Whole-cortex helmet-type SQUID MEG systems have been in operation in a number of laboratories since 1992, e.g. . 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.
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- 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
- 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
- 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