基于局部动态模型的软组织形变建模与仿真

计算机科学 ›› 2013, Vol. 40 ›› Issue (10): 283-288.

基于局部动态模型的软组织形变建模与仿真

李艳东,朱玲,叶秀芬,孙明

齐齐哈尔大学计算机与控制工程学院齐齐哈尔161006;齐齐哈尔大学计算机与控制工程学院齐齐哈尔161006;哈尔滨工程大学自动化学院哈尔滨150001;齐齐哈尔大学计算机与控制工程学院齐齐哈尔161006

出版日期:2018-11-16 发布日期:2018-11-16
基金资助:
本文受国家青年科学基金项目(61100103),齐齐哈尔大学青年教师科研启动支持计划项目(2012k-M13)资助

Modeling and Simulation of Soft Tissue Deformation Based on Local Dynamic Model

LI Yan-dong,ZHU Ling,YE Xiu-fen and SUN Ming

Online:2018-11-16 Published:2018-11-16

摘要/Abstract

摘要： 选择人体软组织模型作为研究对象,针对医学触诊训练的特点,提出了可变区域的局部质点-弹簧/阻尼器(ALMSDM)模型。该模型具有位置可变及区域可扩展的动态特性,改善了以往文献中局部建模方法静态限定的局限,解决了全局“面模型”形变恢复能力差及数据量大的问题。结合ALMSDM的特点,提出了顶点法向量局部更新与预计算策略,从而极大地提高了系统的实时性。从形变恢复能力、反馈力及实时性3方面对不同模型下的系统性能进行了评价,结果显示所提算法能够保证虚拟软组织形变仿真的精确性与实时性,具有可行性与通用性。

关键词: 虚拟手术,软组织形变,局部动态模型,触觉反馈,面模型,体模型

Abstract: This paper selected human soft tissue model as a research object and proposed local mass-spring/damper(ALMSDM)according to characteristics of medical palpation training．Dynamic characteristics of this model include position-changing and extensible area,which improves the restrictions of static limitation in local modeling method in existing literature and resolves the problem of poor recovering ability and large volume data in global surface model．And the strategy of local updating for vertex normal and pre-computing was also proposed combining ALMSDM’s features．This strategy dramatically enhances the real-time of system whose performance is assessed from recovery,feedback force and real-time under different models．This can guarantee the accuracy and real-time of virtual soft tissue deformation and simulation,thus verifies feasibility and universal property of this proposed algorithm.

Key words: Virtual surgery,Soft tissue deformation,Local dynamic model,Tactile feedback,Surface model,Body model

李艳东,朱玲,叶秀芬,孙明. 基于局部动态模型的软组织形变建模与仿真[J]. 计算机科学, 2013, 40(10): 283-288. https://doi.org/

LI Yan-dong,ZHU Ling,YE Xiu-fen and SUN Ming. Modeling and Simulation of Soft Tissue Deformation Based on Local Dynamic Model[J]. Computer Science, 2013, 40(10): 283-288. https://doi.org/

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