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Automatic Mesh Generation in Geometrical Construction of Virtual Surgery

Author: DingMei
Tutor: XiaLinHua；PanZhenKuan
School: Qingdao University
Course: Computer Software and Theory
Keywords: Virtual Surgery Geometric Modeling Mobile tetrahedron (Marching Tetrahedron) Delaunay triangulation Delaunay refining
CLC: TP399
Type: Master's thesis
Year: 2005
Downloads: 182
Quote: 2
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Abstract


3D medical image reconstruction is one of the hot topics of research in the field of medical simulation , and automatic mesh generation technology is the critical problem of 3D medical image reconstruction . 3D medical image reconstruction is a fundamental part of the entire virtual surgery system , virtual surgery system late to the finite element interpolation calculation and cutting suture and other operations , and therefore the high demands of the the virtual surgery geometric modeling part . From the classic algorithm Delaunay algorithm adapt to the finite element calculation , combining traditional virtual surgery geometric modeling method the mobile tetrahedron (Marching Tetrahedral) method , a new method suitable the medical surgery geometric modeling . The improved MT algorithm using standard regular tetrahedral units replace traditional regular hexahedral cells divided into tetrahedral units as MT algorithm grid initialization unit . Practice has proved that the improved MT algorithm implementation unit body mass and the edge of the grid internal separatist the tetrahedron quality has significantly improved . The size of the cell body of the the grid internally generated this way is consistent and quality in order to achieve the the ideal grid standards required by the finite element method , which has laid a good foundation for virtual surgery late finite element interpolation . The latter part of this paper the use of Delaunay refined algorithm is proposed for improved MT count the Mesh Edge tetrahedral mesh quality judgments and improve the optimization algorithm , to further improve the quality of the algorithm to generate the grid . Practice has proved that the high efficiency of the algorithm execution , adaptability , friendly interface, high stability . This paper focus on the study of the basic algorithm of the the virtual surgery geometric modeling , 2D Delaunay mesh generation algorithm ideas and data structures to do intensive research and experimental results are given .

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