Explicit treatment of mutual inductance in eight-column birdcage resonators.

abstract：:To acquire high-resolution T(1)-weighted images of the liver in rats, for which breath-holding cannot be ensured, respiratory triggering is essential. At the respiratory rate of 30-60 times/min in rats, however, T(1)-weighted images cannot be obtained with simple triggering. As a simple solution to this, we applied mu...

journal_title：Magnetic resonance imaging

authors： Morikawa S,Murayama H,Fujimoto S,Shiino A,Inubushi T

更新日期：2012-04-01 00:00:00

abstract：:Laplace inversion has been widely used in analyzing nuclear magnetic resonance data to obtain a spectrum of decay time constant, such as the T(2) spectrum. However, due to the ill-conditioned nature of such inversion, it is difficult to determine the reliability and error of the resulting spectrum. This article descri...

journal_title：Magnetic resonance imaging

authors： Song YQ

更新日期：2007-05-01 00:00:00

abstract：:Disseminated osseous tuberculosis is a rare disease. This is a report of two cases of disseminated osseous tuberculosis imaged with MRI at 1.5-T, CT, plain radiography and bone scintigraphy. CT and plain radiography demonstrated either highly destructive or cystic lesions with sclerotic margins. Bone scintigraphy and ...

journal_title：Magnetic resonance imaging

authors： Quinn SF,Murray W,Prochaska J,Cochran C,Clark R

更新日期：1987-01-01 00:00:00

abstract：:Parallel excitation using multiple transmit channels has emerged as an effective method to shorten multidimensional spatially selective radiofrequency (RF) pulses, which have a number of important applications, including B1 field inhomogeneity correction in high-field MRI. The specific absorption rate (SAR) is a prima...

journal_title：Magnetic resonance imaging

authors： Liu Y,Feng K,McDougall MP,Wright SM,Ji J

更新日期：2008-10-01 00:00:00

abstract：:Focal brain ischemia was induced by middle cerebral artery occlusion in the rat. The volume of cerebral damage was determined 2 days later by MRI in vivo and in the same animals histologically. The edema volume as measured by MRI and the histologically determined infarction was highly correlated. As a consequence, the...

journal_title：Magnetic resonance imaging

authors： Allegrini PR,Sauer D

更新日期：1992-01-01 00:00:00

abstract：:We report the first application of a novel diffusion-based MRI method, called diffusional kurtosis imaging (DKI), to investigate changes in brain tissue microstructure in patients with mild cognitive impairment (MCI) and AD and in cognitively intact controls. The subject groups were characterized and compared in terms...

journal_title：Magnetic resonance imaging

authors： Falangola MF,Jensen JH,Tabesh A,Hu C,Deardorff RL,Babb JS,Ferris S,Helpern JA

更新日期：2013-07-01 00:00:00

abstract：:Blood oxygenation level-dependent (BOLD) functional magnetic resonance imaging (fMRI) is currently the dominant technique for non-invasive investigation of brain functions. One of the challenges with BOLD fMRI, particularly at high fields, is compensation for the effects of spatiotemporally varying magnetic field inho...

journal_title：Magnetic resonance imaging

authors： Barry RL,Williams JM,Klassen LM,Gallivan JP,Culham JC,Menon RS

更新日期：2010-02-01 00:00:00

abstract：:Deep brain stimulation (DBS) is used increasingly in the field of movement disorders. The implanted electrodes create not only a prior risk to patient safety during MRI, but also a unique opportunity in the collection of functional MRI data conditioned by direct neural stimulation. We evaluated MRI-related heating for...

journal_title：Magnetic resonance imaging

authors： Bhidayasiri R,Bronstein JM,Sinha S,Krahl SE,Ahn S,Behnke EJ,Cohen MS,Frysinger R,Shellock FG

更新日期：2005-05-01 00:00:00

abstract：:We compared the ability and reproducibility of a fast fluid-attenuated inversion recovery (fast-FLAIR) sequence with and without a magnetization transfer (MT) pulse for detecting and measuring multiple sclerosis (MS)-related abnormalities on magnetic resonance imaging (MRI) scans from 20 patients. The Contrast-to-Nois...

journal_title：Magnetic resonance imaging

authors： Filippi M,Rocca MA,Mastronardo G,Comi G

更新日期：1999-04-01 00:00:00

abstract：:Brain vascular damage accumulate in aging and often manifest as white matter hyperintensities (WMHs) on MRI. Despite increased interest in automated methods to segment WMHs, a gold standard has not been achieved and their longitudinal reproducibility has been poorly investigated. The aim of present work is to evaluate...

journal_title：Magnetic resonance imaging

authors： Ribaldi F,Altomare D,Jovicich J,Ferrari C,Picco A,Pizzini FB,Soricelli A,Mega A,Ferretti A,Drevelegas A,Bosch B,Müller BW,Marra C,Cavaliere C,Bartrés-Faz D,Nobili F,Alessandrini F,Barkhof F,Gros-Dagnac H,Ranjeva JP

更新日期：2021-02-01 00:00:00

abstract：:The subthalamic nucleus (STN) is one of the most common stimulation targets for treating Parkinson's disease using deep brain stimulation (DBS). This procedure requires precise placement of the stimulating electrode. Common practice of DBS implantation utilizes microelectrode recording to locate the sites with the cor...

journal_title：Magnetic resonance imaging

authors： Xiao Y,Beriault S,Pike GB,Collins DL

更新日期：2012-06-01 00:00:00

abstract：PURPOSE:To evaluate the feasibility of an optimized bright blood MRI protocol at 3 T in combination with contrast agent administration for the detection and characterization of aortic high-risk plaques for the improved workup of acute stroke patients. MATERIALS AND METHODS:ECG synchronized T1-weighted 3D gradient echo...

journal_title：Magnetic resonance imaging

authors： Markl M,Dudler P,Fydrychowicz A,Strecker C,Weiller C,Hennig J,Harloff A

更新日期：2008-04-01 00:00:00

abstract：:We present the case of a 44-year-old man who complained of cervical pain. He was treated with physiotherapy and analgetics. Because of persistent pain, computed tomography (CT) scan and MRI were performed. They revealed an osteolytic destruction of the fourth cervical vertebra. The patient was treated surgically for r...

journal_title：Magnetic resonance imaging

authors： Simanski C,Bouillon B,Brockmann M,Tiling T

更新日期：2004-05-01 00:00:00

abstract：:3D (kx, ky, t)-space analysis is invoked to provide insights into dynamic magnetic resonance imaging (DMRI) with arbitrary k-space sampling trajectories. The effects of 3D sampling in (kx, ky, t) are analyzed theoretically and verified with computer simulation. The analyses show that a 3D sampling pattern that is more...

journal_title：Magnetic resonance imaging

authors： Park JB,Nishimura DG

更新日期：2006-10-01 00:00:00

abstract：:A new approach to solid-state imaging (SSI) is presented. The method relies on narrowing the resonance line using the Lee-Goldburg sequence. The technique is easy to implement in practice and may find widespread applications in materials science. ...

journal_title：Magnetic resonance imaging

authors： De Luca F,Lugeri N,De Simone BC,Maraviglia B

更新日期：1992-01-01 00:00:00

abstract：:The polysplenia syndrome is the association of multiple spleens, situs inversus, congenital heart disease, and azygous continuation of the inferior vena cava. Magnetic resonance (MR) is a noninvasive imaging modality which can easily confirm the multiplicity of spleens, situs inversus, and identify complex congenital ...

journal_title：Magnetic resonance imaging

authors： Jelinek JS,Stuart PL,Done SL,Ghaed N,Rudd SA

更新日期：1989-11-01 00:00:00

abstract：:Dynamic and static gadolinium-diethylenetriaminepentaacetic acid(Gd-DTPA)-enhanced magnetic resonance imaging (MRI) were evaluated as measures of joint inflammation in arthritis, by a comparison with macroscopic and microscopic signs of synovitis. Furthermore, the importance of the size of the evaluated synovial areas...

journal_title：Magnetic resonance imaging

authors： Ostergaard M,Stoltenberg M,Løvgreen-Nielsen P,Volck B,Sonne-Holm S,Lorenzen I

更新日期：1998-09-01 00:00:00

abstract：PURPOSE:To evaluate the use of the double-echo steady-state (DESS) sequence for acquiring high-resolution breast images with diffusion and T2 weighting. MATERIALS AND METHODS:Phantom scans were used to verify the T2 and diffusion weighting of the DESS sequence. Image distortion was evaluated in volunteers by comparing...

journal_title：Magnetic resonance imaging

authors： Granlund KL,Staroswiecki E,Alley MT,Daniel BL,Hargreaves BA

更新日期：2014-05-01 00:00:00

abstract：:Etched particle tracks produced after heavy ion irradiation of polymer foils are used as model systems to test the performance of NMR in a newly developed ultrahigh magnetic field gradient system. The stimulated NMR echo decay of molecules diffusing in the channels, formulated in terms of the self part of the intermed...

journal_title：Magnetic resonance imaging

authors： Fujara F,Ilyina E,Nienstaedt H,Sillescu H,Spohr R,Trautmann C

更新日期：1994-01-01 00:00:00

abstract：:A technique for obtaining quantitative longitudinal saturation/porosity profiles of rock cores which are longer than the NMR coil has been developed. The slice-selected experiment uses a prefocused pulse in conjunction with a magnetic field gradient for the localization and a CPMG sequence to sample the data. A variet...

journal_title：Magnetic resonance imaging

authors： Pierens GK,Peyron M,Lucas AJ,Carpenter TA,Hall LD,Potter GF,Stewart RC,Phelps DW

更新日期：1994-01-01 00:00:00

abstract：BACKGROUND AND PURPOSE:Diffusion MRI characteristics have been used as biomarkers to guide prognosis in cerebral pathologies including brain metastases. The measurement of ADC is often described poorly in clinical and research studies with little detail given to the practical considerations of where to place ROIs, whic...

journal_title：Magnetic resonance imaging

authors： Zakaria R,Das K,Bhojak M,Radon M,Sluming V,Walker C,Jenkinson MD

更新日期：2014-04-01 00:00:00

abstract：:The purpose of this study was to analyze background parenchymal enhancement (BPE) in the contralateral normal breast of cancer patients during the course of neoadjuvant chemotherapy (NAC). Forty-five subjects were analyzed. Each patient had three MRIs, one baseline (B/L) and two follow-up (F/U) studies. The fibrogland...

journal_title：Magnetic resonance imaging

authors： Chen JH,Yu H,Lin M,Mehta RS,Su MY

更新日期：2013-11-01 00:00:00

abstract：PURPOSE:Our study aimed to develop accelerated microscopic diffusional kurtosis imaging (μDKI) and preliminarily evaluated it in a rodent model of chronic epilepsy. METHODS:We investigated two μDKI acceleration schemes of reduced sampling density and angular range in a phantom and wild-type rats, and further tested μD...

journal_title：Magnetic resonance imaging

authors： Ji Y,Lu D,Wu L,Qiu B,Song YQ,Sun PZ

更新日期：2019-02-01 00:00:00

abstract：:In magnetic resonance elastography (MRE), shear waves at a certain frequency are encoded through bipolar gradients that switch polarity at a controlled encoding frequency and are offset in time to capture wave propagation using a controlled sampling frequency. In brain MRE, there is a possibility that the mechanical a...

journal_title：Magnetic resonance imaging

authors： Johnson CL,Chen DD,Olivero WC,Sutton BP,Georgiadis JG

更新日期：2012-02-01 00:00:00

abstract：:1H Magnetic resonance imaging and 31P magnetic resonance spectroscopy (MRS) have been carried out in experimental rodent filariasis, i.e., Acanthocheilonema viteae infection in the rodent host, Mastomys coucha. The T2-weighted image of the infected host shows fine hyperintense thread like structures of adult filariid ...

journal_title：Magnetic resonance imaging

authors： Shukla-Dave A,Fatma N,Roy R,Srivastava S,Chatterjee RK,Govindaraju V,Viswanathan AK,Raghunathan P

更新日期：1997-01-01 00:00:00

abstract：OBJECTIVE:This study aims to evaluate the applicability of using single-shot and multi-shot segmented diffusion-weighted imaging (DWI) techniques to support biopsy target localization in a cohort of targeted MRI-guided prostate biopsy patients. MATERIALS AND METHODS:Single-shot echo-planar diffusion-weighted imaging (...

journal_title：Magnetic resonance imaging

authors： Fedorov A,Tuncali K,Panych LP,Fairhurst J,Hassanzadeh E,Seethamraju RT,Tempany CM,Maier SE

更新日期：2016-10-01 00:00:00

abstract：:Stimulated spin-echo and Carr-Purcell pulse sequences, with pulsed magnetic field gradients, have been used to study the self-diffusion processes of the water in swollen and in supercoiled polyacrylamide gels and in polysaccharides agarose gels, for different polymer concentrations. Restricted diffusion effects are ev...

journal_title：Magnetic resonance imaging

authors： Pavesi L,Balzarini M

更新日期：1996-01-01 00:00:00

abstract：:Non-invasive assessment of cartilage properties, specifically water content, could prove helpful in the diagnosis of early degenerative joint diseases. Transverse relaxation times T(2) of human articular cartilage (34 cartilage slices of three donors) were measured on a pixel-by-pixel basis in a clinical whole body MR...

journal_title：Magnetic resonance imaging

authors： Lüsse S,Claassen H,Gehrke T,Hassenpflug J,Schünke M,Heller M,Glüer CC

更新日期：2000-05-01 00:00:00

abstract：PURPOSE:To systematically investigate the scan-rescan, intra-observer, and inter-observer reproducibility of an improved DANTE-SPACE sequence for the simultaneous assessment of intra- and extracranial arterial vessel wall morphology. MATERIALS AND METHODS:Thirty-five healthy volunteers and 10 patients with atheroscler...

journal_title：Magnetic resonance imaging

authors： Wan L,Zhang N,Zhang L,Long X,Jia S,Li Y,Liang D,Zheng H,Liu X

更新日期：2019-10-01 00:00:00

abstract：:Current fast imaging techniques are based on gradient echo sequences with reduced flip angle excitation pulses and very short repetition times TR. Practical T2 values may be of the order of TR or longer. In this situation, a different image contrast can be obtained, depending on details of the sequence. Four essential...

journal_title：Magnetic resonance imaging

authors： van der Meulen P,Groen JP,Tinus AM,Bruntink G

更新日期：1988-07-01 00:00:00