Vascular bifurcating surface reconstructed method based on cavity area triangulation

Abstract

The invention discloses a vascular bifurcating surface reconstructed method based on cavity area triangulation. The method comprises the following steps of: constructing a vascular skeleton line tubular surface; if a contour point of any cross section on a branch is inside an equivalent column of other branches in a bifurcating area, deleting the contour point, a side connected with the contour point and a triangular facet; carrying out two-dimensional mapping on the bifurcating area; equivalently projecting the bifurcating area into a two-dimensional planar topological graph; filling a two-dimensional topological plane by utilizing a cavity area triangulation method; reconstructing the surface of the bifurcating area; and reconstructing a whole vascular tree by utilizing a cavity area triangulation filling method. With the adoption of the vascular bifurcating surface reconstructed method based on the cavity area triangulation, branch devouring, bifurcating two-dimensional mapping, triangulation and triangular cavity filling are carried out around the original topological directions of the vascular branches and the size of vessels, so that the topologic shape of true vascular bifurcation is kept; the model reconstruction is accurate; the calculated amount is low; the robustness is strong; the reconstruction efficiency is high; and a reconstructed vascular model has complete vector properties and reconstructability.

Description

technical field [0001] The invention relates to the technical fields of biomedical engineering and computer vision, in particular to a blood vessel bifurcation surface reconstruction method for reconstructing a surface model of an arbitrary bifurcation area of ​​a blood vessel based on triangulation of a cavity area. Background technique [0002] The three-dimensional surface model of vascular structure is of great significance to clinical diagnosis, virtual surgery, radiotherapy and anatomy teaching. one of the main factors. The role of the three-dimensional model of blood vessels in clinical medicine is reflected in: (1) observing and determining the location of the lesion from the three-dimensional structure of the blood vessel, and making a rapid diagnosis; (2) conducting qualitative analysis on the shape of the pipeline such as length and size; ( 3) Provide an intuitive reference for surgical planning. [0003] The reconstruction of vascular tree can be generally divi...

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Problems solved by technology

[0005] However, vector modeling also has its own difficulties. One of the prominent problems is that it cannot efficiently and accurately reconstruct the closed transition surface of complex bifurcation regions.

One is because the number of branches in the bifurcation area is different. Simple vascular bifurcations generally have 2 or 3 branches, but complex vascular bifurcations have more than 6 branches; diameter and other complex and changeable, it is difficult to construct a smooth transition surface between branches

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