脑血管疾病 (ＣＶＤ)是严重危害人类健康的常见病和多发病 ,病死率及致残率颇高 ,早期及时诊断和治疗是降低病死率及致残率、改善预后的关键。尽管大部分脑卒中患者通常依据病史、神经系统症状和体征等可获得临床确诊 ,但通过ＣＴ或ＭＲＩ检查进一步确认病变性质和部位非常必要 Cerebrovascular disease (CVD) is a common disease and frequently-occurring disease that seriously endangers human health. The mortality and disability rate are quite high. Early and timely diagnosis and treatment are the keys to reduce mortality and disability and improve prognosis. Although most stroke patients are usually clinically diagnosed based on their medical history, neurological symptoms and signs, it is necessary to further confirm the nature and location of the lesion by CT or MRI