主动脉CTA及后处理技术对夹层动脉瘤的诊断价值

目的：探讨多层螺旋CT对主动脉夹层动脉瘤的诊断价值及其临床应用.材料与方法：对51例夹层动脉瘤患者进行MSCT平扫及增强扫描,并利用原始数据在工作站进行MPR、CPR及VR后处理.结果：横轴位图像上可观察到真假腔形态、大小、剥脱的内膜片、破口位置及内膜和主动脉壁钙化,而后处理重建图像能观察主动脉整体受累情况,确定内膜剥离范围,显示破口、内膜与各分支血管之间的关系,按DeBakey分型,表现为1型16例,Ⅱ型10例,Ⅲ型25例.结论：主动脉CTA是诊断夹层动脉瘤的首选检查方法,综合运用后处理技术对提高图像质量及确诊率具有较高的价值.

Enhanced Helical CT Scanning for Dissecting Aneurysm of Aorta

Purpose： To investigate enhanced MSCT scanning of dissecting aneurysm of aorta and its clinical valve. Materials and Methods： Enhanced helical CT scanning was performed on 51 patients with dissecting aneurysm of aorta. Their original images urdentwent MPR, CPR and VR reconstructed. Results： On the horizontal axial image, the true and false channels , intimalflap, the location of the ruptu：：e and aortic mural calcification could be observed. By reconstructed images, aortic artic arch invovement could be observed , the extent of intirnal tear could be identified and the relation between the intima and vessels concerned could be demonstrated . By the DeBakey classification 16 cases were designated as having type I , 10 cases were type II , 25 were type III. Conclusion： Helical CT scanning is an ideal imaging method for the diagnosis of aneurysm of aortic . It is important to select compositive post-imaging techniques to ensure the acquisition of high quality images and accurate diagnostic information.