螺旋CT血管造影术在夹层动脉瘤诊断中的应用

Application of spiral CT angiography in the diagnosis of aortic dissection

目的评价螺旋CT血管造影技术在夹层动脉瘤诊断中的临床应用价值。方法21例夹层动脉瘤行螺旋CT连续容积增强扫描,并将获得的数据传至工作站行三维重建,结合横断面及三维重建图像进行分析。结果根据Debakey分型,De-bakeyⅠ型10例,DebakeyⅢ型11例,两型中不典型夹层各2例。典型夹层动脉瘤的CT征象主要是分离移位的内膜、真假腔、主动脉壁增厚、钙化、主动脉不规则扩张;不典型主动脉夹层动脉瘤的征象为主动脉壁呈半月状或环状增厚,伴或不伴有内膜钙化内移。结论螺旋CT血管造影检查在诊断主动脉夹层动脉瘤中是一种安全有效的便于治疗后观察对比的方法。

Objective To analyze the usefulness of spiral computed tomography angiography （SCTA） in the diagnosis of aortic dissection （AD）. Methods SCT continuous volume enhanced scans were performed in 21 patiesnts with AD and then all acquired data were transferred into workstation so as to generate 3D images, The transverse section images were analyzed together with 3D images, Results According to Debakey＇s classification, Debakey＇s type Ⅰ and type Ⅲ were found in 10 and 11 cases, respectively, of the both, atypical dissection in 2 each. The CT signs of typical aortic dissection were mainly separate and shifted intimal flaps, true and false lumina, thickening and calcification of aortic walls, and irregular dilatation of aortic lumina, The CT signs of atypical AD were semilune -form or circular thickening of aortic walls associated with or without intimal calcification and internal shift, Conclusion SCTA is a safe and effective means to diagnose AD, simultaneously, it is convenient for follow - up observation of therapeutic efficacy.