Research of tissue deformation in virtual surgery simulation
虚拟手术仿真中人体软组织形变技术的研究

This paper studied the tissue deformation of Virtual Surgery Simulation, using OpenGL to establish the virtual tissue deformation system based on mass-spring model. Discussion was around the fidelity and real-time of tissue deformation in Virtual Surgery Simulation. By comparing quadrilateral topologies, regular hexagon topology based on mass-spring model was proposed, the dynamic model was discussed as well as its numerical integration method and force feedback calculation model of tissue deformation. Concerning the lack of nearest neighbor mass calculating algorithm in virtual surgical instrument contacting the tissue surface, a new method was proposed. The results show that the modified algorithms have better stability and real-time in tissue deformation simulation.