Brain lesions: when should fluid-attenuated inversion-recovery sequences be used in MR evaluation?
Brain lesions: when should fluid-attenuated inversion-recovery sequences be used in MR evaluation?
复制标题
脑损伤：何时应在 MR 评估中使用液体衰减反转恢复序列？
DOI：
10.1148/radiology.212.3.r99se07793
复制
发表时间：
1999
期刊：
影响因子：
19.7
通讯作者：
Mutsumasa Takahashi
中科院分区：
文献类型：
--
作者：
T. Okuda;Y. Korogi;Y. Shigematsu;T. Sugahara;T. Hirai;I. Ikushima;L. Liang;Mutsumasa Takahashi
目的
比较液体衰减反转恢复（FLAIR）序列和中等加权序列在磁共振（MR）成像中检测到的脑部病变的对比度。
材料和方法
在这项前瞻性研究中，47例怀疑有脑病变的患者接受了FLAIR、中等加权和T2加权序列的MR成像。对病变的显著性、检测、整体图像伪影和其他临床信息进行定性评估。计算病灶与正常脑或脑脊液（CSF）之间的对比度和对比噪声比（CNR）。
结果
FLAIR图像与中等加权图像在整体病变的显著性和检测方面相同，但更常与图像伪影相关。FLAIR图像的病灶与背景对比度明显高于中等加权图像。FLAIR图像未能显示多发性硬化（MS）斑块位于基底节和脑干。
结论
尽管FLAIR图像在某些情况下提供了额外的信息，但与中等加权图像相比，它们并没有明显的优势。当评估MS病例时，中等加权图像优于FLAIR图像。除MS病例外，MR成像时应在T2加权序列上增加FLAIR或中等加权序列。
PURPOSE
To compare qualitatively and quantitatively the contrast of brain lesions detected with fluid-attenuated inversion-recovery (FLAIR) and intermediate-weighted sequences at magnetic resonance (MR) imaging.
MATERIALS AND METHODS
In this prospective study, 47 patients suspected of having a brain lesion underwent MR imaging with FLAIR, intermediate-weighted, and T2-weighted sequences. Qualitative assessment was performed of lesion conspicuity, detection, overall image artifact, and additional clinical information. Contrast and contrast-to-noise ratio (CNR) were calculated between lesions and the normal brain or cerebrospinal fluid (CSF).
RESULTS
FLAIR images were equal to intermediate-weighted images for overall lesion conspicuity and detection but were associated more often with image artifacts. Lesion-to-background contrast was significantly higher on FLAIR than on intermediate-weighted images. FLAIR images failed to demonstrate multiple sclerosis (MS) plaques located in the basal ganglia and brain stem.
CONCLUSION
Although FLAIR images provided additional information in some cases, they did not have distinct advantages over intermediate-weighted images. When cases of MS are evaluated, intermediate-weighted images are preferable to FLAIR images. Except in cases of MS, either FLAIR or intermediate-weighted sequences should be added to T2-weighted sequences at MR imaging.
影响因子：
19.7
作者：
RYDBERG, JN;HAMMOND, CA;RIEDERER, SJ
通讯作者：
RIEDERER, SJ
液体衰减反转恢复 MR 在检测脊髓多发性硬化症中的敏感性较低。
DOI：
--
发表时间：
1997
期刊：
AJNR. American journal of neuroradiology
影响因子：
--
作者：
Keiper,MD;Grossman,RI;Brunson,JC;Schnall,MD
通讯作者：
Schnall,MD