目的 探讨多排螺旋CT(HD750)血 管造影在下肢动脉人工血管旁路移植术 后中长期随访的价值。方法 2004年7月 至2011年2月对连续108例下肢动脉人工 血管旁路移植术后3年以上患者进行了多 排螺旋CT(HD750)血管造影检查，采用容 积显示(VR)；最大密度投影(MIP)；曲面 重建(CPR)；仿真内窥镜(VE)及高级血管 分析(AVA)等多种后处理技术并结合原始 横轴位图像进行综合分析。结果 多种后 处理图像相结合共显示移植血管147条， 可以准确评估人工移植血管的位置及形 态、吻合口处病变情况、移植血管腔内狭 窄程度、侧支循环开放和并发症等。其中 53例患者(64条移植血管)与同期DSA检查 进行了比较研究。全部病例MDCTA检查结 果均符合临床诊断要求。结论 多排螺旋 CT(HD750)血管造影术对人工移植血管的 评价是安全、可靠和准确的，可作为目前 在下肢动脉病变人工血管旁路移植术后中 长期随访的首选影像诊断方法。

Objective To investigated the diagnostic value of 64 multi-detector helical CT angiography in artery of lower extremity middle and long-term follow up after artificial vascular graft. Methods 108 cases with artery of lower extremity postoperative artificial vascular graft after 3 years were performed with MDCTA. The data was transmitted to ADW4.3 workstation, and reconstructed by MIP, VR, CPR and generally analyzed with orginal axial images. Results In 108 cases with 147 grafts, MDCTA is can revealing the location and shape of artificial vascular graft, and evaluating collateral circulation and complication exactly. Conclusion 64 MDCTA is reliable and accurate in evaluating the artificial vascular graft, gradually become the first modality diagnose and evaluate artery of lower extremity follow up after artificial vascular graft at present.