Abstract：
:The relative value of two different MRI procedures for the assessment of infratentorial extension in multiple sclerosis (MS) was studied. Multislice spin-echo techniques were used overall. Procedure A consisted of parasagittal T1-weighted images (500/30) and axial T2-weighted images (2500/30, 2500/120). Procedure B consisted of parasagittal T2-weighted images (1600/35, 1600/90). In the parasagittal T2-weighted images clear visualization of MS lesions is achieved because signal intensities of CSF and normal nervous tissue are nearly identical. All images were performed with a 0.5 Tesla MR system. Data were obtained in 98 patients with definite (N = 30) or probable MS (N = 68). Areas with abnormal signal intensity in the infratentorial regions (brainstem, cerebellum, and/or cervical spinal cord) were identified in 44% of the patients with procedure A and in 64% with procedure B. The standard application of the combination of both procedures improves the sensitivity of the MR examination for the diagnosis of MS, the delineation of infratentorial lesions and the correlation between clinical and MR data without excessively increasing imaging time.
journal_name
Magn Reson Imagingjournal_title
Magnetic resonance imagingauthors
Van de Vyver FL,Truyen L,Gheuens J,Degryse HR,Peersman GV,Martin JJdoi
10.1016/0730-725x(89)90547-xsubject
Has Abstractpub_date
1989-05-01 00:00:00pages
241-9issue
3eissn
0730-725Xissn
1873-5894pii
0730-725X(89)90547-Xjournal_volume
7pub_type
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journal_title：Magnetic resonance imaging
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更新日期：2018-05-01 00:00:00
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abstract：:An efficient method for obtaining longitudinal relaxation time (T1) maps is based on acquiring two spoiled gradient recalled echo (SPGR) images in steady states with different flip angles, which has also been extended, with additional acquisitions, to obtain a tissue water content (M0) map. Several factors, including ...
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doi：10.1016/0730-725x(90)90009-q
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更新日期：1992-01-01 00:00:00
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doi：10.1016/j.mri.2015.10.025
更新日期：2016-02-01 00:00:00
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doi：10.1016/j.mri.2010.08.010
更新日期：2011-02-01 00:00:00
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journal_title：Magnetic resonance imaging
pub_type： 杂志文章
doi：10.1016/0730-725x(87)90023-3
更新日期：1987-01-01 00:00:00
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journal_title：Magnetic resonance imaging
pub_type： 杂志文章
doi：10.1016/j.mri.2004.01.013
更新日期：2004-05-01 00:00:00
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journal_title：Magnetic resonance imaging
pub_type： 杂志文章
doi：10.1016/s0730-725x(00)00128-4
更新日期：2000-06-01 00:00:00
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journal_title：Magnetic resonance imaging
pub_type： 杂志文章
doi：10.1016/s0730-725x(98)00208-2
更新日期：1999-05-01 00:00:00
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journal_title：Magnetic resonance imaging
pub_type： 杂志文章
doi：10.1016/j.mri.2006.03.009
更新日期：2006-09-01 00:00:00
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journal_title：Magnetic resonance imaging
pub_type： 杂志文章
doi：10.1016/0730-725x(85)90006-2
更新日期：1985-01-01 00:00:00
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journal_title：Magnetic resonance imaging
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doi：10.1016/j.mri.2019.05.011
更新日期：2019-09-01 00:00:00
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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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journal_title：Magnetic resonance imaging
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更新日期：2016-12-01 00:00:00
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journal_title：Magnetic resonance imaging
pub_type： 杂志文章
doi：10.1016/0730-725x(90)90253-x
更新日期：1990-01-01 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：1996-01-01 00:00:00
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journal_title：Magnetic resonance imaging
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更新日期：1992-01-01 00:00:00
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journal_title：Magnetic resonance imaging
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doi：10.1016/j.mri.2010.06.009
更新日期：2010-11-01 00:00:00
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pub_type： 临床试验,杂志文章
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更新日期：2013-11-01 00:00:00
abstract：:The present study examined initial changes in non-traumatic osteonecrosis of the femoral head (ONF) on T1- and T2-weighted MR images, and fat suppression images. The subjects were 57 renal transplant recipients (37 males and 20 females), whose median age at the time of transplantation was 31.5 years old (range, 10 to ...
journal_title：Magnetic resonance imaging
pub_type： 杂志文章
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更新日期：2001-09-01 00:00:00
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更新日期：2013-09-01 00:00:00
abstract：:We propose a novel processing method for reducing shading artifacts in quantitative susceptibility mapping (QSM) for prostate imaging. In the conventional method, calculation errors in the boundary regions between water and fat cause shading artifacts that degrade the image quality for QSM. In the proposed method, wat...
journal_title：Magnetic resonance imaging
pub_type： 杂志文章
doi：10.1016/j.mri.2019.11.006
更新日期：2020-02-01 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...
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pub_type： 杂志文章
doi：10.1016/j.mri.2008.02.003
更新日期：2008-10-01 00:00:00
