Research On Virtual Surgery-Based On Fast Finite Element

With the rapid development of computer technology, the computer application fields are becoming wider and wider. Virtual Surgery is an application of virtual reality in modern medicine. As an interdiscipline research topic, virtual surgery incorporates the researches about Computer Science, Computer Graphics, Sensor Technology, Biomechanics, Modern Medicine, Scientific Computing Visualization and so on. The object of surgery simulation system research is to provide a reusable environment for surgery training and planning, and ease the propagation of new surgery methods.This paper generalizes the current status of surgery simulation system in main components. Then discusses several keys techniques of virtual surgery such as collision detection, geometrical modeling, strength modeling, distortion simulation and cutting simulation:1) In the aspect of collision detection, building an AABB binary sort tree to reduce the complex of collision detection.2) In the aspect of geometrical modeling, this paper adopts tetrahedron as basic union. According to the special of the brain, this paper adopts a more easy method.3) In the aspect of strength modeling, this paper presents finite elements simulating distortion and cutting. This method can get high accurate and more stable result than mass-spring model.4) In the deformation simulation, in order to improve the interactive speed, this paper research all methods in now days, presents a new method according the new matrix is like former matrix. This method can reduce computing complex greatly and further shortens the computation time by making full use of matrices pre-computation.5) In the last, the paper combining the test points out the defect of the methods presented in this paper, and what I should be improved in the future.