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Comparing electro-optical and electro-magnetic guidance systems in the preparation of minimal access surgical training environments

Comparing electro-optical and electro-magnetic guidance systems in the preparation of minimal access surgical training environments
Comparing electro-optical and electro-magnetic guidance systems in the preparation of minimal access surgical training environments
Introduction: High quality visual images for virtual environment generation were prepared using two comparative spatial co-ordinate referencing systems, identifying the position of individual frames in the recorded video database. Methodology: A cadaveric shoulder arthroscopy database was recorded and replayed using an ATM Network. An Electro-optical (Optotrak?) spatial reference system is compared with an Electro-magnetic (Flock of Birds?) system, for position tracking of an arthroscope in the virtual environment. Results: 1. Electro–Optical equipment is used safely in the operating theatre environment 2. Electro-Magnetic devices are affected by ferromagnetic environments 3. Electromagnetic devices are inexpensive, and thus more suitable for a training environment 4. It was necessary register the two systems relative to each other using ‘public domain’ algorithms. The precision of the Electro-Optical equipment exceeds the current specification of the video world database matrix granularity and the amplitude of physiological oscillation of the manual operator. Discussion: The dataset may be integrated into a simulated training environment which may then be accessed in a non-critical training environment where it is cost effective to use Electro-magnetic position sensing devices. Interchangeability between such systems, is based upon the mathematical analysis available from our website – www.dcs.ex.ac.uk/evw. Conclusion: The Electro-Optical system allows accurate registration of the frame recording position, and playback, however high capital cost may prohibit widespread use for training. Developing mathematical correlation between the two systems, integrates their specific use in different environments.
ELectro-optical, surgery, orthopaedics
128-128
Grange, Simon
964762ac-15ed-4c0b-8193-9f9824fc7cbc
Bunker, Tim
8207049c-95af-4156-8ce1-f10a310f3217
Cooper, Jason
4c533fde-9616-4bf0-9aaa-8c426bde64b2
Waldhausen, Sylvia
5d2a962a-aec0-4bac-97b1-f204d862e16d
Langlotz, Frank
8cf420d8-08e0-40af-911a-94a9b03f1a1c
Nolte, Lutz
8d28d39e-ebaa-4a59-ae2f-6d0e13fe5e89
Grange, Simon
964762ac-15ed-4c0b-8193-9f9824fc7cbc
Bunker, Tim
8207049c-95af-4156-8ce1-f10a310f3217
Cooper, Jason
4c533fde-9616-4bf0-9aaa-8c426bde64b2
Waldhausen, Sylvia
5d2a962a-aec0-4bac-97b1-f204d862e16d
Langlotz, Frank
8cf420d8-08e0-40af-911a-94a9b03f1a1c
Nolte, Lutz
8d28d39e-ebaa-4a59-ae2f-6d0e13fe5e89

Grange, Simon, Bunker, Tim, Cooper, Jason and Waldhausen, Sylvia (1999) Comparing electro-optical and electro-magnetic guidance systems in the preparation of minimal access surgical training environments. Langlotz, Frank and Nolte, Lutz (eds.) Computer Assisted Orthopaedic Surgery 1999, Davos, Switzerland. p. 128 .

Record type: Conference or Workshop Item (Other)

Abstract

Introduction: High quality visual images for virtual environment generation were prepared using two comparative spatial co-ordinate referencing systems, identifying the position of individual frames in the recorded video database. Methodology: A cadaveric shoulder arthroscopy database was recorded and replayed using an ATM Network. An Electro-optical (Optotrak?) spatial reference system is compared with an Electro-magnetic (Flock of Birds?) system, for position tracking of an arthroscope in the virtual environment. Results: 1. Electro–Optical equipment is used safely in the operating theatre environment 2. Electro-Magnetic devices are affected by ferromagnetic environments 3. Electromagnetic devices are inexpensive, and thus more suitable for a training environment 4. It was necessary register the two systems relative to each other using ‘public domain’ algorithms. The precision of the Electro-Optical equipment exceeds the current specification of the video world database matrix granularity and the amplitude of physiological oscillation of the manual operator. Discussion: The dataset may be integrated into a simulated training environment which may then be accessed in a non-critical training environment where it is cost effective to use Electro-magnetic position sensing devices. Interchangeability between such systems, is based upon the mathematical analysis available from our website – www.dcs.ex.ac.uk/evw. Conclusion: The Electro-Optical system allows accurate registration of the frame recording position, and playback, however high capital cost may prohibit widespread use for training. Developing mathematical correlation between the two systems, integrates their specific use in different environments.

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More information

Published date: 1999
Additional Information: Event Dates: March 1999
Venue - Dates: Computer Assisted Orthopaedic Surgery 1999, Davos, Switzerland, 1999-03-01
Keywords: ELectro-optical, surgery, orthopaedics
Organisations: Electronic & Software Systems

Identifiers

Local EPrints ID: 262560
URI: http://eprints.soton.ac.uk/id/eprint/262560
PURE UUID: 9713cf0f-3d35-4c9f-800c-21eaf35bcb07

Catalogue record

Date deposited: 06 Apr 2007
Last modified: 29 Jan 2020 15:50

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