颈部动脉夹层CTA影像特征分析

Imaging features of cervical artery dissection with CTA

目的探讨颈部动脉夹层(cervical artery dissection,CAD)的CT影像特征,希望有助于提高早期诊断率。方法收集29例CAD患者的CT影像学资料,并结合DSA检查结果进行回顾性分析。结果 29例患者中,颈内动脉夹层26例,椎动脉夹层3例,有2例同时累及两支血管或同一血管不同节段。内膜瓣及"双腔征"、"火焰征"、"鼠尾征"、"珠线征"、动脉瘤样扩张为其特征性表现。结论 CTA是诊断CAD的重要手段,且诊断准确率高,能弥补DSA的诊断缺陷,完全能成为CAD患者首选的影像学筛查方法。

Objective To investigate imaging features of muhi-slice spiral CT in cervical artery dissection, and to improve the early diagnostic rate. Methods We retrospectively reviewed of 29 cases of muhi-slice spiral CT and DSA confirmed cervical ar- tery dissection. Results In the total of 29 patients with CAD, there were 26 patients with internal carotid artery dissection, 3 with vertebral artery dissection, 2 cases involving two vessels or different segments of the same vessel. The characteristic features of CAD were intimal flaps, double-lumen sign, occlusion with a flame-like and mouse tail appearance, string and pearl sign, and aneurysmatic expansion. Conclusion CTA is an important and high accuracy method for the diagnosis of cervical artery dissection. It can make up for the deficiency of DSA and be the preferred screening method for patients with cervical artery dissection.