血管横截面提取是血管狭窄检测的关键步骤，本文针对基于中心线的血管很截面提 取。首先通过 Ta-Chih Lee 提出的通过通过坐标收缩的算法获得其中心线的位置。其次在 确定所需要获取的横截面的起始和终止位置后，从起始点出发获取中心线上一点的邻域上 所有中心线上点坐标，并进行主成分分析，从而获得该点的切向量。最后通过对截取平面 上的点进行坐标变换获取截面图像。并对合成数据和真实数据进行检测，结果表明该方法 具有较高的准确度。适合用于狭窄度检验。

Vascular cross section extraction is the key step in the vascular stenosis detection, this paper based on the centerline of the vessel is cross section.First through the Ta - Chih Lee is put forward through coordinate shrinkage algorithm for the location of the center line.Second in determining the need for the cross section of start and stop position, starting from the starting point for Central Line is all center on the neighborhood of the online point coordinates, and principal component analysis, to gain the tangent to that point.Finally, point of intercepting plane coordinate transformation for cross section image.And to test the synthetic data and real data, the results show that the method has high accuracy.Suitable for use in a narrow degree of inspection.