螺旋CT血管成像作为一种无创性血管成像技术已常用于主动脉夹层动脉瘤的诊断,但升主动脉的运动伪影除了损害影像质量外,还极似内膜片或假腔,文献上已有将其误诊为夹层动脉瘤的报道。作者对171例曾行主动脉增强螺旋CT扫描者作了回顾性分析。目的是了解此种伪影的发生率、幅度和范围,以及不同的采集方式和重建算法对它的影响。其中87例采用360°线状内插法重建,84例采用180°线 Spiral CT angiography, as a noninvasive vascular imaging technique, has been commonly used in the diagnosis of aortic dissecting aneurysms. However, the motion artifact of the ascending aorta, in addition to impairing image quality, also resembles an endocardium or pseudo-cavity There will be misdiagnosed as dissecting aneurysm reported. The authors retrospectively analyzed 171 patients who underwent aortic helical CT scan. The purpose is to understand the incidence, magnitude and range of such artifacts, as well as the impact of different acquisition methods and reconstruction algorithms. Among them, 87 cases were reconstructed by 360 ° linear interpolation, and 84 cases adopted 180 ° line