Real-time Volumetric Haptic and Visual Burrhole Simulation

13 years 6 months ago
Real-time Volumetric Haptic and Visual Burrhole Simulation
This paper describes real-time volumetric haptic and visual algorithms developed to simulate burrhole creation for a Virtual Realitybased craniotomy surgical simulator. A modified Voxmap pointshell algorithm [4, 7] is created to simulate haptic interactions between bone cutting tools and voxel-based bone. New surface boundary detection and force feedback calculation methods help reduce “force discontinuities” of the original Voxmap point-shell algorithm. To maintain stable haptic update rates, new forces are calculated outside the haptics rendering loop. A multi-rate haptic solution [2] is used to introduce calculated forces into the haptics loop and to interpolate forces between updates. A bone erosion method is also created to simulate bone drilling capabilities of different tools. 3D texture-based volume rendering is used to display the bone and to visually remove bone material due to drilling in real-time. Volumetric shading is computed by the GPU of the video card. The algor...
Eric Acosta, Alan Liu
Added 04 Jun 2010
Updated 04 Jun 2010
Type Conference
Year 2007
Where VR
Authors Eric Acosta, Alan Liu
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