| Author | Kim, J., De, S. and Srinivasan, M.A. |
|---|---|
| Title | An Integral Equation Based Multiresolution Modeling Scheme for Multimodal Medical Simulations |
| Year | 2003 |
| Editor | IEEE VR2003 Conference |
| Abstract | Novel modeling paradigms are necessary to cope with the requirement of physically based real time simulation of laparoscopic surgical procedures using force feedback. Complex, high-resolution models are computationally expensive. Force feedback requires an update frequency of about a kHz, which precludes the use of computationally expensive models. In this paper we propose a method to circumvent this difficulty by introducing a multiresolution modeling technique, where a reasonably coarse global model is locally enhanced using mesh subdivision and smoothening. The global model is based on a discretization of the boundary integral representation of the problem. The use of precomputation and structural reanalysis techniques result in a very rapid computation procedure. The local refinements are provided in the vicinity of the tool-tissue interaction area by adaptive subdivision of the boundary element mesh. This technique results in interactive graphical as well as haptic rendering rates for reasonably complex models. |