Abstract:
:Percentage of lipid content of 22 adrenal cortex lesions and their water proton longitudinal relaxation time were measured in vitro at 60 MHz. Although water relaxation times obtained on benign and malignant samples overlap each other, measurements of the percentage of lipids performed on the same tissues allow us to distinguish the two pathologies. The specific tool of characterization should be possible to obtain through in vivo spectroscopic imaging techniques.
journal_name
Magn Reson Imagingjournal_title
Magnetic resonance imagingauthors
Leroy-Willig A,Roucayrol JC,Luton JP,Courtieu J,Niesenbaum N,Louvel Adoi
10.1016/0730-725x(87)90123-8subject
Has Abstractpub_date
1987-01-01 00:00:00pages
339-44issue
5eissn
0730-725Xissn
1873-5894pii
0730-725X(87)90123-8journal_volume
5pub_type
杂志文章abstract::Neurovascular coupling describes the cascade between neuronal activity and subsequent Blood-Oxygenation-Level-Dependent (BOLD) signal increase. Based on this premise, the correlation of this BOLD signal increase with a particular task, such as finger-tapping, is used to map neuronal activation. This signal increase ma...
journal_title:Magnetic resonance imaging
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更新日期:2018-06-01 00:00:00
abstract:PURPOSE:To develop a method for estimating metabolite concentrations using phased-array coils and sensitivity-encoded (SENSE) magnetic resonance spectroscopic images (MRSI) of the human brain. MATERIALS AND METHODS:The method is based on the phantom replacement technique and uses receive coil sensitivity maps and body...
journal_title:Magnetic resonance imaging
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abstract::The phase difference method of phase contrast MR angiography provides a means of measuring the average velocity in each voxel of an MR scan. When static tissue is present in a voxel containing flow, the measured velocity is not the average velocity of the flow alone, but is lower due to the partial volume effect of th...
journal_title:Magnetic resonance imaging
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更新日期:2019-11-01 00:00:00
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journal_title:Magnetic resonance imaging
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更新日期:2008-02-01 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
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更新日期:2021-02-01 00:00:00
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journal_title:Magnetic resonance imaging
pub_type: 杂志文章
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更新日期:1994-01-01 00:00:00
abstract::The objective of this study was to determine the value of magnetic resonance (MR) imaging in diagnosing local recurrence of Ewing sarcoma. We retrospectively reviewed radiographs, Tc99m-methylene diphosphonate (MDP) skeletal scintigraphy, computed tomography scans, and MR studies of 11 patients who had local recurrenc...
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更新日期:1994-01-01 00:00:00
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更新日期:2006-04-01 00:00:00
abstract::Various analogs of NMR and MRI are now technically possible in optics; specifically, high-resolution laser-pulse shaping and complex pulse sequence generation with well-defined phase shifts has been demonstrated. Here we summarize this technology and discuss the potential for these methods to enhance optical functiona...
journal_title:Magnetic resonance imaging
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更新日期:2003-12-01 00:00:00
abstract:BACKGROUND:The diagnosis and management of mild traumatic brain injury (MTBI) continue to be subjects of debate, with varying opinions regarding the extent to which tissue-based impairments versus the impacts of other stressors cause ongoing disability. Detecting areas of the brain with abnormalities that can explain s...
journal_title:Magnetic resonance imaging
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更新日期:2012-05-01 00:00:00
abstract::A regularization strategy is described for generalized autocalibrating partially parallel acquisition (GRAPPA) that allows successful calibration using a small number of autocalibration signals (ACS). The approach requires certain nonlinear relationships between the GRAPPA coefficients to be satisfied, which increases...
journal_title:Magnetic resonance imaging
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更新日期:2009-01-01 00:00:00
abstract::Within the magnetic resonance imaging (MRI) community the trend is going to higher and higher magnetic fields, ranging from 1.5 T to 7 T, corresponding to Larmor frequencies of 63.8-298 MHz. Since for high-field MRI the magnetization increases with the applied magnetic field, the signal-to-noise-ratio increases as wel...
journal_title:Magnetic resonance imaging
pub_type: 杂志文章
doi:10.1016/j.mri.2012.06.014
更新日期:2013-02-01 00:00:00
abstract::The CNS involvement is frequently found in human immunodeficiency virus (HIV) infection. The purpose of our study was to determine whether proton magnetic resonance spectroscopy (MRS) could detect early brain involvement in neurologically asymptomatic HIV-infected patients with normal MR imagings and to find the corre...
journal_title:Magnetic resonance imaging
pub_type: 临床试验,杂志文章
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更新日期:2000-09-01 00:00:00
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更新日期:2012-06-01 00:00:00
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更新日期:2001-06-01 00:00:00
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doi:10.1016/0730-725x(93)90241-5
更新日期:1993-01-01 00:00:00
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更新日期:2006-12-01 00:00:00
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更新日期:2010-05-01 00:00:00
abstract::Constrained energy minimization (CEM) has proven highly effective for hyperspectral (or multispectral) target detection and classification. It requires a complete knowledge of the desired target signature in images. This work presents "Unsupervised CEM (UCEM)," a novel approach to automatically target detection and cl...
journal_title:Magnetic resonance imaging
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更新日期:2010-06-01 00:00:00
abstract::The dependence of BOLD signal change (BSC) on baseline hematocrit is in the process of being characterized, primarily using conventional Gradient Echo (GE) echo planar imaging (EPI). We describe the first empiric exploration of this relationship using, in addition to GE, Spin Echo (SE) and two Asymmetric Spin Echo EPI...
journal_title:Magnetic resonance imaging
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doi:10.1016/s0730-725x(03)00083-3
更新日期:2003-07-01 00:00:00
abstract::Budd-Chiari syndrome (BCS) is a rare disorder caused by the obstruction of hepatic venous outflow, leading to sinusoidal congestion, ischemic injury to liver cells and portal hypertension. Long-term survival largely depends on whether hepatocellular carcinoma occurs. A recently available liver-specific contrast medium...
journal_title:Magnetic resonance imaging
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更新日期:2011-05-01 00:00:00
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journal_title:Magnetic resonance imaging
pub_type: 杂志文章
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更新日期:1997-01-01 00:00:00
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journal_title:Magnetic resonance imaging
pub_type: 杂志文章
doi:10.1016/j.mri.2005.10.006
更新日期:2006-02-01 00:00:00
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journal_title:Magnetic resonance imaging
pub_type: 杂志文章,评审
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更新日期:1995-01-01 00:00:00
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journal_title:Magnetic resonance imaging
pub_type: 杂志文章
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更新日期:2004-04-01 00:00:00
abstract::We report the MR appearance of undifferentiated (embryonal) sarcoma of the liver (USL) in a 13-year-old female who presented with a 1-year history of intermittent abdominal pain, weight loss, and fatigue. The tumor was a large, solitary, well-defined focal mass lesion with multiple cystic spaces, septations, and subst...
journal_title:Magnetic resonance imaging
pub_type: 杂志文章
doi:10.1016/j.mri.2004.02.003
更新日期:2004-07-01 00:00:00