脑血管疾病是危害人类健康的常见病之 ,脑血管病的早期诊断对治疗乃至患者今后生存质量尤其重要。CT的问世使脑出血与脑梗塞的鉴别诊断迎刃而解,MRI的出现又填补了CT难以显示脑干、小脑、脊髓各种血管病变的缺憾。老年性痴呆一直依赖临床与病理诊断,采用MRI检查不仪能显 Cerebrovascular disease is a common disease that endangers human health. The early diagnosis of cerebrovascular disease is especially important for the quality of life of the patients even after treatment. The advent of CT makes the differential diagnosis between cerebral hemorrhage and cerebral infarction easy to solve, and the appearance of MRI has filled the defect that CT can hardly display various vascular diseases of brain stem, cerebellum and spinal cord. Alzheimer’s dementia has always been dependent on clinical and pathological diagnosis, using MRI examination can not be significant