目的 探讨多层螺旋CT血管成 像对腹主动脉瘤 ( a b d o m i n a l a o r t i c aneurysm，AAA)的诊断以及评估应用价 值。方法 对80例怀疑主动脉瘤患者作 为研究对象，采用多层螺旋CT血管成像 (MSCTA)技术对患者的腹主动脉及其分支 进行扫描，应用平面重组(multi-plane reconstruction，MPR)、最大密度投影 (max imum intensity projection ， MIP)及容积再现技术(volume rendering technique，VRT)、曲面重建(Surface reconstruction CPR)等技术对图像进 行重建，重建图像与数字显影血管造影 (Digital Subtraction Angiography， DSA)图像相比。并从MSCTA对AAA病灶分 型、累及范围、瘤体直径的技术观察等做 出诊断评估。结果 MSCTA比DSA更无创、 直观、立体地显示AAA，对AAA的分型、瘤 体直径、AAA与周围组织情况更加明确。 结论 MSCTA为临床诊断AAA分型及治疗方 法的选择提供重要的评估理论依据。

Objective To investigate the diagnosis and estimated value study of MSCTA on abdominal aortic aneurysm. Methods 80 cases with suspected aortic aneurysm were selected and given MSCTA to scan AAA and its branches. Image was reconstructed by multiplane reconstruction, max imum intensity projection and olume rendering technique. Compare the reconstructed image and Digital Subtraction Angiography image. Diagnostic assessment was made by observation of MSCTA on AAA focus types, involving range and tumor diameter. Results Compared with DSA, MSCTA can noninvasively, intuitively, stereoscopically show AAA and was more clearly on AAA types, tumor diameter, situation of AAA and surrounding tissues. Conclusion MSCTA provides important assessment basis on clinical diagnosis of AAA types and choice of treatment methods.