Biologic magnetometer for determining an electric current distribution in a living organ
US5495849A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1994 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | Jun 30, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/1269
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method/apparatus of the present invention, a plurality or pickup coils are employed at a plurality of detection points so as to measure magnetic field intensities induced from electric current generated on living organ: the detection points are spatially interpolated/extrapolated; equations to determine relations of a hypothetically located current to the magnetic field intensities at the detection points and the interpolated detection points are established; the magnetic field intensities are measured with the pickup coils; magnetic field intensities are estimated at the interpolated/extrapolated detection points from the magnetic field intensities measured by the pickup coils; and the hypothetically located electric current is calculated by applying said magnetic field intensities at the detection points and said interpolated/extrapolated detection points to said equation. Thus, the electric current value is estimated. The calculation is preferably carried out by a SVD method, where the hypothetically located current is placed at plural current source positions. Matrix constants in the SVD calculation is determined in advance to allow a quick calculation. The interpolated/ex…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.