Key Technologies Of Virtual Surgical Training System

The training system of virtual surgery is the application of the technology of virtual reality in modern medicine,and is designed to simulate surgical procedures that may be encountered in the phenomena of virtual reality applications. It is through the process of surgical operations to simulate the entire process. A complete set of surgical simulation system will be include the research of model building, the implementation of the technology of collision detection , the cutting of soft tissue with scalpel, suturing, deformation and realistic graphical rendering.The research and development of the training system is based on the SOFA framework. First of all, I will build the models. Each model is composed of collision model, behavior model and visual model. The collision model is charge of the collision detection of model. After that the collision is to occur, it will be response to the behavior model by mapping mechanism. Behavior model is mainly to achieve the calculation of force, gravity, quality of objects, various algorithms, and so on, while the information which is calculated by behavior model will be mapped to the visual model. The visual model mainly responsible for the display with information, it will be feedback to the operator. Once the model is complete, it can be loaded into the scene. The collision model is composed of ball element. Therefore, the collision algorithm is the ray tracing algorithm. The deformation is adopted in the spring-mass algorithm in order to simplify the calculation.The cutting operation is a key technology of the training system. The cutting algorithm is based on the smallest unit split tetrahedron cut algorithm. Through the calculation of the intersection after cutting, it will change the data structure and topology of soft tissue. Finally, it will map back to the visual model.