Analysis of multi-channel measurement data using orthogonal virtual channels
US8838225B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2007 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Jul 27, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2218/22
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention introduces a method for processing multichannel measurement data achieved especially in MEG and EEG measurements. The method uses a signal space separation (SSS) method and the orthogonality of lead fields in order to calculate linear transformation from physical measurement channels to virtual channels. The geometry related to the measurement arrangement is dissipated and the number of virtual channels is clearly lower than the number of physical sensors. The concept of total information can be applied for such transformed measurement data due to orthogonality. The method offers simplified post-processing of the biomagnetic data, such as for source modelling. The total information can also be interpreted as a robust quantity describing the physiological state of a patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.