Method for adjusting interference signal space in biomagnetic field measurements
US9642554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2011 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Apr 16, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/035
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention introduces a method for adjusting interference signal estimates provided by multichannel biomagnetic field measurements. A so-called Signal Space Separation method (SSS) is applied in the calculatory analysis of the measurement signals, providing for the division of the sources causing the fields in objects of interest and external interferences. When the signal basis representing the interferences has been estimated, this interference signal estimate is adjusted by measuring the fields without the object to be measured and without changing the sensor assembly. Interference components obtained in this manner are analyzed in such a way as to include only the most significant interference components. An adjusted interference subspace is formed, by means of which signal processing and the analysis of the useful signals can be continued.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.