目的　探讨 CT血管造影 (CTA)在脑动脉瘤诊断治疗中的价值。方法　对 2 1例可疑动脉瘤患者进行 CTA检查 ,8例同时行数字减影血管造影 (DSA)检查 ,与 CTA检查结果比较 ,并与术中所见进行对照。结果　2 1例患者共检出 2 3个动脉瘤并经手术证实 ,其中假阳性动脉瘤 1个。 CTA可以显示动脉瘤的三维解剖结构 ,为手术提供便利。结论　 CTA可以作为蛛网膜下腔出血及可疑动脉瘤患者的初选检查方法。但不能连续观测脑循环过程及进行血管内操作。 Objective To investigate the value of CT angiography (CTA) in the diagnosis and treatment of cerebral aneurysm. Methods Twenty-one patients with suspected aneurysm were examined by CTA and 8 patients underwent digital subtraction angiography (DSA) at the same time. The results were compared with those of CTA and compared with the findings of intraoperative findings. RESULTS Twenty-three aneurysms were detected in 21 patients and confirmed by surgery, including 1 false-positive aneurysm. CTA can display the three-dimensional aneurysm anatomy, to facilitate surgery. Conclusion CTA can be used as a primary screening method for patients with subarachnoid hemorrhage and suspected aneurysm. But can not continuously observe the process of cerebral circulation and intravascular operations.