目的 探讨CT三维重建对主动脉 夹层临床诊断及分型的价值。方法 选择 我院2011年4月-2015年12月收治72例主动 脉夹层患者作为研究对象，均行CT平扫、 增强扫描及三维重建，记录CT表现及诊断 准确率。结果 主动脉夹层的CT典型征象 包括管壁高密度新月征、钙化斑块内移、 管腔内高密度线样内膜征，平扫及增强扫 描的分型诊断准确率为91.7%，三维重建 为100%，差异有统计学意义(P﹤0.05)。结 论 CT三维重建应用于DeBakeyⅠ-Ⅲ型主 动脉夹层患者中可直观显示初始破口及内 膜瓣、真假腔，利于明确病变部位及累及 范围，有助于分型，诊断准确率较高，为 主动脉夹层的理想检查方法。

Objective To explore the value of CT three-dimensional (3D) reconstruction in diagnosing and typing aortic dissection. Methods Seventy-two cases of patients with aortic dissection who were admitted in our hospital between April 2011 and December 2015 were selected as the study objects. All patients underwent CT plain scan, enhanced scan and 3D reconstruction. The CT findings and diagnostic accuracy were recorded. Results CT typical findings of aortic dissection included tube wall high density crescent signs, calcified plaque ingression and high density line-like intimal signs in lumens. The typing and diagnostic accuracy rates of plain scan and enhanced scan were 91.7%and that of 3D reconstruction was 100% (P<0.05). Conclusion The application of CT 3D reconstruction in patients with DeBakey I-III type aortic dissection can visually display the initial rupture and intimal flap, true and false lumens. It is conductive to confirming the lesions and involved range and helps to type. The diagnostic accuracy rate is higher. It is an ideal inspection method for aortic dissection.