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Med Biol Eng Comput. 2006 Sep;44(9):805-21. Epub 2006 Aug 4.

Soft tissue modelling through autowaves for surgery simulation.

Author information

1
Robotics and Mechatronics Research Laboratory, Department of Mechanical Engineering, Monash University, P.O. Box 31, Clayton Campus, Clayton, VIC, 3800, Australia. Yongmin.Zhong@eng.monash.edu.au

Abstract

Modelling of soft tissue deformation is of great importance to virtual reality based surgery simulation. This paper presents a new methodology for simulation of soft tissue deformation by drawing an analogy between autowaves and soft tissue deformation. The potential energy stored in a soft tissue as a result of a deformation caused by an external force is propagated among mass points of the soft tissue by non-linear autowaves. The novelty of the methodology is that (i) autowave techniques are established to describe the potential energy distribution of a deformation for extrapolating internal forces, and (ii) non-linear materials are modelled with non-linear autowaves other than geometric non-linearity. Integration with a haptic device has been achieved to simulate soft tissue deformation with force feedback. The proposed methodology not only deals with large-range deformations, but also accommodates isotropic, anisotropic and inhomogeneous materials by simply changing diffusion coefficients.

PMID:
16960747
DOI:
10.1007/s11517-006-0084-7
[Indexed for MEDLINE]

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