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Web-based VR Training Simulator for Percutaneous Rhizotomy

Web-based VR Training Simulator for Percutaneous Rhizotomy. MMVR. Ying Li, Ken Brodlie and Nicholas Phillips *. http://www.scs.leeds.ac.uk/vis/ ying /. School of Computer Studies, University of Leeds, UK. * Department of Neurosurgery, Leeds General Infirmary, UK. January 29, 2000.

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Web-based VR Training Simulator for Percutaneous Rhizotomy

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  1. Web-based VR Training Simulator for Percutaneous Rhizotomy MMVR Ying Li, Ken Brodlie and Nicholas Phillips * http://www.scs.leeds.ac.uk/vis/ying/ School of Computer Studies, University of Leeds, UK * Department of Neurosurgery, Leeds General Infirmary, UK January 29, 2000

  2. Contents • Motivation • Surgical procedure • The simulator • Conclusions

  3. Motivation • The limitation of current VR training systems Dedicated, expensive equipment • The advantages of web based VR environment Accessible, scalable, low cost • It is possible VRML

  4. Lesion Generator The Surgical Procedure - Percutaneous Rhizotomy Insert needle electrode at correct position & orientation on face Locate & puncture foramen ovale to access and burn ganglion nerve

  5. Why is Simulation Useful • Highly skilled operation Especially to locate foramen ovale • Awkward to train new staff Patient awake for part of the procedure • Risky Dissection of carotid artery will affect blood supply to brain

  6. Our Simulator • A simple web-based simulator • Aims to be an adjunct to training of neurosurgeons Shorten period of training Understanding of procedure and risks involved

  7. The Simulator-Architecture • Client-based system Download self-contained simulation to client Web Server download VRML world extended with Java EAI to provide simulation Browser Single download, no dependency on network

  8. The Simulator-Virtual World • Extend reality by multiple views From the eye of the surgeon From the eye of the needle electrode Eye of the surgeon Eye of the needle Java EAI

  9. The Simulator-Simulating The Surgical Practice • Place landmarks • Virtual planes

  10. The Simulator-Manipulating The Tools • Controller • Rotate and translate according to rules of surgical procedure • Three VRML worlds co-ordinated through Java EAI

  11. Solution: Detect collision with eye of the needle electrode The Simulator-Hitting The Target • Collision detection between objects not supported in VRML Only collision with viewer

  12. Success

  13. Oops….

  14. Conclusion • Client-based WWW surgical training system is fast, cheap, … • Collision detection between needle and multiple complex objects is efficient • Various surgical tasks have been simulated • Complexity versus ease of use ?

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