Biomag 96 pp 138-141 | Cite as

143 Channel Whole-Cortex MEG System

  • J. Vrba
  • V. Angus
  • K. Betts
  • M. B. Burbank
  • T. Cheung
  • A. A. Fife
  • G. Haid
  • P. R. Kubik
  • S. Lee
  • W. Ludwig
  • J. Mccubbin
  • J. Mckay
  • D. Mckenzie
  • S. E. Robinson
  • M. Smith
  • P. Spear
  • B. Taylor
  • M. Tillotson
  • D. Cheyne
  • H. Weinberg

Abstract

Whole-cortex helmet-type SQUID MEG systems have been in operation in a number of laboratories since 1992, e.g. [1]. Recently, a whole-cortex integrated MEG/EEG system consisting of 143 MEG sensor Channels, 40 EEG Channels, 8 A/D and D/A Channels and 8 logical Channels was developed and operated in an unshielded environment and, more recently, in a shielded room. This paper presents the resulting noise Performance and several examples of unshielded recordings of spontaneous and evoked brain activity with response to DC.

Keywords

Attenuation Helium 

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References

  1. [1]
    Nakasato, N., Fujiwara, S., Yoshimoto, T., Fujita, S., Matani, A., Izuma, H., Tamura, I. The whole head magnetoencephalogram: localization of bilateral sources for unilaterally stimulated auditory evoked response, Electroencephalogr. Clin. Neurophysiol, 1993, 87: S26.CrossRefGoogle Scholar
  2. [2]
    Vrba, J., Haid, G., Lee, S., Taylor, B., Fife, A.A., Kubik, P.R., McCubbin, J. and Burbank, M.B. Biomagne tometers for unshielded and well shielded environments, Clin. Phys. Meas., 1991, 12 B: 81–86.Google Scholar
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    Weinberg, H., Gaetz, M., Jantzen, K., Cheyne, D., and Deecke, L. Comparison of MEG and EEG for assess-ment of traumatic brain injury, These proceedings, 1996Google Scholar
  4. Cheyne, D., Roberts, L.E., Gaetz, W., Bosnyak, D., Weinberg, H., Johnson, B., Nahmias, C. and Deecke, L. EEG and MEG source analysis of somatosen-sory evoked responses to mechanical Stimulation of the fingers, These proceedings, 1996.Google Scholar

Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • J. Vrba
    • 1
  • V. Angus
    • 1
  • K. Betts
    • 1
  • M. B. Burbank
    • 1
  • T. Cheung
    • 1
  • A. A. Fife
    • 1
  • G. Haid
    • 1
  • P. R. Kubik
    • 1
  • S. Lee
    • 1
  • W. Ludwig
    • 1
  • J. Mccubbin
    • 1
  • J. Mckay
    • 1
  • D. Mckenzie
    • 1
  • S. E. Robinson
    • 1
  • M. Smith
    • 1
  • P. Spear
    • 1
  • B. Taylor
    • 1
  • M. Tillotson
    • 1
  • D. Cheyne
    • 1
    • 2
  • H. Weinberg
    • 2
  1. 1.CTF Systems Inc.Port CoquitlamCanada
  2. 2.Simon Fraser University, Brain Behaviour LaboratoryBurnabyCanada

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