Topological Relationship Construction And Geometric Connection Of Human Vascular System Vessel

In recent years, the study of cardiovascular attracts more and more people’s attention. Every year,the number of deaths from cardiovascular disease(CVD) has been rising stage in our country,At the same time, the high medical costs also cause a huge economic burden to the society, This will force the doctor eagerly want to know the composition of the heart’s blood vessels. With the development of medical imaging technology, modern medical therapy in interventional radiology treatment of cardiovascular disease is one of the most timely and effective way. It becomes an important clinical way that complicated operation and high-risk cardiovascular interventional procedures prompt doctors to use simulation system for training. The connection topology of three-dimensional reconstruction of vascular and vascular and vascular parameters between segments of the section between the heart is an important basis for the development of virtual surgery system, which is a simulation of real blood flow in blood vessels and the physiological behavior providing fundamental support, at the same time it’sa ble to study hemodynamics visualization, such as vascular stenosis disease pathology [1].The cardiovascular system is a complex system,to build a complete cardiovascular system,it’s of great significance to simulate the flow in blood vessel in the clinical medicine.This article is based on the VTK visualization tools and Marching Cubes algorithm to reconstruct the cardiovascular level, regarding the vascular system as consisting of a branch of a vascular tree structure, each branch of blood vessels and is composed of several segments, for a period of use bounding box interactive segmentation method was proposed, and make full use of visual and decision ability of the person to realize effective segmentation of complex vascular system;For the segmented vessel segment, that is the main surface,we mades with a round table body model as a mathematical analytical model vessel segment and using the principle of least squares and the steepest gradient descent to calculate the coordinates of the vertices of the main surface of the circular table model fitting vessel segment.In order to establish the topological relationship between vascular segment, we put forward a successor by the predecessor and successor as well as the number to represent the topological relations between different branches of blood vessels as well as the vascular segment between points,and designing the label algorithm to implement the topological relationship between paragraphs quasi automated build.Due to adopting the fixed position of bounding box of blood vessel segmentation and modeling, so that more modeling vessel segment intersection overlap may exist,We design algorithms with connection between the branch vessel segment complete detection and removal of overlapping portions of adjacent vascular segment,ang utilize the torus to achieve a geometric connection between two paragraphs.This paper designed the cardiovascular period of topological relationships between building and geometric connection methods, in order to realize the construction of the cardiovascular topology and laid the foundation for the further simulation vascular blood flow.