目的:探讨16层螺旋CT下肢血管CTA的质量保证与质量控制。方法:22例下肢血管可疑病变患者患者行MSCTA检查,并行MIP、VR、MPR和CTVE重建。结果:22例下肢动脉病变的MSCTA均能获得准确的诊断,与DSA和手术结果比较,其敏感性、特异性和准确性均为100%。结论:加强16层螺旋CT下肢血管CTA的质量保证与质量控制具有重要的临床价值. Objective: To investigate the quality assurance and quality control of vascular CTA in lower extremity of 16-slice spiral CT. Methods: Twenty-two patients with suspected pathological changes of lower limbs underwent MSCTA and reconstructed with MIP, VR, MPR and CTVE. Results: Twenty-two patients with arterial lesions of lower extremity were able to obtain accurate diagnosis. The sensitivity, specificity and accuracy were 100% compared with DSA and surgical results. Conclusion: It is of important clinical value to enhance the quality assurance and quality control of vascular CTA in lower limbs of 16-slice spiral CT.