Real Time Organ Deformation Model Based on Structural Beams for VR Laparoscopic Training System

Suguru USHIKI, Chihiro MATSUGUMA, Takeshi KOISHI , Toshiya NAKAGUCHI, Norimichi TSUMURA, Yoichi MIYAKE

Chiba University,

To appeare in Japanese Journal of Society for Medical Virtual Reality Vol.6, No.1, pp.43-50, 2008

We propose a deformable model for elastic organ based on structural mechanics under the consideration of multi-point-contact for medical training systems using Virtual Reality (VR) technology. In a previous paper, we proposed an organ deformation model which approximates a liver deformation by a single-beam deformation based on the structural mechanics. The calculation cost of the single-beam model is much less than that of the 3D Finite element method (FEM) since the beam consists of one-dimensional elements. In this paper, we propose a multi-beam model under the consideration of multi-point-contact by extending the single-beam model. A real-time deformation can be realized and the proposed model was implemented in the laparoscopic surgery training system.

[PDF] (To appeare)[in Japanese]