目的探讨彩色多普勒超声 (CDFI)及CT血管造影术(CTA)对评估锁骨 下动脉狭窄(SAS)患者动脉狭窄程度的准 确性及影像特点。方法 回顾性分析60例 SAS患者临床资料,以数字减影血管造影术 (DSA)检查结果为标准，对比CDFI、CTA检 查对动脉狭窄程度评估的准确性，分析两 种图像的影像特点。结果 CDFI对动脉狭 窄程度评估的符合率为90.0%(54/60)，与 CTA的96.7%(58/60)对比，差异无统计学 意义(P＞0.05)。SAS患者CDFI图像可见患 侧椎动脉管径明显窄于健侧血管，部分有 椎动脉返流特征，少数严重狭窄或闭塞 者，图像见星点样血流信号。CTA图像则 显示，轻、中、重度动脉狭窄患者可见不 同程度的软斑块、钙化斑块或混合斑块形 成，狭窄处造影剂充盈欠佳，动脉完全闭 塞者造影剂均不显影，管腔内局部无对 比剂充盈。结论 CDFI及CTA图像均在SAS 患者的动脉狭窄处有其特异性的影像表 现，临床可将其作为诊断SAS及评估动脉 血管狭窄程度的可行性途径。

Objective To investigate the accuracy of color Doppler flow imaging (CDFI) and CT angiography (CTA) in evaluating the degree of subclavian artery stenosis (SAS) in patients and their imaging features. Methods The clinical data of 60 cases of patients with SAS were analyzed retrospectively. Based on the results of digital subtraction angiography (DSA), the accuracy in evaluation of the degree of arterial stenosis was compared between CDFI and CTA. The image features of the two kinds of methods were analyzed. Results The coincidence rate of CDFI in evaluating the degree of arterial stenosis was 90% (54/60), and the difference was not significant (P > 0.05) in comparison with CTA[96.7% (58/60)]. CDFI images of patients with SAS showed that the vertebral artery diameters of affected side were significantly narrower than those of the contralateral vessels. Some patients showed reflux of vertebral artery, and few patients were with serious stenosis or occlusion. The images showed star-like blood flow signal. CTA image showed that there were different degrees of soft plaque, calcified plaque and mixed plaque formation in patients with mild, medium and severe arterial stenosis. At the stenosis sites, the filling of contrast agents was not so good, resulting in the contrast agents in patients with complete arterial occlusion did not develop. Besides, there was no contrast agents filling in some parts of the lumen. Conclusion Both CDFI and CTA images have their specific imaging features in artery stenosis sites of patients with SAS. And it can be used as a feasible way for diagnosis of SAS and evaluation of artery stenosis.