目的 探讨磁共振对脑血管病的诊断价值。方法 回顾性分析我院2000例门诊患者的颅脑MRA及MRI平扫资料，分析 1.5T磁共振检查出的脑血管病的类型及发病率。结果 2000例患者中，共发现血管病变106例，发病率5.3%；其中动 脉狭窄53例78根血管，动脉瘤23例27个瘤体，烟雾病4例，AVM7例，静脉畸形4例，海绵状血管瘤14例,毛细血管扩 张1例。MRA对诊断动脉狭窄的部位及程度、动脉瘤的形态及部位、烟雾病受累血管的支数等价值极高；AVM的供血 动脉、引流静脉及血管巢的显示，静脉畸形的血管组成及引流静脉的数目和方向，以MRA及MRI平扫的SWAN序列为 佳；MRA对海绵状血管瘤的诊断价值不大，MRI平扫的T1WI、T2WI、SWAN序列价值大。结论 MRA结合MRI检查能清晰 显示脑血管病变的病灶部位、大小、形态、数目、类型，对早期诊断及干预治疗具有重要的临床价值。

Objective To discuss the Diagnostic Value of MRI in cerebrovascular disease .Methods The brain MRA and MRI of 2000 outpatients in our hospital were reviewed retrospectively, the types and Incidence of cerebrovascular disease detected by 1.5T MR were analyzed. Results In the 2000 cases,we found 106 cases of vascular disease the rate of incidence 5.3%, which includes 53 cases 78 vessels with artery stenosis, 23 cases 27 lesions with aneurysm , 4 cases with moyamoya disease,7 cases with AVM, 4 cases with venous malformation, 14 cases with cavernous hemangioma, and 1 case with capillary expansion. MRA examination has high value in evaluating the region and degree of arterial stenosis, the shape and location of aneurysm,and the number of affe cted vessels of moyamoya disease.MRA and the SWI sequence is preferred in showing the supply artery, draining vein and vascular nest of AVM,and displaying the vascular structure,the number and direction of draining vein of venous malformations.T1WI,T2WI,SWAN sequence has higher value while MRA is of little value in diagnosis of cavernous hemangioma. Conclusion MRA combined with MRI can clearly show the location,size,shape,number and type of cerebrovascular disease,and has important clinical value in early diagnosis and intervention.