Electricity: measuring and testing – Magnetic – Magnetic field detection devices
Patent
1991-03-27
1992-12-08
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetic field detection devices
36441301, 36441313, 36457102, 1286531, G01R 3302, A61B 505
Patent
active
051701197
ABSTRACT:
A process and an apparatus for measuring the biocurrent distribution call for initially assuming a number of multiple currents which is more than the number of isolated currents possibly existing in a living body and calculating the virtual magnetic field created by the assumed currents at actual measuring points. The estimated location and current vectors of said assumed currents are consecutively changed to decrease the difference between said virtual and actual magnetic fields so that the estimated location and current vectors of the assumed currents having the number corresponding to the true isolated currents substantially approximate the true values and the estimates of the other assumed currents approximate zero. This enables the biocurrent distribution to be exactly determined even when the number of isolated currents is not preliminarily known.
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Haneishi Hideaki
Honda Toshio
Ohyama Nagaaki
Sekihara Kensuke
Edmonds Warren S.
Hitachi , Ltd.
Strecker Gerard R.
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