Research Of Blood Vessel Three-dimensional Reconstruction From Biplane Projections

Atherosclerosis is one of the dangerous diseases that seriously endanger human health, while its diagnose and therapy depend on both the accurate position and extent of hemadostenosis. The 3D (three dimensional) reconstruction can obtain visual vessel, helping doctors to diagnosis the hemadostenosis by analyzing the radius, length and cubage of narrow part. So, 3D reconstruction of blood vessel has important clinic significance, and has been an active area of research native and abroad.The paper is the research of 3D reconstruction of blood vessel from biplane projections. Firstly, 2D(two dimensional) information of blood vessel from two angiograms, including the edge, skeleton and radius, is extracted. Secondly, the 3D skeleton tree is reconstructed by two 2D skeletons. Thirdly, the blood vessel section is reconstructed. Major contents of this dissertation are as follows:1,A method based on adaptive circle template tracing and mathematical morphology is proposed. Firstly, the centerline is ascertained by circle template tracing. Secondly, the blood vessel is detected by differential operation and mathematical morphology. Thirdly, skeleton is extracted by biggest circle disk. Lastly, edges and radius of blood vessel is extracted by ascertaining intersection points between skeleton perpendicular line and blood vessel area.2,The skeleton is stored by using the data structure of binary tree association with list. A method that benefits for matching skeleton tree based on line and point matching is proposed. The reconstructed 3D skeleton tree is optimized by simple dynamic model. The results of experiments both on a 3D curve and real blood vessel show best performance.3,The blood vessel between any two adjacent points on the 3D skeleton tree is reconstructed by generalized cylinder (GC) model. The calculation formularies for ratio of hemadostenosis,length and cubage of the narrow part are presented. VC++ and OpenGL are used for programming in this dissertation. While the program has these functions, including observing the 3D vessel from any angle and obtaining parameters of hemadostenosis about any blood vessel section.