WO2002013689A3 - Method and apparatus for reducing contamination of an electrical signal - Google Patents

Method and apparatus for reducing contamination of an electrical signal Download PDF

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Publication number
WO2002013689A3
WO2002013689A3 PCT/US2001/025480 US0125480W WO0213689A3 WO 2002013689 A3 WO2002013689 A3 WO 2002013689A3 US 0125480 W US0125480 W US 0125480W WO 0213689 A3 WO0213689 A3 WO 0213689A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
electrical
electrical signal
electrical signals
digitized
Prior art date
Application number
PCT/US2001/025480
Other languages
French (fr)
Other versions
WO2002013689A2 (en
Inventor
Mark S Cohen
Original Assignee
Univ California
Mark S Cohen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ California, Mark S Cohen filed Critical Univ California
Priority to JP2002518841A priority Critical patent/JP2004507293A/en
Priority to AU2001283371A priority patent/AU2001283371A1/en
Priority to EP01962172A priority patent/EP1355571A2/en
Priority to CA002418478A priority patent/CA2418478A1/en
Priority to US10/344,776 priority patent/US7286871B2/en
Publication of WO2002013689A2 publication Critical patent/WO2002013689A2/en
Publication of WO2002013689A3 publication Critical patent/WO2002013689A3/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/24Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30Input circuits therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/24Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316Modalities, i.e. specific diagnostic methods
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/40Detecting, measuring or recording for evaluating the nervous system
    • A61B5/4076Diagnosing or monitoring particular conditions of the nervous system
    • A61B5/4094Diagnosing or monitoring seizure diseases, e.g. epilepsy

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.
PCT/US2001/025480 2000-08-15 2001-08-15 Method and apparatus for reducing contamination of an electrical signal WO2002013689A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2002518841A JP2004507293A (en) 2000-08-15 2001-08-15 Method and apparatus for reducing contamination of electrical signals
AU2001283371A AU2001283371A1 (en) 2000-08-15 2001-08-15 Method and apparatus for reducing contamination of an electrical signal
EP01962172A EP1355571A2 (en) 2000-08-15 2001-08-15 Method and apparatus for reducing contamination of an electrical signal
CA002418478A CA2418478A1 (en) 2000-08-15 2001-08-15 Method and apparatus for reducing contamination of an electrical signal
US10/344,776 US7286871B2 (en) 2000-08-15 2001-08-15 Method and apparatus for reducing contamination of an electrical signal

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US22538900P 2000-08-15 2000-08-15
US60/225,389 2000-08-15
US26733701P 2001-02-07 2001-02-07
US60/267,337 2001-02-07

Publications (2)

Publication Number Publication Date
WO2002013689A2 WO2002013689A2 (en) 2002-02-21
WO2002013689A3 true WO2002013689A3 (en) 2003-08-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/025480 WO2002013689A2 (en) 2000-08-15 2001-08-15 Method and apparatus for reducing contamination of an electrical signal

Country Status (6)

Country Link
US (1) US7286871B2 (en)
EP (1) EP1355571A2 (en)
JP (1) JP2004507293A (en)
AU (1) AU2001283371A1 (en)
CA (1) CA2418478A1 (en)
WO (1) WO2002013689A2 (en)

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