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Simulation Rendering of Surgical Scene and Platform Construction in Virtual Surgery System

Author: ZhengGuangChao
Tutor: GuLiZuo
School: Shanghai Jiaotong University
Course: Computer Software and Theory
Keywords: Virtual Reality Hydromechanics Fluid rendering Particle system System modular
CLC: TP391.9
Type: Master's thesis
Year: 2008
Downloads: 138
Quote: 0
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Abstract


The late 20th century, the rapid development of minimally invasive endoscopic techniques, surgical technology. Minimally invasive surgery and traditional surgery with less trauma, quicker recovery, fewer complications, and short duration of anesthesia. Minimally invasive surgery is a wide range of development and application. However, due to the characteristics of the minimally invasive surgery, doctors can only be seen through the endoscope local status of the patient's body, so that greatly increased the difficulty for doctors surgery, and rely on the experience of value to the high than traditional surgery. So, the doctor, the preoperative training is very important. Explore virtual surgery system purpose is the use of computer virtual reality technology to provide surgical training environment to a doctor, the doctor within a shorter time to master the minimally invasive surgical technique. This paper studies the guarantee system visually realistic surgical scene rendering, and the entire virtual surgery platform construction. First vivo blood flow through the study of fluid mechanics numerical method for solving the Navier-Stokes equations rendering endoscopic vision, caused by the endoscope lens blur effect processing of training doctors in this particular environment. Then by simulating the other elements of the scene: the floating debris of tissue fluid, body cavity background texture and surgical instruments modeling, surgery scenes more realistic. The last chapter briefly hierarchical architecture and modular design of the system, and how to make the whole system to reduce the degree of coupling, each scene rendering module conducted experiments to determine the best visual effect, and tells the story of how the blood flow rendering sub-module integrated into existing analog system. This work and innovations are as follows: 1. Focused rendering module and system training effect is directly related to blood flow. The comparative analysis of different numerical methods, the decision is one of the most suitable method of the system to achieve blood flow simulation. 2. Blood flow rendering module and algorithm in accordance with the needs of the system changes and innovations, such as the treatment of the boundary condition. Commissioning of the relevant parameters, the visual effects more realistic rendering. 3. Use different technology to simulate other scene elements simulated tissue fluid floating objects, such as particle system with a different set of mixed background texture processing, the innovative use of the matrix pipes accurate positioning of surgical instruments model. Modular reconstruction of the framework of the entire surgical system, the use of the design pattern knowledge on the the module interaction between low coupling design, greatly improve system scalability and maintainability. The blood flow using OpenGL rendering sub-module integrated into the virtual surgery training system platform. The innovative design VTK analog OpenGL primitive polygon source data integration method.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation
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