This work was motivated by the growing use of Non-invasive surgery for more and more operations and the need of simulators for surgeons training. We chose
here to model and interact with a liver. This simulation raises several issues:
we need Real-time deformable model for the liver , force feedback for the
interaction, and realistic rendering to get a simulator as "real" as possible.
We rely on the graphics hardware for performing a fast collision detection
with a guaranteed frame rate between the liver model and the surgical tools. Real-time animation is achieved
thanks to a multi-resolution model that locally refines or simplifies the
simulated object over time in order to optimize the computational effort. A guaranteed frame rate
can be ensured, thanks to the load management enabled by multiresolution.
Interaction is performed thanks to a haptic device: an articulated arm with force feedback (PHANToM).
Realistic visualisation is provided thanks to a multi-pass rendering. The liver surface is covered with undistorted cells thanks to a new texturing techniques that non-periodically maps a few precomputed patterns on triangles that tile the surface. Animated textures are used for enhancing the changes of the liver's surface aspect under the tools actions.
For further details:
http://www-evasion.imag.fr/Membres/Marie-Paule.Cani/foie.html
http://www-evasion.imag.fr/Membres/Fabrice.Neyret/laparo/index-eng.html
Contacts: Gilles.Debunne@image.fr -
