三维CT血管造影诊断颅内动脉瘤的价值

Value of three-dimensional CT angiography in diagnosis of intracranial aneurysms

目的探讨三维CT血管造影(3D-CTA)诊断颅内动脉瘤的价值。方法 192例临床怀疑有颅内动脉瘤的患者接受3D-CTA检查,用多种后处理技术观察有无动脉瘤并测量其大小,结果与数字减影血管造影(DSA)及手术所见进行对照。结果 3D-CTA共发现163个动脉瘤,分别位于前交通动脉(25.1%)、大脑前动脉(9.2%)、大脑中动脉(18.4%)、颈内动脉颅内段(14.7%)、后交通动脉(24.5%)、大脑后动脉(2.5%)、基底动脉(4.3%)和椎动脉(1.2%)。3D-CTA诊断颅内动脉瘤的敏感性和特异性分别为92%和94.1%。结论 3D-CTA是一种无创性检查手段,能有效地显示颅内动脉瘤。

Objective To discuss the value of three-dimensional CT angiography（3D-CTA） in diagnosis of intracranial aneurysms.Methods 3D-CTA was performed in 192 cases suspected to have intracranial aneurysms.Postprocessing techniques were used for detecting aneurysm and measuring its size.The results were compared with those of digital subtraction angiography（DSA） and intraoperative findings.Results A total of 163 aneurysms was detected by 3D-CTA in 192 patients.The aneurysm located in the anterior communicating artery accounted for 25.1%,in the anterior cerebral artery for 9.2%,in the middle cerebral artery for 18.4%,in the internal carotid artery for 14.7%,in the posterior communicating artery for 24.5%,in the posterior cerebral artery for 2.5%,in the basilar artery for 4.3%,and in the vertebral artery for 1.2%.The sensitivity and specificity were 92.0% and 94.1%,respectively.Conclusion 3D-CTA as a noninvasive examination can clearly demonstrate the intracranial aneurysms.