环形强化脑肿块的扩散加权磁共振成像：水扩散明显降低对脑脓肿具有特异性吗？
Diffusion-weighted MR imaging of rim-enhancing brain masses: is markedly decreased water diffusion specific for brain abscess?
作者信息
Tung G A, Evangelista P, Rogg J M, Duncan J A
机构信息
Department of Diagnostic Imaging, Brown University School of Medicine, Rhode Island Hospital, 593 Eddy St., Providence, RI 02903, USA.
出版信息
AJR Am J Roentgenol. 2001 Sep;177(3):709-12. doi: 10.2214/ajr.177.3.1770709.
OBJECTIVE
This retrospective study investigated the specificity of restricted water diffusion for the diagnosis of brain abscess. Two of five rim-enhancing brain masses with restricted water diffusion (apparent diffusion coefficient of 0.79 [10(-3) mm(2)/sec] or less) were brain abscesses, but diagnoses in the other cases were metastatic squamous cell carcinoma (two cases) and radiation necrosis.
CONCLUSION
Although an important diagnostic sign, restricted water diffusion is not specific for brain abscess.
目的
本回顾性研究调查了水扩散受限对脑脓肿诊断的特异性。五个边缘强化且伴有水扩散受限（表观扩散系数为0.79[10⁻³mm²/秒]或更低）的脑肿块中，有两个是脑脓肿，但其他病例的诊断分别为转移性鳞状细胞癌（两例）和放射性坏死。
结论
尽管水扩散受限是一个重要的诊断体征，但它对脑脓肿并不具有特异性。
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