虚拟手术中肝脏形变仿真系统  

Liver Deformation Simulation System in Virtual Surgery

作　　者：王娜 陈国栋[4] 许少剑[4] WANG Na;CHEN Guo-Dong;XU Shao-Jian(School of Electronics and Information Engineering,Fuqing Branch of Fujian Normal University,Fuzhou 350300,China;Key Laboratory of Higher Education of Fujian Province for Nondestructive Testing(Fuqing Branch of Fujian Normal University),Fuzhou 350300,China;Engineering Research Center of Higher Education of Fujian Province for ICH Digitalization and Multi-Source Information Fusion,Fuzhou 350300,China;School of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福建师范大学福清分校电子与信息工程学院,福州350300 [2]无损检测技术福建省高等学校重点实验室(福建师范大学福清分校),福州350300 [3]非遗数字化与多源信息融合福建省高校工程研究中心,福州350300 [4]福州大学物理与信息工程学院,福州350108

出　　处：《计算机系统应用》2019年第10期92-97,共6页Computer Systems & Applications

基　　金：国家自然科学基金(61471124);福建省自然科学基金(2016J01293,2017J01107,2018J01787);福建省中青年教师教育科研项目(JA15574);校级国家自然基金校内培育项目(KY2017NS05)~~

摘　　要：由于肝脏具有复杂的生物力学特性,因此在进行形变仿真时,计算量大而难以达到实时性要求;同时在对肝脏形变实时仿真时却很难达到真实感.为了解决这一矛盾,需要研究一种可以自动依据手术器械操控区域及施力大小而动态转换的混合模型,通过理论分析提出了一种肝脏网格与无网格混合模型的构建方法.实验结果表明,该算法具有较高的计算效率且形变具有较好效果,能够满足虚拟肝脏手术仿真的真实感与实时性要求,对虚拟肝脏软组织手术研究具有一定的指导意义.Liver has complex biomechanical properties.Therefore,it is difficult to achieve real-time requirement because of the large amount of calculation in deformation simulation.At the same time,it is inaccessible to achieve the reality in real-time simulation of liver deformation.In order to solve this contradiction,a hybrid model which can automatically change the operating area and force of surgical instruments is developed.According to theoretical analysis,a construction method for the mesh and meshless model of liver is proposed.The experimental results show that the algorithm has high computational efficiency and good deformation effect,which can meet the realistic and real-time requirements of virtual liver surgery simulation.The conclusions drawn in this paper can be used to guide the study of virtual liver soft tissue surgery.

关 键 词：虚拟手术 肝脏形变 碰撞检测 力反馈 混合模型 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]