慢性扩展性脑内血肿的影像学诊断

摘要

Objective To investigate the CT and MRI characteristics of chronic expanding intracerehral hematoma ( CEICH ) . Methods The CT and MRI findings of 5 patients with CEICH confirmed by surgery were retrospectively analyzed. Results The CT scan showed quasi - circular or ellipse lesions with clear borders in all the 5 cases, low density or density of lesions in the center with low density well - defined edematous hoop in 2 cases, and mass effect for all the 5 cases. The enhanced CT scan showed that the hoop was slightly enhanced in 2 cases, and intermediately enhanced in 3 cases. MRI scan showed that all the 5 cases got cystic lesions of heterogeneous high signal on T1WI and T2WI, with " hoop sign" of the cystic wall of low signal on T2WI, and SWI showed a lower signal of the " hoop" . And the enhanced scan revealed a intensified hoop. Conclusion The CEICH is lack of characteristic in CT imaging, however, it has a special " hoop sign" in MRI. So MRI is an ideal examination for CEICH.%目的 探讨慢性扩展性脑内血肿(CEICH)的CT、MRI特征.方法 回顾性分析5 例手术证实的CEICH患者的CT、MRI表现.结果 CT平扫5例病变均为类圆形或椭圆形,边界清楚,2例周边显示低密度水肿带环绕,中央呈等密度或低密度影,5例均有占位效应.增强后,2例轻度"环形"强化,3例中度"环形"强化.5例均表现为T1WI、T2WI均匀高信号囊状病变,T2WI囊壁呈低信号"铁环"征,SWI为更低信号"铁环",增强扫描显示环形强化.结论 CEICH的CT表现缺乏特征性,其MRI表现具有特征性的"铁环"征,MRI是CEICH较理想的影像学检查方法.