16层螺旋CT血管成像技术在主动脉夹层中的临床价值

目的:探讨16层CT血管成像在主动脉夹层的诊断和临床治疗中的应用价值。方法:27例主动脉夹层患者均行16层CT胸腹联合平扫和增强扫描,采用多平面重组(MPR)、最大密度投影(MIP)、容积再现(VR)及表面遮盖显示(SSD)等后处理方法,重点观察和评价主动脉夹层的真假腔、内膜片、内膜破口以及重要分支血管的受累情况。结果:原始横轴位图像对病变信息的存储最为可靠;不同的重组方式所得图像有不同的显示特点;27例均很好地显示了主动脉全程及其分支,显示真、假腔27例(100%)、显示内膜片(100%)、内膜破口24例(88.9%)、假腔内血栓形成9例(30%)。结论:16层螺旋CT血管成像可以全面显示主动脉夹层的病变和解剖细节,在主动脉夹层的诊断和临床治疗中有重要的临床应用价值。

Clinical Significance of the 16-slice Spiral CT Angiography in Aortic Dissection

Objective:To investigate the clinical significance of the 16-slice spiral CT angiography (SCTA) in the diagnosis and treatment of aortic dissection.Methods:Pre-and post-contrast CT scanning with 16-slice spiral CT (SCT) of chest and abdomen were performed in 27 patients with aortic dissection.Post-processing techniques including multi-planar reformation (MPR),maximum intensity projection (MIP),volume rendering (VR) and surface shaded display (SSD) were undertaken.The main attention was put on the true and false lumen,intimal flap,entry of intimal tear and the involvement of branches of aortic dissection.Results:The original axial images preserved the most reliable and fundamental information.Images obtained by different reformation and reconstruction techniques had different characteristics.The whole aorta and its branches in these 27 patients were displayed satisfactorily by 16-slice SCTA.Aortic dissection was assessed in 27 cases,with true and false lumen (27 cases,100%),intimal flaps (27 cases,100%),entry of intimal tear (24 cases,88.9%) and thrombosed false lumen (9 cases,30%). Conclusion:16-slice SCT angiography can fully display the anatomic details of aortic dissection,which is therefore of important clinical significance for the diagnosis and treatment.