目的评价128层螺旋CT血管成 像在周围动脉闭塞性疾病诊断中的临床 应用价值。方法 前瞻性获取21例下肢动 脉闭塞性疾病患者(42侧肢体)，平均年 龄(71±12.7)岁，获得知情同意后在东 芝Aquilion One 128层螺旋CT上进行下 肢动脉CTA检查(造影剂：碘帕醇370mgI/ mL(Iopamidol，BRACCO)，双相注射，造 影剂剂量按体重分组)，原始图像经过 VR、MIP、CPR后处理后获得重建图像。 其中有12例共12侧下肢在CTA检查后1周 内行DSA检查。由两位有经验的放射科医 生共同分析评价CTA显示双下肢各支动 脉段图像质量情况及各段狭窄程度，并 与DSA比较。结果 21例患者均顺利完成 双下肢动脉CTA检查,图像显示度评分为 (2.86±0.351)分，CTA静脉重叠评分为 (0.14±0.467)分，共有38侧下肢CTA未 发生静脉污染，占90.48%(38/42)；4侧 下肢CTA发生不同程度的静脉强化，占 9.53%(4/42)。以DSA为金标准，CTA显示 动脉正常及轻度狭窄的敏感性96.30%， 特异性98.04%，阳性预测值98.73%，阴 性预测值94.33%。结论 128层螺旋CT能 够全面清晰显示双下肢动脉病变，为疾 病诊断提供快速、有效且可靠的诊断手 段，对临床诊断和治疗具有重要指导意 义。

Objective To evaluate the diagnostic value of 128-MDCT angiography inperipheral arterial occlusive disease. Methods Prospective for 21 patients with lower extremity artery occlusive disease (42 side body), average age (71±12.7), and obtain informed consent in Toshiba Aquilion One 128 layer spiral CT on lower limb arterial CTA (contrast agents: iodine 370 mgi palmer alcohol/mL (Iopamidol, BRACCO), bipolar, injection contrast medium dose groups by weight), the original image through VR, MIP, CPR image post-processing after reconstruction. A total of 12 patients with 12 lower limbs underwent DSA examination within 1 week after CTA examination. Two experienced radiologists were employed to analyze and evaluate the image quality and stenosis degree of each artery segment of the lower limb shown by CTA, and compared with DSA. Results 21 patients were successfully completed the double lower limb artery CTA examination, image display score was (2.86±0.351), CTA venous overlap score was (0.14±0.467)points, a total of 38 lower limb venous CTA without pollution, accounting for 90.48% (38/42). 4 lower limbs CTA of different degrees of venous enhancement, accounted for 9.53% (4/42). With DSA as the gold standard, CTA showed normal artery mild stenosis and a sensitivity of 96.30%, specificity of 98.04%, positive predictive value of 98.73%, negative predictive value of 94.33% showed obvious stenosis. Conclusion 128- MDCT can clearly show lower extremity arterial disease with important imformation for clinical diagnosis and treatment planning.