基于几何特征的血管快速重建算法

A FAST RECONSTRUCTION ALGORITHM OF ARTERY BASED ON GEOMETRY FEATURE

针对X光造影图像中血管三维重建的特殊性,提出了基于血管几何特征的快速重建算法。该算法依据双目视觉的重构原理,按照一定的顺序,选择并匹配具有分叉,转折,末梢等几何特征的点作控制点。使得连接控制点的血管可以简化成一条具有一定宽度的线段。提取并生成各个控制点的三维信息,然后采用“化曲为直,多线逼近”的方法进行三维绘制。达到了快速、简便、数据量小、精度可控性高的效果,非常适合成像质量有限的X光造影图像中血管这类线形几何体的重建。最后在微机平台上,通过实际测试验证了上述优点。

An algorithm based on geometry feature of coronary artery is presented, according to the particularity of 3-D reconstruction of coronary artery in angiograms. The method of binocular stereo is adopted in this algorithm. In corresponding points matching,the control points which have the feature of intersection,corner and tip are chosen and matched, and make the blood vessel section between two control points can be simplified as a line with different diameter. Extract and generate the 3-D data from each control point. The method of ＂display the blood vessel with lines instead of curve,and simulate the curve by fine lines＂is used in 3-D rendering. By the test of experiment, the result demonstrates that this algorithm is fast, simple, small quantity in data, controllable in accuracy, it is suitable for the reconstruction of blood vessel which is the object of line geometrical figure.