Design And Implementation Of Virtual Surgery Simulation System

Virtual surgery is a developing research trend which inosculated virtual reality technology and modern medicine. Virtual surgery researching consists computer technology, computer graphics,medicine,biomechanics, computer vision,image processing, artificial intelligence and so on. Virtual surgery system provides a virtual surgery environment for surgeons who can make operations in the environment. Users can get graphical or haptical feedback when they make operations, and would get the experience of surgery. Virtual surgery has provided a new method for surgery training. The traditional training always uses artificial models, bodies and animals. However, the artificial modes can’t express the complexity of organs. Bodies are very expensive, difficultly available for dissection and just can use once. What’s more, it is inaccurate, expensive and may introduce ethical questions to use animals.Virtual surgery can solve these problems. It can lead the operators well to the nature of surgery and help trainees to gain experience in surgery. New surgeons can practise operations and rehearse surgery in the system. However, most virtual surgery systems are limited to a specific operation scene and operation mode. Lack of comprehensive planning, the system versabtility and extension ability is weak, which can not meet the demand of various types of hospital operation.In this background, this thesis focuses on the research of the design and implement of the virtual surgery simulation system which is universal for various operations in modern hospital business. Firstly, in the step of requirement analysis, based on virtual surgery theory and the pratical application background of hospitals, we give the definition of system scope, including funcation requirement and performance requirement. Besides, we also analyze the business process of virtual surgery. In the design and implement stage, we give the system structure, including physics structure, logic structure and function structure. In detail, the system adopts C/S architecture and is developed in MFC environment. The system is composed by 5 kernerl compontments: model management, scene management, behavior engine, scene rending and interative interface. These compontments respectively provide basic organic model data, sence logic, coordinate control and user interaction. In the following, we detailly introduce the organic model method based on Vega Prime, collision detection technology based on bounding box method, the virtual force feedback technology based on PHANToM and the implement of behavior engine based on FSM and XML. In the end of this thesis, we we test the system and analyze the test result.