Method and apparatus for reducing contamination of an electrical signal
US7286871B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2001 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Jun 26, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/4094
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The method of reducing contamination of electrical signals recorded in the presence of repeated interference contamination comprises obtaining an electrical signal recorded in the presence of a contaminating signal, and detecting a timing signal that occurs at a fixed time point during the electrical signal relative to the onset of the contaminating signal. The electrical signal is digitized, wherein the digitizing begins with the timing signal. A plurality of digitized electrical signals is analyzed, wherein the electrical signals are synchronized with respect to the timing signal, to obtain an estimated contaminating signal that is subtracted from the digitized electrical signal. This method can be used with electrophysiological signals, such as EEG, ECG, EMG and galvanic skin response, and for elimination of noise associated with concurrently used methods such as MRI. The method of noise reduction is applicable to recordings of other electrical signals, including audio recordings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.