Yuping Duan; Weimin Huang; Huibin Chang; Kyaw Kyar Toe; Tao Yang; Jiayin Zhou; Jiang Liu; Soo Kng Teo; Chi Wan Lim; Yi Su; Chee Kong Chui; Chang, S., "Synchronous simulation for deformation of liver and gallbladder with stretch and compression compensation," Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE , vol., no., pp.4941,4944, 3-7 July 2013, doi: 10.1109/EMBC.2013.6610656
Abstract:
One challenge in surgical simulation is to design stable deformable models to simulate the dynamics of organs synchronously. In this paper, we develop a novel mass-spring
model on the tetrahedral meshes for soft organs such as the liver and gallbladder, which can stably deform with large time steps. We model the contact forces between the organs as a kind of forces generated by the tensions of repulsive springs connecting in between the organs. The simulation system couples a pair of constraints on the length of springs with an implicit integration method. Based on the novel constraints, our simulator can
efficiently preserve the volumes and geometric properties of the liver and gallbladder during the simulation. The numerical examples demonstrate that the proposed simulation system can provide realistic and stable deformable results.
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Funding Info:
This project is funded by the Agency for Science, Technology and Research (A*STAR), Singapore under grant number 092-148-0072, Image-guided Robert Assisted Surgical Training (IRAS)