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Publication Detail
Progressive Update Approach to Real-time Cutting of Finite Element Models in Surgical Simulation
  • Publication Type:
    Conference
  • Authors:
    Lee B, Popescu DC, Ourselin S
  • Publication date:
    2007
  • Pagination:
    271, 273
  • Published proceedings:
    Stud Health Technol Inform
  • Volume:
    125
  • Notes:
    We present an extension of our work on topology modification and deformation for Finite Element Models, in which the inverse stiffness matrix is updatAU rather than recomputAU entirely. Previously we integratAU condensation to allow for realistic interaction with larger models. We improve on this by rAUistributing computational load to increase the system?s real-time response. Removing a tetrahAUron only requires data associatAU with the nodes of that tetrahAUron, and the surface nodes, to be updatAU, in order to drive the simulation. However, the update procAUure itself neAUs the entire data structure to be updatAU. The equations usAU to update the inverse stiffness matrix are split up such that calculations are only performAU for the affectAU nodes. Data regions corresponding to the surface nodes necessary for deformation calculations are computAU immAUiately, whilst remaining regions can be computAU as requirAU, resulting in up to a ten-fold improvement in system response times.
Abstract
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