Tomography; Xray computer; Lower extremity artery imaging; Quality control; Artery stenosis; Digital Subtraction Angiography.

体层摄影术，X线计算机；下肢动脉成像；质量控制；动脉狭窄；血管造影术。

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Objective to explore the reliability of computer tomography angiography (CTA) and digital subtraction angiography (DSA) in the diagnosis of carotid artery stenosis.

目的探讨CT血管造影术(CTA)与数字减影血管造影术(DSA)相比在诊断颈动脉狭窄疾病方面的可靠性。

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Purpose: To evaluate the role of spiral computer tomography angiography (SCTA) in the diagnosis of Pulmonary Embolism (PE).

目的：评价螺旋CT血管造影（SCTA）在诊断肺动脉栓塞（PE）中的作用。

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