目的探讨64层螺旋CT对下肢动 脉疾病的评估价值以及64层螺旋CT两种不 同扫描方法对下肢动脉显示效果的对照研 究。方法 41例临床有不同程度症状且初 诊疑为下肢动脉疾病的患者，分为两组， 19例患者行自动触发扫描，22例患者行手 动触发扫描，行64层螺旋CT扫描，根据检 查结果判断64层螺旋CT对下肢动脉的评估 价值，其根据对下肢动脉的显示效果分别 评估后进行对照研究。结果 41例患者中 38例能显示腹主动脉下段至胫腓动脉全 程；19例行自动触发扫描的患者中12例图 像质量佳且血管显示清晰，5例部分下肢 动脉图像质量欠佳且管壁模糊，2例图像 部分下肢动脉图像质量差且无诊断价值； 22例行手动触发扫描的患者中5例图像质 量佳且血管显示清晰，5例部分下肢动脉 图像质量欠佳且管壁模糊，1例图像部分 下肢动脉管腔内狭窄程度无法诊断，1例 部分下肢动脉节段图像质量差且无诊断价 值。结论 手动触发扫描对腘动脉远侧下 肢动脉显示效果优于自动触发扫描，且64 层螺旋CT下肢动脉造影对下肢动脉疾病的 诊断具有较好的评估价值。

Objective To discuss the evaluation value of 64 slice spiral CT detecting of lower extremity arteriosclerosis obliterans and compare the effect of two different CT scan methods. Methods 41 patients with different symptoms and firstly diagnosed as lower extremity arteriosclerosis obliterans were divided into two groups.19 patients underwent auto bolus triggering method compared with 22 patients underwent manual bolus triggering method. And the results of the display of lower extremity artery were evaluated within the two groups. Results The images of 38 among 41 patients can show a throughout panorama from the abdominal aorta to the tibia peroneal artery; 5 of the 19 patients underwent auto bolus triggering method got poorer images of the lower extremity artery, and 2 patients among the 5 who got poorer images were distal popliteal artery.5 of the 22 patients underwent manual bolus triggering method got poorer images atproximal popliteal artery. Conclusion The manual bolus triggering method is better than auto bolus triggering method, and lower limb angiography of 64 spiral CT in the diagnosis of lower extremity artery disease is of great value assessment.