Apparatus for measuring brain activity

Details Apparatus for measuring brain activity Apparatus for measuring brain activity

1995-06-01

1996-10-22

Sykes, Angela D.

Surgery

Truss

Pad

128630, 128664, 128665, A61B 500

Patent

active

055666736

ABSTRACT:
In a brain activity measuring apparatus, the reflected light from the brain surface is conducted by way of an objective lens and focusing lens and split into two beams by a beam splitter. The light beams are conducted through respective band-pass filters having different transmission wavelengths, and received by CCD cameras in which images are formed from the filtered light beams. The CCD cameras produce signals of the images, and a differential amplifier subtracts one image signal from the other thereby to remove a background noise component. The apparatus is free from noises caused by mechanical vibration, and the resulting differential signal exhibits the brain activity accurately.

REFERENCES:
patent: 4953968 (1990-09-01), Sherwin et al.
patent: 5052401 (1991-10-01), Sherwin
patent: 5198977 (1993-03-01), Salb
patent: 5438989 (1995-08-01), Hochman et al.

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