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Proceedings Paper

Development of surgical simulator based on FEM and deformable volume-rendering
Author(s): Yoshitaka Masutani; Yusuke Inoue; Koichi Ishii; Nori Kumai; Fumihiko Kimura; Ichiro Sakuma
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Paper Abstract

In this paper, we describe our novel surgical simulation system, which provides FEM-based real-time deformation, interaction by using haptic device, and high-quality visualization of the liver and inner blood vessel structures based on 3D texture-based deformable volume-rendering. Our software system consists of mainly four components of independent processes and threads; (1) 3D texture based volume rendering, (2) haptic device input / output, (3) FEM computation, and (4) inter-process communication management. Tetrahedral meshes for FEM computation and volume-rendering are updated for every frame of image display and deformation. For faster FEM computation, we employed the central-difference method for forced displacement calculation. We implemented our system with dual Pentium Xeon 3GHz PC workstation with 1G byte RAM, a video card with nVIDIA Quadro4 900XGL GPU, and Windows XP Professional OS. As a haptic device, PHANToM desktop was employed. We used liver data of 128x128x128 matrix size as 3D-texture data, which was segmented in abdominal X-ray CT Angiography data set and colored in grayscale and dual-indexed coloring based on radial basis function interpolation. By using window size of 480, we obtained refresh rate of 67 frames/sec for image display and 16 msec for haptic device output. Our preliminary study shows feasibility of surgical simulators with FEM and deformable volume-rendering.

Paper Details

Date Published: 5 May 2004
PDF: 8 pages
Proc. SPIE 5367, Medical Imaging 2004: Visualization, Image-Guided Procedures, and Display, (5 May 2004); doi: 10.1117/12.535122
Show Author Affiliations
Yoshitaka Masutani, Univ. of Tokyo (Japan)
Yusuke Inoue, Univ. of Tokyo (Japan)
Koichi Ishii, Research Ctr. of Computational Mechanics, Inc. (Japan)
Nori Kumai, Research Ctr. of Computational Mechanics, Inc. (Japan)
Fumihiko Kimura, Univ. of Tokyo (Japan)
Ichiro Sakuma, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 5367:
Medical Imaging 2004: Visualization, Image-Guided Procedures, and Display
Robert L. Galloway Jr., Editor(s)

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