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目的探讨ＣＴＡ成像诊断颅内动脉瘤引起急性蛛网膜下腔出血的作用。方法应用螺旋ＣＴ平扫诊断急性蛛网膜下腔出血３０例，应用计算机ＳＳＤ和ＭＩＰ软件进行脑血管三维成像（３ＤＣＴＡ）。结果ＣＴＡ诊断颅内动脉瘤１４例，其中前交通动脉瘤３例，右大脑中动脉（Ｍ１段）动脉瘤２例，右后交通动脉瘤２例，左后交通动脉瘤４例，基底动脉瘤２例，左侧椎动脉瘤颅内段动脉瘤１例。ＣＴＡ清楚显示颅内脑基底动脉瘤的部位、形态、大小、起源以及与周围脑血管和颅骨的解剖关系。结论ＣＴＡ对颅内动脉瘤引起的蛛网膜下腔出血病因诊断是一种快捷、安全、简单的检查方法，对外科手术方案的设计有指导作用
Objective To investigate the role of CTA in the diagnosis of acute subarachnoid hemorrhage caused by intracranial aneurysm. Methods Thirty patients with acute subarachnoid hemorrhage were diagnosed by spiral CT plain scan, and 3D computer-aided tomography (3D-CTA) was performed using computerized SSD and MIP software. Results CTA was diagnosed by intracranial aneurysm in 14 cases, including 3 cases of anterior communicating artery aneurysm, 2 cases of right middle cerebral artery (M1 section) aneurysm, 2 cases of right posterior communicating artery aneurysm, 4 cases of left posterior communicating artery aneurysm, 2 cases, left anterior cruciate intracranial aneurysm in 1 case. CTA clearly shows the location, shape, size, origin, and anatomy of the intracranial cerebral basilar artery aneurysm in relation to the surrounding cerebral vessels and skull. Conclusion The diagnosis of intracranial aneurysm-induced subarachnoid hemorrhage by CTA is a quick, safe and simple method for the diagnosis of surgical procedures.