june, 2015

29junAll Day01julInternational Conference on Computational and Mathematical Biomedical Engineering

Event Details

CMBE 2015 at Ecole Normale Superieure de Cachan (ENS Cachan) will feature minisymposia, invited speakers, and awards.

Ricardo Ortiz will present a paper at the conference.

A Hybrid Approach to Simulate Tissue Behavior During Surgical Simulation

By Venkata S. Arikatla, Ricardo Ortiz, Andinet Enquobahrie, David Thompson, Suvranu De, and Deanna Sasaki-Adams


Modeling interaction between deformable and rigid objects efficiently and accurately is one of the most important tasks for interactive surgical simulation. The Finite Element Method (FEM) has be-come very popular in this context due to its versatility in representing elastic bodies with irregular geometric features and diverse material properties. In this work we propose a hybrid FEM approach to simulating realistic tissue behavior that uses a non-linear formulation in the vicinity of the interac-tion while employing a less accurate and inexpensive linear formulation elsewhere. A semi-implicit time stepping is used for the non-linear portion of the domain. This avoids expensive domain de-composition strategies required to maintain consistency at the interface and allows for regular system assembly using a non-overlapping interface and single solver for both domains. This study demon-strates the advantages of our novel approach, especially for the case of real-time surgical simulation.


June 29 (Monday) - July 1 (Wednesday)