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

Abstract

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.