冠状动脉支架术是治疗冠状动脉狭窄的重要手段之一,但术后仍有10%～20%的患者可能出现支架内再狭窄,所以早期准确地评价支架术后再狭窄问题正日益受到重视。目前,冠状动脉造影(CAG)仍是诊断支架内再狭窄的金标准,但缺点是有创伤,且不能提供支架内血管壁病变的详细信息。普通CT机观察血管内支架的通畅情况容易受支架的材 Coronary stenting is one of the most important ways to treat coronary artery stenosis. However, 10% ~ 20% of patients may have in-stent restenosis after surgery. Therefore, the early and accurate evaluation of post-stent restenosis is receiving more and more attention. Currently, coronary angiography (CAG) is still the gold standard for the diagnosis of in-stent restenosis, but the disadvantage is trauma and can not provide detailed information on the vessel wall lesions in the stent. Ordinary CT machine to observe the smooth condition of the stent easily scaffolding material