A Survey on Simulation of Virtual Surgery Soft Tissue Force Feedback Algorithm

Virtual surgery simulation system is a typical application of virtual reality technology in the medical field. Firstly, in order to select a suitable way for real-time deformation and force feedback algorithm, after compared several classical numerical integration algorithm, we select the mid-point method as the deformation algorithm in this paper. The feedback force calculation is based on a spring-damper model. The total amount of the form variables of all virtual mass-spring in the system is the surface deformation of an object; the total amount of the forces of all virtual mass-spring equals to the contact force of the object surface. The algorithm is simple in the deformation process. It can also well meet the requirements of real-time interactive systems. Finally, a good virtual surgery simulation system must be able to give the operator with experience of synchronization of visual and tactile in the process of interaction. In this experimental system, we use OpenGL 3d graphics standard to draw and render visual model, at the same time, use Open Haptic packages to give haptic rendering. The PHANTOM force feedback device is used as a real-time interactive device. Finally, the simulation results verify the effectiveness of the system.