可逆性后部脑病综合征的CT和MRI诊断  

CT and MRI Diagnosis of Reversible Posterior Encephalopathy Syndrome

作　　者：罗健君[1] 李晓兵[1] 许建铭[1] 刘仁坚[1] 秦明明[1] 韩文广[1] 

机构地区：[1]南京医科大学附属苏州医院苏州市立医院本部放射科,江苏苏州215002

出　　处：《实用放射学杂志》2009年第12期1716-1719,共4页Journal of Practical Radiology

摘　　要：目的探讨可逆性后部脑病综合征（RPES）的CT和MRI特点。方法回顾性分析5例经临床随访证实的RPES患者的临床和MRI资料。结果头颅MRI检查显示病变累及双侧枕叶4例，双侧顶叶及双侧基底节对称性受累各2例，2例单侧顶叶受累，1例伴胼胝体压部受累，1例左侧小脑受累。MRI信号呈T1WI低信号，T2WI高信号，FLAIR序列病灶信号明显增高，增强扫描病灶无明显强化。5例弥散加权成像随着b值的加大（0，500，1000s／mm^2），病灶高信号逐渐减低，ADC信号略增高。CT扫描病灶呈低密度影。结论MRI表现结合临床资料，可正确诊断可逆性后部脑病综合征。Objective To investigate CT and MRI characteristics of reversible posterior encephalopathy syndrome （RPES）. Methods The clinical and imaging data of 5 patients with RPES confirmed by clinical follow-up were analyzed retrospectively. Results Among the 5 cases , brain MRI showed that bilateral occipital lobe involved symmetrically in 4 cases , parietal lobe involved symmet-rically in 2 cases, bilateral basal nucleus involved symmetrically in 2 cases, one sided parietal lobe involved in 2 cases, corpus callosum involved in 1 case and cerebellum involved in 1 case. The lesions were low signal on T1WI,high signal on T2WI and FLAIR, no en- hancement was showed after contrast-enhanced scan. The signal intensity of the lesions was decreased gradually with the b value increased（0,500,1000） at DWI and apparent diffusion coefficient（ADC） slightly increased. The lesions revealed low density on CT images. Conclusion MRI in combination with clinical informations can exactly diagnose RPES.

关 键 词：脑 磁共振成像 体层摄影术 X线计算机 可逆性后部脑病综合征 

分 类 号：R742[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]