Journal Article

PreJuSER-30394

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Adaptive frequency dependent gradiometer applied to magnetocardiography

Bick, M. ; Panaitov, G.FZJ* ; Schiek, M.FZJ* ; Zhang, Y.FZJ* ; Krause, H.-J.FZJ*

2003
IEEE New York, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/2078  doi:10.1109/TASC.2003.813854

Abstract: In the case of magnetocardiography (MCG), gradiometry is a commonly used method to reduce environmental noise. Here, the balance of the gradiometer is one of the main parameters determining the achievable noise reduction. In earlier work, we reported the use of frequency dependent gradiometer coefficients to effectively balance a gradiometer consisting of signal and reference sensors. In this work, the advantages of adaptive determination of these coefficients during a measurement without perturbing the MCG signal are investigated. MCG measurements were recorded with first and second order high temperature SQUID gradiometers inside and outside magnetic shielding. It will be shown that the heart signal is not distorted by applying our software noise reduction technique. Furthermore, by recalculation of gradiometer coefficients during the MCG measurement, an improved signal-to-noise ratio is achieved. The optimum repetition time for coefficient recalculation is determined.

Keyword(s): J ; adaptive noise cancellation (auto) ; gradiometry (auto) ; magnetocardiography (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Bio- und Chemosensoren (ISG-2)

Research Program(s):

1. Materialien, Prozesse und Bauelemente für die Mikro- und Nanoelektronik (I01)

Appears in the scientific report 2003
Notes: This version is available at the following Publisher URL: http://ieeexplore.ieee.org/Xplore/dynhome.jsp

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