-guided prostate biopsies are routinely acquired in the diagnosis and treatment monitoring of prostate cancer, yielding useful tissue for identifying metabolic biomarkers and therapeutic targets. We developed an optimized biopsy tissue culture protocol in combination with [1,6-13 C2 ]glucose labeling and q...

journal_title：Magnetic resonance in medicine

authors： Bancroft Brown J,Sriram R,VanCriekinge M,Delos Santos R,Sun J,Delos Santos J,Tabatabai ZL,Shinohara K,Nguyen H,Peehl DM,Kurhanewicz J

更新日期：2019-08-01 00:00:00

abstract：:Metabolite signals with short T(1) or T(2) are difficult to localize with full sensitivity. This limitation was overcome with the development and implementation of a single-shot, complete three-dimensional "non-echo" localization method with reduced sensitivity to spatial B(1) variation, which is suitable for measurin...

journal_title：Magnetic resonance in medicine

authors： Choi IY,Tkác I,Gruetter R

更新日期：2000-09-01 00:00:00

abstract：:A computer simulation program capable of demonstrating various artifacts, such as image distortion caused by metallic implants in MR imaging, is presented. The structure of the program allows for the implementation of various imaging situations as long as spins only experience weak interaction, i.e., the Bloch equatio...

journal_title：Magnetic resonance in medicine

authors： Olsson MB,Wirestam R,Persson BR

更新日期：1995-10-01 00:00:00

abstract：PURPOSE:To characterize and optimize 19 F MRI for different perfluorocarbons (PFCs) at 3T and quantify the loss of acquisition efficiency as a function of different temperature and cellular conditions. METHODS:The T1 and T2 relaxation times of the commonly used PFCs perfluoropolyether (PFPE), perfluoro-15-crown-5-ethe...

journal_title：Magnetic resonance in medicine

authors： Colotti R,Bastiaansen JAM,Wilson A,Flögel U,Gonzales C,Schwitter J,Stuber M,van Heeswijk RB

更新日期：2017-06-01 00:00:00

abstract：PURPOSE:Due to host-mediated adverse reaction to metallic debris, there is an increasing need for noninvasive assessment of the soft tissue surrounding large joint arthroplasties. Quantitative T 2 ...

journal_title：Magnetic resonance in medicine

authors： Bhave S,Koff MF,Sivaram Kaushik S,Potter HG,Koch KM

更新日期：2019-08-01 00:00:00

abstract：:Emerging applications of sodium bioscales derived from quantitative sodium magnetic resonance imaging assess temporal changes in regional sodium concentration over intervals that vary from hours (monitoring tissue viability in stroke) to weeks (monitoring brain tumor treatment during radiation therapy) or even years (...

journal_title：Magnetic resonance in medicine

authors： Atkinson IC,Lu A,Thulborn KR

更新日期：2012-09-01 00:00:00

abstract：:A method is described for the correction of geometric distortions occurring in echo planar images. The geometric distortions are caused in large part by static magnetic field inhomogeneities, leading to pixel shifts, particularly in the phase encode direction. By characterizing the field inhomogeneities from a field m...

journal_title：Magnetic resonance in medicine

authors： Jezzard P,Balaban RS

更新日期：1995-07-01 00:00:00

abstract：:Strong, extensive magnetic fringe fields are a significant problem with magnetic resonance imaging magnets. This is particularly acute with 4-T, whole-body research magnets. To date this problem has been addressed by restricting an extensive zone around the unshielded magnet or by placing external unsaturated iron shi...

journal_title：Magnetic resonance in medicine

authors： Huson FR,Bryan RN,MacKay WW,Herrick RC,Colvin J,Ford JJ,Pissanetzky S,Plishker GA,Rocha R,Schmidt W

更新日期：1993-01-01 00:00:00

abstract：:Rapid flow imaging was achieved with a partial field of view (pFOV) spiral motion-encoded technique. The FOV and the acquisition time were reduced by a factor of 2 by undersampling k-space. The pFOV spiral k-space trajectory aliased signals from outside a circular ring whose radius was inversely proportional to the di...

journal_title：Magnetic resonance in medicine

authors： Nezafat R,Thompson RB,Derbyshire JA,McVeigh ER

更新日期：2006-09-01 00:00:00

abstract：:The exponential clearance rate constant, (kappa), and filtration fraction (FF) have been measured for dialysis of Gadolinium-diethylenetriaminepentaacetic acid (Gd-DTPA) (Magnevist, Berlex, Wayne, NJ) solutions by using a Look-Locker imaging technique under conditions of flow. The measured values of kappa for the Baxt...

journal_title：Magnetic resonance in medicine

authors： Niendorf ER,Santyr GE,Brazy PC,Grist TM

更新日期：1996-10-01 00:00:00

abstract：:Recovery of the cerebral cortex after 10 min of cardiac arrest was studied in rat using noninvasive MRI techniques. The apparent diffusion coefficient (ADC) of brain water was imaged to document reversal of the metabolic impairment. Perfusion-weighted imaging and blood oxygen level dependent (BOLD) imaging were perfor...

journal_title：Magnetic resonance in medicine

authors： Schmitz B,Bock C,Hoehn-Berlage M,Kerskens CM,Böttiger BW,Hossmann KA

更新日期：1998-05-01 00:00:00

abstract：PURPOSE:To develop and validate a data processing technique that allows phase-contrast MRI-based 4D flow imaging of the aortic valve in a single breath-hold. THEORY AND METHODS:To regularize the ill-posed inverse problem, we extend a recently proposed 2D phase-contrast MRI method to 4D flow imaging. Adopting an empiri...

journal_title：Magnetic resonance in medicine

authors： Rich A,Potter LC,Jin N,Liu Y,Simonetti OP,Ahmad R

更新日期：2019-02-01 00:00:00

abstract：PURPOSE:To separate the spectrally overlapped lactate and lipid signals at 1.3 ppm using diffusion-weighted magnetic resonance spectroscopy (DW-MRS) based on their large diffusivity difference. METHODS:DW-MRS was applied to the gel phantoms containing lactate and lipid droplets, and to the rat brain tumors. Lactate an...

journal_title：Magnetic resonance in medicine

authors： Wang AM,Leung GK,Kiang KM,Chan D,Cao P,Wu EX

更新日期：2017-02-01 00:00:00

abstract：PURPOSE:The aim of this study was to compare prospective head motion correction and motion tracking abilities of two tracking systems: Active NMR field probes and a Moiré phase tracking camera system using an optical marker. METHODS:Both tracking systems were used simultaneously on human subjects. The prospective head...

journal_title：Magnetic resonance in medicine

authors： Eschelbach M,Aghaeifar A,Bause J,Handwerker J,Anders J,Engel EM,Thielscher A,Scheffler K

更新日期：2019-01-01 00:00:00