一种数字减影图像中血管的自适应跟踪算法

AN ADAPTIVE TRACKING ALGORITHM FOR VASCULAR CONTOURS IDENTIFICATION IN DSA

本文介绍了一种数字减影（ＤＳＡ）血管图像自适应跟踪算法，并在模拟血管和真实的ＤＳＡ图像上得到了验证。只要给出血管的中轴线的起始点、宽度和初始方向，算法利用血管的位置、方向和直径、截面投影灰度分布的连续性实现自适应跟踪。算法由外推和更新过程组成，用匹配滤波器对其进行引导。滤波参数根据血管半径自适应调整。

s: An adaptive tracking algorithm for identification of vessel contours in DSA was developed and validated on synthetic vessel image and DSA image.Given the start -of -search point,the algorithm was completed by making use of the continuity of vascular centerline,orientation,diameter and density profile.The algorithm is consisited of an extrapolation-update process which was guided by a matching filter.The filter parameters were adapted to the vessel radius.