Efficient Nonlinear FEM for Soft Tissue Modelling and Its GPU Implementation within the Open Source Framework SOFA

Authors:
Olivier Comas;Zeike A. Taylor;Jérémie Allard;Sébastien Ourselin;Stéphane Cotin;Josh Passenger
Affiliations:
BioMedIA Lab, The Australian e-Health Research Centre, Brisbane, Australia and INRIA Alcove, Lille, France;University College London, London, United Kingdom;INRIA Alcove, Lille, France;University College London, London, United Kingdom;INRIA Alcove, Lille, France;BioMedIA Lab, The Australian e-Health Research Centre, Brisbane, Australia
Venue:
ISBMS '08 Proceedings of the 4th international symposium on Biomedical Simulation
Year:
2008

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Abstract

Accurate biomechanical modelling of soft tissue is a key aspect for achieving realistic surgical simulations. However, because medical simulation is a multi-disciplinary area, researchers do not always have sufficient resources to develop an efficient and physically rigorous model for organ deformation. We address this issue by implementing a CUDA-based nonlinear finite element model into the SOFA open source framework. The proposed model is an anisotropic visco-hyperelastic constitutive formulation implemented on a graphical processor unit (GPU). After presenting results on the model's performance we illustrate the benefits of its integration within the SOFA framework on a simulation of cataract surgery.