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虚拟鼻腔镜手术仿真系统
其他题名Virtual Nasoscope Surgery Simulation System
谭珂
学位类型工学硕士
导师田捷
2004-05-01
学位授予单位中国科学院研究生院
学位授予地点中国科学院自动化研究所
学位专业模式识别与智能系统
关键词虚拟手术 鼻腔镜 仿真系统 弹性形变模型 有限元模型 碰撞检测 力反馈技术 Virtual Surgery Nasoscope Simulation System Elastical Deformation Model Finite Elements Model Collision Detection Force Feedback
摘要鼻腔镜手术创而小、恢复快,但由于鼻腔结构复杂且手术操作难度火而难以掌握, 而研究和应用虚拟手术仿真技术,研制虚拟鼻腔镜手术仿真训练系统可以使学习者沉浸 于虚拟的场景内,体验并学习如何应付各种临床手术的实际情况,可以通过视、触觉感 知学习各种手术实际操作。这样人_人节约了教学训练的费用和时川,使非熟练人员实习 手术的风险性大大降低,是未来外科手术的重要应用需求。 本文在鼻腔镜外科手术仿真的应用背景下,为了满足其手术仿真的特殊性能需求, 研究计算量小并保持真实感的面绘制物理模型、弹性有限元方法;研究虚拟鼻腔组织器 官的弹性形变模型及其预处理算法;研究基于面绘制的碰撞检测算法和基于质点一弹簧 一阻尼模型的实时力反馈技术。文中阐述的理论和方法适用于虚拟外科于术中的弹性彤 变物体,且都基于线性弹性理论以及有限元模型。其物理模型和力反馈模型能够对包含 数千个结点的模型进行实时的形变和力反馈计算,通过对这些方法的研究和应用,实现 了一套虚拟鼻腔镜手术仿真系统,该系统针对四类手术操作,通过力反馈交互设备对山 医学图像得到的鼻腔模型进行实时操作,实现了弹性形变模拟、碰撞检测、触觉反馈、 流血特效等,通过临床测试和应用,学习者反映良好,研究结果表明:该系统有较强的 实时性,因而具有较高的实用价值。
其他摘要Nasoscope surgery, which leaves little operative wound and is followed by a quick recovery, is difficult to perform because of the complicated structure of nasal cavity. The research in and application of virtual surgery simulation technology, and the development of simulation training system of nasoscope surgery can immerge students in virtual environments, experience and lcsarn how to deal with various conditions of clinical operation, and at the same time experience and learn various practical operations by the senses of sight and touch. This saves the training cost and training times, and reduces the risk of the experimental operations for the unexperienced surgeors. This technology is badly needed in the surgery of the future. This paper is a research in surface-rendering physical model of less computerization and more reality in the application of nasoscope surgery simulation, in order to meet the special requirements of surgery simulation. It also is a research in elastical deformation model and pre-processing algorithm, and in collision detection algorithm, and in real-time force feedback based on mass-spring-damper model. The theories and techniques in this paper apply to elastical deformation object in virtual surgery, also based on linear elasticity theory and finite elements model. Their physical model and force feedback model can do a real-time calculation of deform and force feedback of the models with thousands of nodes. The research in and the application of these techniques lead to a system of nasoscope surgery simulation. This system, used in four kinds of operation, through force feedback device operates in real-time the models of nasal cavity structure built from medical images, so that deformation simulation, collision detection, hapic feedback, blooding effect. The clinical test and application of this system make students highly appreciate it. The result of the research shows that this system is of real-time character and of high practical value.
馆藏号XWLW775
其他标识符775
语种中文
文献类型学位论文
条目标识符http://ir.ia.ac.cn/handle/173211/6761
专题毕业生_硕士学位论文
推荐引用方式
GB/T 7714
谭珂. 虚拟鼻腔镜手术仿真系统[D]. 中国科学院自动化研究所. 中国科学院研究生院,2004.
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