目的　分析螺旋CT血管造影 (CTA)在急性脑血管病中的应用价值。方法　对发病2 4小时的大脑中动脉供血区梗死患者 2 1例、临床确诊的蛛网膜下腔出血患者 31例分别做CT平扫和CTA ,观察脑梗死或蛛网膜下腔出血患者颅内血管状况。结果　脑梗死组CT阳性率为 42 9% ,CTA阳性率为 71 4% ;CTA显示了梗死区的血管变化。蛛网膜下腔出血组CTA阳性率为 96 % ,同时清晰地显示动脉瘤与载瘤血管、动脉瘤与周围组织的关系。结论　在脑梗死的超早期诊断及确立蛛网膜下腔出血病因方面CTA不失为一种安全、快捷、可靠的微创检查方法 Objective To analyze the value of spiral CT angiography (CTA) in acute cerebrovascular disease. Methods Twenty-one patients with infarction in the middle cerebral artery supplying blood of 24 hours after onset and 31 cases of clinically diagnosed subarachnoid hemorrhage were performed CT scan and CTA respectively to observe the intracranial blood vessels in patients with cerebral infarction or subarachnoid hemorrhage situation. Results The positive rate of CT was 42.9% and the positive rate of CTA was 71.4% in cerebral infarction group. CTA showed the changes of blood vessels in infarct area. Subarachnoid hemorrhage group CTA positive rate was 96%, at the same time clearly shows the aneurysm and tumor-bearing vessels, aneurysms and the surrounding tissue. Conclusion CTA is a safe, fast and reliable method for minimally invasive diagnosis in the early diagnosis of cerebral infarction and the establishment of the cause of subarachnoid hemorrhage