脑弥漫性轴索损伤的MRI诊断(附25例分析)  

MRI diagnosis of diffuse axonal injury: analysis of 25 cases

作　　者：张明[1] 高林蓉[1] 李星[1] 

机构地区：[1]太原市中心医院磁共振室,太原市030009

出　　处：《实用医学影像杂志》2001年第1期11-13,共3页Journal of Practical Medical Imaging

摘　　要：目的 分析脑弥漫性轴索损伤的（ＤＡＩ）的ＭＲＩ表现及诊断价值。材料及方法 对２５例临床疑为头部外伤患者作磁共振常规扫描并提出ＤＡＩ的诊断条件。结果２５例中总共发现６３个病灶，分布于大脑额叶，顶叶，颞叶及胼胝体等脑白质区。ＭＲＩ特点为呈斑片状，条索状或结节状稍长Ｔ１或长Ｔ２信号。Ｔ２ＷＩ信号优于Ｔ１ＷＩ与 ＣＴ对比，ＣＴ检出率为２５％。Objective TO analyze MRI appearances of diffuse axonal injury(DAI) and to determine its diagnostic value. Methods Twenty - five patients with clinically suspected DAI underwent routine MRI examinations and then the diagnostic conditions of DAI on MRI were discussed. Results At prospective review of all images, 63 lesions which distributed into the white matter of cerebral frontal, parietal, temporal lobe and corpus callosum were detected in 25 patients. MRI findings of the lesions were plaque = patchy, stripe - form and /or nodular. On T1 weighted image, the lesions were slightly hypointense. On T2 weighted image, the lesions were hyperintense. In the case of MRI for diagnosis of DAI, T2 weighted images were obviously superior to T1 weighted images. Conclusion Routine MR imaging is a Promising method in the evaluation of DAI.

关 键 词：脑弥漫性轴索损伤 MRI诊断 MRI表现及 T2WI信号 MRI特点 诊断价值 诊断条件 常规扫描 外伤患者 大脑额叶 脑白质区 T2信号 T1WI DAI 磁共振 胼胝体 斑片状 结节状 条索状 检出率 CT 

分 类 号：R445.2[医药卫生—影像医学与核医学]