基于网格-无网格模型的软组织形变方法  

Soft tissue deformation method based on mesh and meshless model

作　　者：王娜 陈国栋[4] 许少剑[4] WANG Na;CHEN Guodong;XU Shaojian(School of Electronics and Information Engineering,Fuqing Branch of Fujian Normal University,Fuzhou 350300,China;Key Laboratory of Nondestructive Testing,Fuqing Branch of Fujian Normal University,Fuzhou 350300,China;Fujian Province University Engineering Research Center for ICH Digitalization and Multi-source Information Fusion,Fuqing Branch of Fujian Normal University,Fuzhou 350300,China;College 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]福建师范大学福清分校无损检测技术福建省高等学校重点实验室,福州350300 [3]福建师范大学福清分校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：《中国科技论文》2019年第7期803-807,共5页China Sciencepaper

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

摘　　要：针对传统软组织形变方法中真实感与实时性难以平衡的问题,提出了一种基于网格与无网格混合的软组织形变方法。在大变形的手术区域采用无网格方法,在小变形的手术区域采用基于质点弹簧的网格方法,充分发挥两者的优势,达到真实感与实时性要求。实验结果表明,基于网格与无网格混合的形变方法具有较高的计算效率,且形变效果较好,能够满足虚拟手术仿真的操作流畅性,增强虚拟手术仿真的真实感。Aiming at the problem that the reality and real-time of traditional soft tissue deformation methods are difficult to balance,a new method of soft tissue deformation based on mesh and meshless model is proposed.Meshless model is used in large deformation operation area,while the mesh method based on particle spring was used in small deformation operation area.The goal is to take full advantage of both achieving the realism and real-time requirements.The experimental results show that the mesh and meshless model has high computational efficiency and good effectness,which can satisfy the operation fluency of virtual surgery simulation and bring the operator a vivid visual experience at the same time.

关 键 词：虚拟手术 软组织形变 质点弹簧模型 无网格模型 混合模型 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]