大脑纵裂硬膜下血肿的影像学诊断

Imaging diagnosis of longitudinal fissure subdural hematoma

目的探讨大脑纵裂硬膜下血肿的CT及MR1表现和诊断价值。方法回顾性分析我院收治的11例外伤性大脑纵裂硬膜下血肿患者的CT及MRI表现。结果11例大脑纵裂硬膜下血肿位于前纵裂5例,后纵裂4例,全纵裂2例,血肿量最大的28ml,最小的6ml。CT表现为大脑中线部位的带状高密度,一侧贴附于大脑镰,另一侧凸向大脑半球。2例行MRI检查,T_1WI呈现为中线部位的带状高信号,T_2WI血肿呈等信号。结论CT及MRI检查能对大脑纵裂硬膜下血肿做出正确诊断。

Objective To analyze the imaging characteristics of longitudinal fissure subdural hematoma（LFSH）. Methods CT and MRI images of 11 patients with LFSH were retrospectively analyzed. Results On CT scan, LFSH was shown as a girdle-shaped high density parafalcic area, which located in anterior longitudinal fissure in 5 cases, posterior longitudinal fissure in 4 cases, full longitudinal fissure in 2 cases. MRI of 2 cases showed hypointensity on T1-weighted images and isointensity on T2-weighted images. Conclusion CT and MRI images are the most helpful for the correct diagnosis of LFSH.