Magnetic Resonance in Medicine
SCOPUS (1984-2023)SCIE-ISI
0740-3194
1522-2594
Mỹ
Cơ quản chủ quản: WILEY , John Wiley & Sons Inc.
Lĩnh vực:
Radiology, Nuclear Medicine and Imaging
Các bài báo tiêu biểu
Functional connectivity in the motor cortex of resting human brain using echo‐planar mriAbstract An MRI time course of 512 echo‐planar images (EPI) in resting human brain obtained every 250 ms reveals fluctuations in signal intensity in each pixel that have a physiologic origin. Regions of the sensorimotor cortex that were activated secondary to hand movement were identified using functional MRI methodology (FMRI). Time courses of low frequency (<0.... ... hiện toàn bộ
Tập 34 Số 4 - Trang 537-541 - 1995
Generalized autocalibrating partially parallel acquisitions (GRAPPA)Abstract In this study, a novel partially parallel acquisition (PPA) method is presented which can be used to accelerate image acquisition using an RF coil array for spatial encoding. This technique, GeneRalized Autocalibrating Partially Parallel Acquisitions (GRAPPA) is an extension of both the PILS and VD‐AUTO‐SMASH reconstruction techniques. As in those previous ... ... hiện toàn bộ
Tập 47 Số 6 - Trang 1202-1210 - 2002
Estimation of metabolite concentrations from localized in vivo proton NMR spectraAbstract The LCModel method analyzes an in vivo spectrum as a Linear Combination of Model spectra of metabolite solutions in vitro. By using complete model spectra, rather than just individual resonances, maximum information and uniqueness are incorporated into the analysis. A constrain... ... hiện toàn bộ
Tập 30 Số 6 - Trang 672-679 - 1993
Improved Assessment of Significant Activation in Functional Magnetic Resonance Imaging (fMRI): Use of a Cluster‐Size ThresholdAbstract The typical functional magnetic resonance (fMRI) study presents a formidable problem of multiple statistical comparisons (i.e, > 10,000 in a 128 x 128 image). To protect against false positives, investigators have typically relied on decreasing the per pixel false positive probability. This approach incurs an inevitable loss of power to detect statistica... ... hiện toàn bộ
Tập 33 Số 5 - Trang 636-647 - 1995
Characterization and propagation of uncertainty in diffusion‐weighted MR imagingAbstract A fully probabilistic framework is presented for estimating local probability density functions on parameters of interest in a model of diffusion. This technique is applied to the estimation of parameters in the diffusion tensor model, and also to a simple partial volume model of diffusion. In both cases the parameters of interest include parameters definin... ... hiện toàn bộ
Tập 50 Số 5 - Trang 1077-1088 - 2003
The rician distribution of noisy mri dataAbstract The image intensity in magnetic resonance magnitude images in the presence of noise is shown to be governed by a Rician distribution. Low signal intensities (SNR < 2) are therefore biased due to the noise. it is shown how the underlying noise can be estimated from the images and a simple correction scheme is provided to reduce the bias. the noise charact... ... hiện toàn bộ
Tập 34 Số 6 - Trang 910-914 - 1995
Oxygenation‐sensitive contrast in magnetic resonance image of rodent brain at high magnetic fieldsAbstract At high magnetic fields (7 and 8.4 T), water proton magnetic resonance images of brains of live mice and rats under pentobarbital anesthetization have been measured by a gradient echo pulse sequence with a spatial resolution of 65 × 65‐μm pixel size and 700‐μm slice thickness. The contrast in these images depicts anatomical details of the brain by numerous ... ... hiện toàn bộ
Tập 14 Số 1 - Trang 68-78 - 1990
Time course EPI of human brain function during task activationAbstract Using gradient‐echo echo‐planar MRI, a local signal increase of 4.3 ± 0.3% is observed in the human brain during task activation, suggesting a local decrease in blood deoxyhemoglobin concentration and an increase in blood oxygenation. Images highlighting areas of signal enhancement temporally correlated to the task are created. © 1992 Academic Press, Inc.
Tập 25 Số 2 - Trang 390-397 - 1992
Recommended implementation of arterial spin‐labeled perfusion MRI for clinical applications: A consensus of the ISMRM perfusion study group and the European consortium for ASL in dementiaThis review provides a summary statement of recommended implementations of arterial spin labeling (ASL) for clinical applications. It is a consensus of the ISMRM Perfusion Study Group and the European ASL in Dementia consortium, both of whom met to reach this consensus in October 2012 in Amsterdam. Although ASL continues to undergo rapid technical development, we believe that current ASL m... ... hiện toàn bộ
Tập 73 Số 1 - Trang 102-116 - 2015
Perfusion imagingAbstract Measurement of tissue perfusion is important for the functional assessment of organs in vivo. Here we report the use of 1 H NMR imaging to generate perfusion maps in the rat brain at 4.7 T. Blood water flowing to the brain is saturated in the neck region with a sliceselective saturation imaging sequence, creati... ... hiện toàn bộ
Tập 23 Số 1 - Trang 37-45 - 1992