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软组织形变实时仿真的非线性模型

张秋葵，罗立民，杨 武   

  1. 东南大学 影像科学与技术实验室，江苏 南京 210096
  • 收稿日期:2006-09-21 修回日期:2006-12-12 出版日期:2007-05-31 发布日期:2007-05-31

A Non-linear Deformable Model for Simulation of Real-Time Soft Tissue Deformation

ZHANG Qiu-kui, LUO Li-min, YANG Wu   

  1. Laboratory of Image Science & Technology, Southeast University, Nanjing 210096, China
  • Received:2006-09-21 Revised:2006-12-12 Online:2007-05-31 Published:2007-05-31

被引次数

18

摘要： 从软组织形变过程中的能量耗散角度出发，把对粘弹性组织形变的模拟和共轭梯度法能量下降的过程联系起来，提出了一种基于有限元的非线性计算模型。和目前手术仿真中广泛采用的显式计算模型相比该模型不仅稳定，而且更快速。实验结果表明该模型适合于软组织大形变的实时仿真.

关键词: 形变模型、虚拟手术、实时仿真、有限元

Abstract: Real-time simulation of the soft tissue behavior is a major obstacle in developing a virtual surgery system. In this research, simulation of viscoelasticity is related to a energy dissipation process in a conjugate gradient method. A new approach based on non-linear elasticity and finite element method is suggested, which is more robust and more efficient than the explicit method widely used in real-time surgery simulation. Experimental results show that the new method can be used in real-time simulation of soft tissue with large deformation.

Key words: deformable model, virtual surgery, real-time simulation, FEM