Journal
COMPUTERIZED MEDICAL IMAGING AND GRAPHICS
Volume 36, Issue 5, Pages 356-365Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compmedimag.2012.03.001
Keywords
Virtual surgery simulation; Deformable modeling; Boundary element method; Physical simulation
Funding
- Chinese NSFC research fund [61190124]
- international research fund of STCSM [10440710600]
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Modeling organ deformation in real remains a challenge in virtual minimally invasive (MIS) surgery simulation. In this paper, we propose a new hybrid deformable model to simulate deformable organs in the real-time surgical training system. Our hybrid model uses boundary element method (BEM) to compute global deformation based on a coarse surface mesh and uses a mass-spring model to simulate the dynamic behaviors of soft tissue interacting with surgical instruments. The simulation result is coupled with a high-resolution rendering mesh through a particle surface interpolation algorithm. Accurate visual and haptic feedbacks are provided in real time and temporal behaviors of biological soft tissues including viscosity and creeping are modeled as well. We prove our model to be suitable to work in complex virtual surgical environment by integrating it into a MIS training system. The hybrid model is evaluated with respect to efficiency, accuracy and robustness by a series of experiments. (C) 2012 Elsevier Ltd. All rights reserved.
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