脑血管造影一直被公认为诊断脑血管狭窄程度的“金标准”。脑血管支架植入术的治疗决策常根据脑血管造影所示狭窄程度而定。一般症状性脑动脉狭窄>50%,无症状性脑动脉狭窄>70%的患者需进一步行脑血管支架植入术。然而,近十年来通过脑血管造影检查来评价脑动脉狭窄程度的不足逐步被认识,脑血管造影常不能明确脑动脉病变的性质,经常低估或高估相关病变的严重程度,无法判断临界病变(脑血管狭窄程度为50%~70%的病变)是否需要行脑血管支架 Cerebral angiography has long been recognized as the “gold standard” for diagnosing the degree of cerebral vascular stenosis. Stenting of cerebrovascular stents is often based on the degree of stenosis shown by cerebral angiography. General symptomatic cerebral artery stenosis> 50%, asymptomatic cerebral artery stenosis> 70% of patients need further cerebral stenting. However, the shortcomings of assessing the degree of cerebral artery stenosis by cerebral angiography in the past decade have been gradually recognized. Cerebral angiography often fails to identify the nature of cerebral arterial lesions, and often underestimates or overestimates the severity of related pathologies, and can not judge the critical lesion Cerebral vascular stenosis of 50% to 70% of the lesions) need to be treated with cerebrovascular stent