SWI在急性缺血性卒中伴脑内微出血的临床应用

The Clinical Application of SWI in Cerebral Microbleeds Correlated with Acute Ischemic Stroke

目的利用磁敏感加权成像(SWI)探讨急性脑卒中伴发的微出血的特征。资料与方法 100例急性缺血性脑卒中患者行常规轴位T1WI、T2WI、扩散加权成像(DWI)及SWI检查。分析血管病高危因素、T2WI图像脑白质高信号的影像表现与微出血的关系及微出血发生部位。结果共检出17例(17%)微出血;微出血常见发生部位依次为基底节区、皮层下和皮层、丘脑、脑干,小脑半球少见。微出血发生与年龄、高血压、陈旧性脑卒中、T2WI白质高信号密切相关。结论微出血的出现与高血压、小血管疾病关系密切,成为晚期脑微血管病标志,利用SWI探讨急性缺血性脑卒中伴发的微出血特征,能为临床脑卒中治疗提供参考依据。

Objective To assess the imaging features of Cerebral microbleeds（CMBs）in ischemic stroke patients using susceptibility weighted imaging（SWI）.Materials and Methods A total of one hundred ischemic strock patients were enrolled in this study.The imaging protocol involved T2-weighted imaging,T1-weighted imaging,diffusion-weighted imaging（DWI）,SWI.The correlation between vascular risk factors and radiological findings including CMBs location and white matter hyperintensity was analysed.Results CMBs were found on SWI in 17 patients（17%）.The most common location of CMBs was the basal ganglia,followed by the corticosubcortical region,the thalami,the brainstem,and the cerebellum was rare.The severity of CMBs was closely correlated with the severity of age,pervious stroke,hypertension and cerebral white matter hyperintensity.Conclusion CMBs are closely related with hypertension and cerebral microangiopathy,it may be a marker of advanced stage cerebral microangiopathy,guide ischemic stroke treatment.