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目的：探讨双螺旋ＣＴ血管造影对主动脉夹层动脉瘤的诊断作用。方法：分析经双螺旋ＣＴ血管造影检查并手术或临床证实的大动脉瘤２０例。结果：双螺旋ＣＴ血管造影清晰显示夹层动脉瘤内膜瓣撕裂的三大影象征象，包括：内膜瓣钙化并腔内移位，内膜瓣撕裂的不同形态，破口的位置、大小；及炎性动脉瘤的影像学征象，包括动脉瘤外周增厚纤维化并少量胸腔渗液。结论：双螺旋ＣＴ血管造影具有很强的立体重建功能，不仅是诊断夹层动脉瘤可靠的手段，而且能为外科手术提供更详尽的信息。
Objective: To investigate the diagnostic value of double-helical CT angiography in diagnosis of aortic dissection aneurysm. Methods: 20 cases of aneurysms confirmed by double helical CT angiography and surgically or clinically confirmed. Results: Double helical CT angiography clearly showed three major imaging signs of dissection of the intima of the dissecting aneurysm, including calcification of the endothelium, intracavitary displacement, different forms of tear of the intima, location of the incision, Size; and imaging signs of inflammatory aneurysms, including peripheral aneurysm thickened fibrosis and a small amount of pleural effusion. Conclusion: Double helical CT angiography has strong stereo reconstruction function, which is not only a reliable method to diagnose dissecting aneurysms, but also provides more detailed information for surgery.