A procedure for denoising dual-axis swallowing accelerometry signals

Physiological Measurement
Ervin SejdićTom Chau

Abstract

Dual-axis swallowing accelerometry is an emerging tool for the assessment of dysphagia (swallowing difficulties). These signals however can be very noisy as a result of physiological and motion artifacts. In this note, we propose a novel scheme for denoising those signals, i.e. a computationally efficient search for the optimal denoising threshold within a reduced wavelet subspace. To determine a viable subspace, the algorithm relies on the minimum value of the estimated upper bound for the reconstruction error. A numerical analysis of the proposed scheme using synthetic test signals demonstrated that the proposed scheme is computationally more efficient than minimum noiseless description length (MNDL)-based denoising. It also yields smaller reconstruction errors than MNDL, SURE and Donoho denoising methods. When applied to dual-axis swallowing accelerometry signals, the proposed scheme exhibits improved performance for dry, wet and wet chin tuck swallows. These results are important for the further development of medical devices based on dual-axis swallowing accelerometry signals.

References

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Citations

Nov 17, 2011·Biomedical Engineering Online·Mohammad S NikjooTom Chau
Jun 12, 2012·Journal of Neuroengineering and Rehabilitation·Celeste MereyTom Chau
Oct 28, 2010·BMC Research Notes·Ervin SejdićTom Chau
Nov 3, 2010·Computers in Biology and Medicine·Ervin SejdićTom Chau
Aug 17, 2010·Computer Methods and Programs in Biomedicine·Ervin SejdićTom Chau
Dec 3, 2015·Nature Reviews. Gastroenterology & Hepatology·Nathalie Rommel, Shaheen Hamdy
May 15, 2015·IEEE Transactions on Bio-medical Engineering·Joshua M DudikErvin Sejdić
Jul 28, 2015·IEEE Transactions on Human-machine Systems·Joshua M DudikErvin Sejdić
Jun 14, 2016·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Faezeh MovahediErvin Sejdic
May 19, 2010·Physiological Measurement·D C B ZorattoC M Steele
Jan 24, 2016·Journal of Neuroengineering and Rehabilitation·Joshua M DudikErvin Sejdić
Jul 12, 2020·American Journal of Speech-language Pathology·James L Coyle, Ervin Sejdić
Jun 2, 2018·Biomedical Engineering Online·Joshua M DudikErvin Sejdić
Jan 13, 2015·Biomedical Engineering Online·Joshua M DudikErvin Sejdić

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