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Sparse Coding of Cardiac Signals for Automated Component Selection after Blind Source Separation
Institute of Biomedical Engineering, TU Dresden.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.ORCID iD: 0000-0002-6032-6155
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.ORCID iD: 0000-0003-0069-640X
Institute of Biomedical Engineering, TU Dresden.
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Number of Authors: 62016 (English)In: Computing in cardiology, ISSN 2325-8861, E-ISSN 2325-887X, Vol. 43, p. 785-788, article id 7868860Article in journal (Refereed) Published
Abstract [en]

Wearable sensor technology like textile electrodes provides novel ambulatory health monitoring solutions but most often goes along with low signal quality. Blind Source Separation (BSS) is capable of extracting the Electrocardiogram (ECG) out of heavily distorted multichannel recordings. However, permutation indeterminacy has to be solved, i.e. the automated selection of the desired BSS output. Accordingly, we exploit the sparsity of the ECG modeled as a spike train of successive heartbeats. A binary code derived from a two-item dictionary fpeak, no peakg and physiological a-priori information temporally represents every BSS output component. The (best) ECG component is automatically selected based on a modified Hamming distance comparing the components’ code with the expected code behavior. Non-standard ECG recordings from ten healthy subjects performing common motions while wearing a sensor garment were subsequently processed in 10 s segments with spatio-temporal BSS. Our sparsity-based selection RCODE achieved 98.1% heart beat detection accuracy (ACC) by selecting a single component each after BSS. Traditional component selection based on higher-order statistics (e.g. skewness) achieved only 67.6% ACC.

Place, publisher, year, edition, pages
2016. Vol. 43, p. 785-788, article id 7868860
National Category
Computer Sciences
Research subject
Dependable Communication and Computation Systems
Identifiers
URN: urn:nbn:se:ltu:diva-30791ISI: 000405710400197Local ID: 4bd094ff-5500-4fe0-8625-c36cf20b2916OAI: oai:DiVA.org:ltu-30791DiVA, id: diva2:1004020
Conference
43rd Computing in Cardiology Conference (CinC), Vancouver, 11-14 September 2016
Note

2017-03-27 (andbra);Konferensartikel i tidskrift

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-28Bibliographically approved

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http://www.cinc2016.org/images/ProgramWithAbstracts.pdf

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Kleyko, DenisOsipov, Evgeny

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