Biomedical magnetic field measuring apparatus having different t

Details Biomedical magnetic field measuring apparatus having different t Biomedical magnetic field measuring apparatus having different t

1996-09-24

1999-04-06

Kamm, William E.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

600544, 324248, 324244, A61B 505

Patent

active

058910310

ABSTRACT:
The sensitivity in detection in a depth direction of a living body and the overall signal-to-noise ratio of an apparatus are improved, whereby a distribution of current sources in the living body or a plurality of current dipoles can be inferred more accurately than they conventionally are. A pickup coil array is made by combining a plurality of types of pickup coils that are mutually different in at least one of the order of a differential and a base line. The plurality of types of pickup coils are mutually different in, for example, only the order of a differential or only a base line, and are arranged separately at different measurement points or arranged at the same measurement point. Included is a magnetic source inferring means for inferably computing information on magnetic sources in a living body or information on the distribution of magnetic sources on the basis of detection signals provided by the plurality of types of pickup coils. The magnetic source inferring means includes a means for compensating for the influence of magnetic crosstalk among the plurality of types of pickup coils.

REFERENCES:
patent: 5243984 (1993-09-01), Ogura
patent: 5437276 (1995-08-01), Takada
patent: 5444373 (1995-08-01), Johnson
patent: 5451871 (1995-09-01), Igarashi

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