The Japanese Journal for Medical Virtual Reality

Online ISSN : 2187-2201
Print ISSN : 1347-9342

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Volume 9, Issue 1

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Original Contribution

Virtual Reality Training System of the Optical Access in Initial Trocar Insertion for Laparoscopic Surgery

Michitaka Fujiwara, Masamichi Sakaguchi, Hiroki Hidaka, Takuya Watanab ...

2011 Volume 9 Issue 1 Pages 1-6
Published: November 10, 2011
Released on J-STAGE: December 20, 2012

DOIhttps://doi.org/10.7876/jmvr.9.1

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In this paper, we show development of virtual reality training system of the optical access in initial trocar placement for laparoscopic surgery. We measured the trocar inserting motion data including trocar position, vertical force, and rotational torque in the actual operations. and then we designed force feedback device which combined with image display system.

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AMulti-rate Online Remesh Method for Haptic Needle Insertion Simulation into Nonuniform Soft Tissue

Kazuyoshi Tagawa, Takeshi Fujii, Satoshi Yamaguchi, Hiromi T. Tanaka

2011 Volume 9 Issue 1 Pages 7-16
Published: November 10, 2011
Released on J-STAGE: December 20, 2012

DOIhttps://doi.org/10.7876/jmvr.9.7

JOURNAL FREE ACCESS

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Recently, there are growing needs for fast and accurate needle insertion simulations with realistic sensations. However, it takes large computation time to realize such simulations. Our goal is to construct a needle insertion training system for trainee doctors to practice the needle insertion operations. In this paper, we propose a multi-rate online remesh method to achieve a real time and accurate needle insertion simulation. In this approach, tetrahedral volume mesh that located near the needle is rapidly subdivided by binary bisection algorithm. And then, accurate friction force of the needle is calculated from relative velocities between the needle and nodes of subdivided small tetrahedra.

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