Low noise magnetoencephalogram system and method

Details Low noise magnetoencephalogram system and method Low noise magnetoencephalogram system and method

1989-11-14

1991-06-04

Smith, Ruth S.

Surgery

Truss

Pad

128901, 324248, 324260, A61B 505

Patent

active

050205382

ABSTRACT:
A magnetoencaphalogram (MEG) detects the neuromagnetic brain signals of a subject by bringing a set of magnetic sensors, preferably SQUIDs (superconducting quantum interference device), close to the scalp of the subject. The adverse effect of environmental magnetic noise is reduced by using a second set of magnetic sensors which are placed near the subject. The system includes a bandpass filter, to divide the signals from the various sensors into predetermined frequency bands, and a computer to provide a least squares noise component estimate of the noise from each brain wave sensor and to calculate therefrom a filtered brain wave signal having reduced noise.

REFERENCES:
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patent: 4324255 (1982-04-01), Barach et al.
patent: 4386318 (1983-05-01), Burbank et al.
patent: 4389612 (1983-06-01), Simmonds et al.
patent: 4613817 (1986-09-01), Hoenig
patent: 4675606 (1987-06-01), Ganguly

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