In vivo MR evaluation of Gd-DTPA conjugated to dextran in normal rabbits.

abstract：:We compared the efficacy of rapidly acquired magnetization prepared gradient-echo (MP-GRE) sequences with CT and standard MRI pulse sequences for the detection of focal liver lesions. Fourteen patients with 28 focal liver lesions were scanned. TI times of 300, 450, and 600 ms were used. MP-GRE lesion conspicuity was c...

journal_title：Magnetic resonance imaging

authors： Winter TC 3rd,Freeny PC,Nghiem HV,Thomas CR Jr

更新日期：1994-01-01 00:00:00

abstract：:Trabecular bone structure and bone density contribute to the strength of bone and are important in the study of osteoporosis. Wavelets are a powerful tool in characterizing and quantifying texture in an image. The purpose of this study was to validate wavelets as a tool in computing trabecular bone thickness directly ...

journal_title：Magnetic resonance imaging

authors： Krug R,Carballido-Gamio J,Burghardt AJ,Haase S,Sedat JW,Moss WC,Majumdar S

更新日期：2007-04-01 00:00:00

abstract：:Quantitative MRI of neuromelanin (NM) containing structures (referred to as NM-MRI) in the brainstem, namely the locus coeruleus (LC) and substantia nigra (SN), may assist with the early detection of Parkinson's disease (PD) and Alzheimer's disease (AD) as well as differential diagnosis in the early disease stages. In...

journal_title：Magnetic resonance imaging

authors： Chen X,Huddleston DE,Langley J,Ahn S,Barnum CJ,Factor SA,Levey AI,Hu X

更新日期：2014-12-01 00:00:00

abstract：:The chain dynamics of short-chain perfluoropolyether melts confined in Vycor nanoporous media has been characterized by field cycling nuclear magnetic resonance relaxometry and the dipolar correlation effect. The slowdown of motions under confinement, leading to larger residual dipolar couplings, has been probed by lo...

journal_title：Magnetic resonance imaging

authors： Kausik R,Fatkullin N,Hüsing N,Kimmich R

更新日期：2007-05-01 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：:Gadolinium-based magnetic resonance (MR) contrast agents (GBCM) causes a devastating systemic fibrosing illness, nephrogenic systemic fibrosis (NSF), in patients with reduced kidney function. GBCM targets iron-recycling CD163- and ferroportin-expressing macrophages to release labile iron that mediates gadolinium toxic...

journal_title：Magnetic resonance imaging

authors： Swaminathan S

更新日期：2016-12-01 00:00:00

abstract：:The effect of slice orientation on reproducibility and sensitivity of 3T fMRI activation using a motor task has been investigated in six normal volunteers. Four slice orientations were used; axial, oblique axial, coronal and sagittal. We applied analysis of variance (ANOVA) to suprathreshold voxel statistics to quanti...

journal_title：Magnetic resonance imaging

authors： Gustard S,Fadili J,Williams EJ,Hall LD,Carpenter TA,Brett M,Bullmore ET

更新日期：2001-12-01 00:00:00

abstract：:Flattened representations are a useful approach to represent the convoluted complex surface of the neocortex of primates and other large-brained mammals. In this study, we compared the flattened representation of neocortical areas obtained from the recently published MRI and histology atlas of the rhesus monkey brain ...

journal_title：Magnetic resonance imaging

authors： Sultan F,Hamodeh S,Murayama Y,Saleem KS,Logothetis N

更新日期：2010-10-01 00:00:00

abstract：:Zero-mean noise introduced into quadrature detected MRI signals is generally rectified by the reconstruction algorithm to give a nonzero background intensity in the displayed image. In low signal-to-noise ratio (SNR) images, this background will inflate region of interest (ROI) signal measurements, leading to improper...

journal_title：Magnetic resonance imaging

authors： Miller AJ,Joseph PM

更新日期：1993-01-01 00:00:00

abstract：:The medical specialty radiology has experienced a number of extremely important and influential technical developments in the past that have affected how medical imaging is deployed. Artificial intelligence (AI) is potentially another such development that will introduce fundamental changes into the practice of radiol...

journal_title：Magnetic resonance imaging

authors： Gore JC

更新日期：2020-05-01 00:00:00

abstract：:A case report of trismus after a dental procedure is evaluated by MR imaging. The medial and lateral pterygoid muscles showed inflammatory changes. Etiologies of trismus are reviewed. ...

journal_title：Magnetic resonance imaging

authors： Ciacchella AP,Higgins WL

更新日期：1990-01-01 00:00:00

abstract：INTRODUCTION:Glioma is the most common type of the primary CNS tumor. Radiotherapy is an important treatment measure after surgery. However, its highly invasive character is the main reason of postoperative recurrence. The aim of the study was to probe the correlation between the invasion ability and the metabolite cha...

journal_title：Magnetic resonance imaging

authors： Xu YJ,Cui Y,Li HX,Shi WQ,Li FY,Wang JZ,Zeng QS

更新日期：2016-10-01 00:00:00

abstract：:Proton MR measurements were performed in lyophilized urine samples collected from 5 normals (N) and 5 idiopathic hypercalciuric recurrent stone formers (SF). T1 and T2 relaxation times were measured with a Bruker PC Multispec at 20 MHz and 37 degrees C in the lyophilized samples and in samples gradually rehydrated. Si...

journal_title：Magnetic resonance imaging

authors： Azoury R,Abrashkin S,Weininger J,Iaina A

更新日期：1988-01-01 00:00:00

abstract：:The sensitivity of multiple diffusion MRI (dMRI) parameters to longitudinal changes in white matter microstructure was investigated for the 3xTg-AD transgenic mouse model of Alzheimer's disease, which manifests both amyloid beta plaques and neurofibrillary tangles. By employing a specific dMRI method known as diffusio...

journal_title：Magnetic resonance imaging

authors： Nie X,Falangola MF,Ward R,McKinnon ET,Helpern JA,Nietert PJ,Jensen JH

更新日期：2019-04-01 00:00:00

abstract：:The optics of the ocular lens are determined by its geometry (shape and volume) and its inherent gradient of refractive index (water to protein ratio), which are in turn maintained by unique cellular physiology known as the lens internal microcirculation system. Previously, magnetic resonance imaging (MRI) has been us...

journal_title：Magnetic resonance imaging

authors： Muir ER,Pan X,Donaldson PJ,Vaghefi E,Jiang Z,Sellitto C,White TW

更新日期：2020-07-01 00:00:00

abstract：:Dynamic contrast-enhanced magnetic resonance imaging (MRI) is widely used for measuring perfusion and blood volume, especially cerebral blood volume (CBV). In case of blood-brain barrier (BBB) disruption, the conventional techniques only partially determine the pharmacokinetic parameters of contrast medium (CM) exchan...

journal_title：Magnetic resonance imaging

authors： Lüdemann L,Hamm B,Zimmer C

更新日期：2000-12-01 00:00:00

abstract：:We assessed the magnetic resonance (MR) imaging characteristics of two categories of epileptogenic substrates, neoplasms, and vascular malformations, to determine MR sensitivity and typical imaging features. A blinded retrospective analysis was performed on MR scans from 41 patients who had a neoplasm or vascular malf...

journal_title：Magnetic resonance imaging

authors： Bronen RA,Fulbright RK,Spencer DD,Spencer SS,Kim JH,Lange RC

更新日期：1995-01-01 00:00:00

abstract：:In this study, magnetic resonance imaging (MRI) was used to dynamically visualize the diffusion process of CO2 in porous media saturated with liquid hydrocarbon. Based on the assumption of semi-infinite media, effective CO2 diffusivity was obtained directly by the nonlinear fitting of one MR profile during the diffusi...

journal_title：Magnetic resonance imaging

authors： Zhao Y,Chen J,Yang M,Liu Y,Song Y

更新日期：2016-05-01 00:00:00

abstract：:Although there is ample evidence in the literature for structural, functional and physiological asymmetries in the two hemispheres of human brain, direct evidence of a similar asymmetry in the in vivo distribution of brain metabolites has been lacking. In this study, the existence of chemical asymmetries in six differ...

journal_title：Magnetic resonance imaging

authors： Jayasundar R,Raghunathan P

更新日期：1997-01-01 00:00:00

abstract：:The magnetic resonance imaging (MRI) features of two cases of malignant lymphoproliferative disease involving skeletal muscle are presented. In both cases involved muscles were quantitatively and subjectively hypointense to fat on T1-weighted spin echo images, hypointense or isointense on T2-weighted spin echo images,...

journal_title：Magnetic resonance imaging

authors： Metzler JP,Fleckenstein JL,Vuitch F,Frenkel EP

更新日期：1992-01-01 00:00:00

abstract：:A phase encoding method for imaging of chemical shift or magnetic field distributions is described. The method utilizes the spin-echo principle and the time period between signal collection and excitation is constant but the time period between excitation and the 180 degrees pulse is varied by constant steps. The meth...

journal_title：Magnetic resonance imaging

authors： Sepponen RE

更新日期：1985-01-01 00:00:00

abstract：:The fast Fourier flow technique offers a convenient way for extremely exact flow measurements. In combination with ECG gating, arterial flow can be studied. The total acquisition time for a single measurement is about 10 s, an ECG-gated cine sequence can be acquired in about 4 min. Fast Fourier flow can, therefore, be...

journal_title：Magnetic resonance imaging

authors： Hennig J,Mueri M,Brunner P,Friedburg H

更新日期：1988-07-01 00:00:00

abstract：:In the longitudinal study of multiple sclerosis (MS) lesions, varying position of the patient inside the MRI scanner is one of the major sources of assessment errors. We propose to use analytical indices that are invariant to spatial orientation to describe the lesions, rather than focus on patient repositioning or im...

journal_title：Magnetic resonance imaging

authors： Goldberg-Zimring D,Achiron A,Warfield SK,Guttmann CR,Azhari H

更新日期：2004-07-01 00:00:00

abstract：:Pellets of HeLa from suspension cultured cells in isotonic medium (300 mosmolar) were introduced into a Bruker CXP100 NMR spectrophotometer at 80 mHz within 5 min of the start of centrifugation. T1 and T2 times were measured within a total elapsed time of 20-25 min at 80 mHz and 37 degrees C, and averaged 1430 msec an...

journal_title：Magnetic resonance imaging

authors： Wheatley DN,Rimmington JE,Foster MA

更新日期：1990-01-01 00:00:00

abstract：:The purpose of the study was to determine whether diffusion-weighted magnetic resonance imaging (DWI) could identify focal lesions that develop in ischemia-sensitive cerebral tissues during reperfusion following global brain ischemia. Localized 1H-Magnetic Resonance Spectroscopy (1H-MRS) measurements were also obtaine...

journal_title：Magnetic resonance imaging

authors： Bizzi A,Righini A,Turner R,Le Bihan D,Bockhorst KH,Alger JR

更新日期：1996-01-01 00:00:00

abstract：:The analysis of functional magnetic resonance imaging (fMRI) data involves multiple stages of data pre-processing before the activation can be statistically detected. Spatial smoothing is a very common pre-processing step in the analysis of functional brain imaging data. This study presents a broad perspective on the ...

journal_title：Magnetic resonance imaging

authors： Mikl M,Marecek R,Hlustík P,Pavlicová M,Drastich A,Chlebus P,Brázdil M,Krupa P

更新日期：2008-05-01 00:00:00

abstract：:T1 and T2 relaxation times are fundamental parameters for signal contrast behaviour in MRI. A number of ex vivo relaxometry studies have dealt with the magnetic field dispersion of T1. By means of multicenter study within the frame of the COMAC BME Concerted Action on Tissue Characterization by MRI and MRS, the in viv...

journal_title：Magnetic resonance imaging

authors： Henriksen O,de Certaines JD,Spisni A,Cortsen M,Muller RN,Ring PB

更新日期：1993-01-01 00:00:00

abstract：:With the aim of developing a fast algorithm for high-quality MRI reconstruction from undersampled k-space data, we propose a novel deep neural Network, which is inspired by Iterative Shrinkage Thresholding Algorithm with Data consistency (NISTAD). NISTAD consists of three consecutive blocks: an encoding block, which m...

journal_title：Magnetic resonance imaging

authors： Qiu W,Li D,Jin X,Liu F,Sun B

更新日期：2020-07-01 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：PURPOSE:To provide a comprehensive understanding of multi-shot EPI diffusion imaging methods by comparing Readout segmented EPI (RS-EPI) and interleaved EPI (iEPI). MATERIALS AND METHODS:RS-EPI and iEPI were compared on the same 3T scanner. A 2D navigator was used for both RS-EPI and iEPI for phase correction. Signal ...

journal_title：Magnetic resonance imaging

authors： Wang Y,Ma X,Zhang Z,Dai E,Jeong HK,Xie B,Yuan C,Guo H

更新日期：2018-04-01 00:00:00