基于复合模型的软组织变形模拟算法  

SOFT-TISSUE DEFORMATION SIMULATION ALGORITHM BASED ON HYBRID MODEL

作　　者：谭时杰 郑津津[1] 周洪军[2] Tan Shijie;Zheng Jinjin;Zhou Hongjun(Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230026,Anhui,China;National Synchrotron Radiation Laboratory,Hefei 230029,Anhui,China)

机构地区：[1]中国科学技术大学精密机械与精密仪器系,安徽合肥230026 [2]国家同步辐射实验室,安徽合肥230029

出　　处：《计算机应用与软件》2021年第4期204-208,共5页Computer Applications and Software

基　　金：国家自然科学基金联合基金项目(GG2090090072,U1332130);111引智工程项目(B07033);安徽省重点研究与开发计划项目(1704a0902051)。

摘　　要：为满足虚拟手术中软组织变形的精确性和实时性要求,提出一种基于复合模型的软组织变形模拟算法。该复合变形模型包括复合网格的建立,复合网格中粗糙体网格应用有限元模型,精细表面网格应用基于位置动力学模型,通过变形计算流程实现变形模拟。复合模型与传统的有限元模型和基于位置的动力学模型相比,变形的精确性和实时性取得了更好的平衡。通过变形实例,表明复合模型对于实例模型也具有很好的展示效果。In order to satisfy the requirements of accuracy and real-time performance of soft-tissue deformation in virtual surgery,a novel algorithm based on hybrid model is proposed.The hybrid model included the establishment of hybrid mesh,implementation of finite element method(FEM)on the coarse volume mesh,implementation of position based dynamic(PBD)on the fine surface mesh,simulation by deformation computation process.Compared with FEM and PBD,the hybrid model acquires a better trade-off between accuracy and real-time performance.The real shape model shows satisfactory display result by given examples of hybrid model.

关 键 词：复合模型 有限元模型 基于位置动力学模型 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]