Multi-sensor magnetoencephalography with atomic magnetometers.
The authors have detected magnetic fields from the human brain with two independent, simultaneously operating rubidium spin-exchange-relaxation-free magnetometers. Evoked responses from auditory stimulation were recorded from multiple subjects with two multi-channel magnetometers located on opposite sides of the head. Signal processing techniques enabled by multi-channel measurements were used to improve signal quality. This is the first demonstration of multi-sensor atomic magnetometer magnetoencephalography and provides a framework for developing a non-cryogenic, whole-head magnetoencephalography array for source localization.
Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185-1082, USA. cort.johnson@alum.mit.edu
Cort N
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Johnson
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PD
Schwindt
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Weisend
D004867:Equipment Design; D005072:Evoked Potentials, Auditory; D006801:Humans; D015225:Magnetoencephalography / Q000295:instrumentation*