Analysis of biological signals using data from arrays of sensors
US4977896A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | May 26, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/242
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Signals produced by brain activity are measured by each sensor of an array of magnetic and/or electrical sensors external to but proximate to the head (or other portion of the body) of a subject. The measurements obtained simultaneously from all of the sensors are combined in a manner to permit selective measurement of the electrical activity from a specified location within the body, or alternatively, to permit the location in the body producing a particular type of response to be identified. The instantaneous measurement of each sensor is scaled by a weighting coefficient for that sensor, and the products added over all of the sensors. The weighting coefficients are calculated from a mathematical model of the brain that includes information on the shape of the potential source, the extent or type of source activity, the electrical and magnetic properties of the media, and the locations and orientations of the sources and the sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.