Adaptive Remeshing

Project info

Fundings

  • USIAS project
  • Inria

Objective

  • Topological representation using combinatorial maps

  • Multiscale and a re-meshing approaches for real-time simulations of surgical cutting


Duration 01.10.2013 — now


Website USIAS project


Project description

Surgical procedures rely heavily on the experience of surgeons and therefore involves a number of risks. Computer-based simulation can reduce this risk as it is a strong candidate for surgical training, guidance and surgical robotics. A realistic simulation needs to take into account of soft tissue manipulations like cutting, tearing and needle insertion. Since these manipulations require an update of the topolocigal structure of an object – so-called topological changes – they are specifically challenging. In the following, we will explain how we face this challenge in the team MIMESIS.

 

Hybrid continuum-lattice approach

The outcome of such surgical interventions is significantly affected by the microstructure of the material (discontinuities, holes, interfaces) remaining some of the most difficult surgical gestures to simulate. We are interested in the development of a numerical tool capable of the interactive simulation of surgical cutting using a multi-domain lattice-continuum approach. Around the cutting region, a mesoscopic discrete lattice approach suitable for initiation of cuts and subsequent tears is used. The remaining regions can be modeled by a continuum approach or through model reduction approaches based on pre-computations. The algorithms are implemented within the SOFA framework which is targets real-time computations, with an emphasis on medical simulation and the work is being performed within Legato team in direct collaboration with MIMESIS team.

The presentation can be found here.

Crack propagation within an heterogeneous medium

Fracture due to tearing with an hybrid FEM-LEM model [Video found here]

The final goal of this project is to simulate in real-time the cutting of heterogeneous of soft-tissues using two-scale model instead of using one macroscopic model as in Courtecuisse, H., Allard, J., Kerfriden, P., Bordas, S. P. a, Cotin, S., & Duriez, C. (2014). Real-time simulation of contact and cutting of heterogeneous soft-tissues. Medical Image Analysis, 18(2), 394–410. doi:10.1016/j.media.2013.11.001.

The work is partially funded by USIAS – University of Strasbourg Institute for Advanced Study. Details can be found here.

Results

People involved

Stéphane Cotin

Research Director
Lionel Untereiner

Lionel Untereiner

Post-Doctoral Fellow

Huu Phuoc Bui

Post-Doctoral Fellow
Hadrien Courtecuisse

Hadrien Courtecuisse

Research Scientist
David Cazier

David Cazier

Full Professor
Christoph Paulus

Christoph Paulus

Post-Doctoral Fellow