椎—基底动脉系统缺血性疾病是脑血管疾病中的常见病和多发病。临床见于椎—基底动脉供血不全综合征(暂时性缺血性发作,TIA)、椎—基底动脉梗塞和椎—基底动脉闭塞等。由于椎—基底动脉系统的生理解剖特点,发生缺血性改变时临床表现常繁多复杂,往往不易准确作出定位及定性诊断。随着CT较普遍地应用于临床,已使本 Vertebrobasilar ischemia is a common and frequently-occurring disease in cerebrovascular disease. Clinical found in vertebrobasilar insufficiency syndrome (transient ischemic attack, TIA), vertebrobasilar artery infarction and vertebrobasilar artery occlusion. Due to the physiological anatomical features of the vertebrobasilar artery system, the clinical manifestations of ischemic changes are complicated and often difficult to accurately locate and diagnose. With CT more commonly used in clinical, has made this