高血压脑病的MRI表现

目的 分析高血压脑病的MRI表现。资料与方法 搜集8例经临床诊断高血压脑病患者，行MR T1WI和T2WI检查，其中4例加行扩散加权成像（DWI），分析血压变化、MRI表现及ADC值变化。结果 发病时平均血压199．63／123．5mmHg（1mmHg=0．133kPa），平均升高25．73％／28．71％。MRI上病变主要呈TI稍低、T2稍高信号，以顶枕叶、小脑半球多见。DWI病变呈等及稍高信号，ADC值较正常平均升高58％。仅1个病灶DWI出现明显高信号，ADC值减低。结论 MRI有助于高血压脑病的诊断及鉴别诊断、预后及疗效观察，DWI是将其与急性脑梗死区分开的最佳影像学检查方法。

MRI Appearance of Hypertensive Encephalopathy

Objective To analyze the MRI appearance of hypertensive encephalopathy.Materials and Methods T_1WI and T_2WI of MRI were performed in 8 patients with hypertensive encephalopathy confirmed clinically, and 4 of them were also performed with diffusion weighted imaging, the changes of blood pressure, MRI appearance and apparent diffusion coefficient (ADC) were analyzed.Results The mean onset blood pressure was 199.63/123.5 mmHg and increased with 25.73%/28.71%. The lesions were demonstrated as slightly hypointensity on T_1WI and slightly hyperintensity on T_2WI. The parietal occipital lobes and cerebellar hemisphere were the more common sites. The lesions were showed as iso and slightly hyperintensity on DWI and ADC value increased with 58%. Only one lesion was showed as remarkably hyperintensity on DWI with decreased ADC value.Conclusion MRI can be helpful for diagnosis and differential diagnosis, prognosis and curative effect of hypertensive encephalopathy, DWI is the best examination technique to distinguish it from acute cerebral infarction.