血管内超声(intravascular ultrasound,IVUS)是近年来临床诊断血管病变的新手段之一,是利用安装在心导管尖端的微型超声探头由血管内探测管腔的介入性超声诊断技术。用于观察动脉管腔的大小,管壁收缩和舒张功能变化等。IVUS提供的图像不仅能观察粥样斑块在血管纵轴切面的分布, Intravascular ultrasound (IVUS) is one of the new methods of clinical diagnosis of vascular lesions in recent years. It is an interventional ultrasonography technique that detects the intraluminal lumen by using a miniature ultrasonic probe mounted on the tip of a cardiac catheter. Used to observe the size of the arterial lumen, wall contraction and diastolic function changes. The images provided by IVUS can not only observe the distribution of atherosclerotic plaque in the longitudinal axis of blood vessels,