3D Modeling And Visualization Of Heart Soft Tissue Motion

The gradual maturity of virtual reality technology has made it play an increasingly important role in various fields.In the medical field,more and more researchers have begun to focus on virtual surgical simulation systems.For a long time,authenticity and real-time performance have always been an important research content of virtual surgery technology,the modeling of biological tissues is a key part of the virtual surgical system,which largely determines the performance of a virtual system.Therefore,this paper studies three aspects of the geometrical methods,physical methods and GPU-based virtual simulation systems.First,based on the research of common geometric modeling methods,the Bezier method is used to carry out the soft tissue geometry modeling,and the defect of the Bezier method and the soft tissue features are used to optimize the geometric modeling process.Above all,re-parameterization solves the problem of repeated reverse calculation of control points in the Bezier method,which improves the calculation speed.Afterwards,the base surface superposition method based on prior information is proposed,so that the deformation model has the advantage of Bezier smoothing and continuous,and it also has the ability to fit the surface of the local irregular deformation.Finally,the relevant optimization process of the geometric modeling is experimented.Second,through the research and analysis of common physical modeling related methods,this paper uses the particle spring model to achieve the physical modeling of the heart soft tissue surface,and combines the biological characteristics of biological tissue,the classical particle spring model is optimized.Firstly,the optimization of the topological structure of the mass point spring model improves its ability to fit the anisotropy of soft tissue.After that,the elasticity parameter dynamization enables the particle spring model to have a wider range of nonlinear relationship fitting capabilities.Finally,based on the virtual body spring,the secondary modeling of the elastic coefficient is performed so that the model can fit the creep and relaxation characteristics of the biological tissue according to the virtual body spring elongation.The above optimization has improved the ability of the mass point spring model to adapt to the physical modeling of biological tissues,and has carried out relevantmathematical derivation and experimental verification.Third,based on the theoretical results of geometric modeling and physical modeling,using GPU acceleration technology and related three-dimensional graphics rendering technology,in the VS2012 compiler environment,combined with OpenGL 3D graphics library,using C++ and GLSL language to achieve an interactive the dynamic modeling and visualization of cardiac soft tissue system,and optimizes the usability and practicality of the system.