基于多分辨投影匹配和对应点分析的三维血管轴重建

Reconstruction of Vessel Axis Based on the Matching of Multi-Resolution Projections and Analysis of Corresponding Points

提出了一种多分辨投影匹配与对应点分析相结合的血管轴重建方法.将三维空间划分成许多小立方体,向多个方向上投影,如果投影区域中含有血管轴,则认为这个正方体区域包含血管轴.将此区域再分割为多个小区域,重复上述匹配过程,直到获得所需要的精度,从而建立一个血管轴的粗略模型.利用这个模型分析DSA投影中血管中心点的对应关系,并插值重建出单点连续的血管轴.实验数据采用实拍的DSA序列图像,取得了很好的重建效果.

This paper propose a novel method of Reconstruction of Vessel Axis on matching of multi-resolution projections and analyzing of corresponding paints. The 3-D space is divided to several cubes. The cubes are projected to the actual projection directions separately. If a cube-projection includes vessel axes points, it is believed that the cube include 3D vessel. Then we divide the cube to several smaller cubes and repeats above process until the needed precision is reached. An approximate 3D model of vessel axes is constituted according to projections of the cubs. The corresponding relation of vessel axes between different direction projections is analyzed according to the approximate 3D axes model. Then we can constitute the accurate continuous 3D vessel axes by interpolation method. We use an actual DSA sequence as the experimental data and the result is satisfactory.