脑血管缺血性病变患者Willis环发育及变异情况

目的探讨脑血管缺血性病变患者大脑动脉环（Willis环）的发育及变异情况。方法分析100例脑血管病变患者3D TOP MRA图像，统计各个动脉的变异情况及发生率，并与100例健康体检人群的3D TOP MRA图像对照。结果两组Wills环存在很大的变异。病变组与对照组Wllis环发育完整率分别为13%、25%，差异有统计学意义（P<0.05）。结论Willis环发育不完整与脑血管疾病的发生密切相关。

Study on development of Willis ring in patients with ischemic cerebrovascular disease

Objective To investigate the development and variation of cerebral artery ring (Willis ring) in patients with cerebral vascular disease. Methods MRA 3D TOP images of 100 patients with cerebral vascular disease were analyzed， and the variation and incidence of each artery were analyzed and compared with the MRA 3D TOP images of 100 healthy people. Results There was a large variation in Willis ring between two groups. Willis ring development complete rates of hospitalized patients and healthy check up people were 13% and 25%， respectively. There was statistically significant difference between two groups (P<0.05). Conclusion The incompleteness of Willis ring is closely related to the occurrence of cerebrovascular disease.