目的:探讨320排螺旋CT血管成像(CTA)在主动脉夹层(AD)影像学诊断中的价值。方法:使用320排螺旋CT血管成像技术对112例AD患者进行平扫加增强,统计AD分型,受累的动脉分支,初次、再次破口次数及观察撕裂内膜征象。结果:112例AD患者中,De BakeyⅠ型占33.0%(37/112),Ⅱ型占12.5%(14/112),Ⅲ型占54.5%(61/112);受累头臂干动脉占15.1%(17/112)。撕裂内膜片占96.4%(108/112),真假双腔显影100%(112/112),内膜钙化移位占41.1%(46/112);初始破口占93.7%(105/112);再次破口占7.1%(8/112)。结论:320排螺旋CT血管成像技术具有快速、准确诊断的优点,是诊断AD及明确分型的可靠影像学检查之一。 Objective: To investigate the value of 320-slice spiral CT angiography (CTA) in the imaging diagnosis of aortic dissection (AD). Methods: One hundred and thirteen patients with AD were examined by using 320-slice spiral CT angiography. The AD type, the affected branches, the numbers of initial and reoperation and the signs of torn endometrium were observed. Results: Among 112 AD patients, De Bakey type Ⅰ accounted for 37.0% (37/112), type Ⅱ accounted for 12.5% ​​(14/112), type Ⅲ accounted for 54.5% (61/112) (17/112). Tissue tear accounted for 96.4% (108/112), true and false double-chamber imaging 100% (112/112), endometrial calcification shift accounted for 41.1% (46/112); initial break accounted for 93.7% (105/112 ); Break again accounted for 7.1% (8/112). Conclusion: The 320-slice spiral CT angiography has the advantages of rapid and accurate diagnosis and is one of the reliable radiological examinations for the diagnosis of AD and definite typing.