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Classifying Muscle States with One-Dimensional Radio-Frequency Signals from Single Element Ultrasound Transducers

The reliable assessment of muscle states, such as contracted muscles vs. non-contracted muscles or relaxed muscles vs. fatigue muscles, is crucial in many sports and rehabilitation scenarios, such as the assessment of therapeutic measures. The goal of this work was to deploy machine learning (ML) mo...

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Detalles Bibliográficos
Autores principales: Brausch, Lukas, Hewener, Holger, Lukowicz, Paul
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9002976/
https://www.ncbi.nlm.nih.gov/pubmed/35408403
http://dx.doi.org/10.3390/s22072789
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author Brausch, Lukas
Hewener, Holger
Lukowicz, Paul
author_facet Brausch, Lukas
Hewener, Holger
Lukowicz, Paul
author_sort Brausch, Lukas
collection PubMed
description The reliable assessment of muscle states, such as contracted muscles vs. non-contracted muscles or relaxed muscles vs. fatigue muscles, is crucial in many sports and rehabilitation scenarios, such as the assessment of therapeutic measures. The goal of this work was to deploy machine learning (ML) models based on one-dimensional (1-D) sonomyography (SMG) signals to facilitate low-cost and wearable ultrasound devices. One-dimensional SMG is a non-invasive technique using 1-D ultrasound radio-frequency signals to measure muscle states and has the advantage of being able to acquire information from deep soft tissue layers. To mimic real-life scenarios, we did not emphasize the acquisition of particularly distinct signals. The ML models exploited muscle contraction signals of eight volunteers and muscle fatigue signals of 21 volunteers. We evaluated them with different schemes on a variety of data types, such as unprocessed or processed raw signals and found that comparatively simple ML models, such as Support Vector Machines or Logistic Regression, yielded the best performance w.r.t. accuracy and evaluation time. We conclude that our framework for muscle contraction and muscle fatigue classifications is very well-suited to facilitate low-cost and wearable devices based on ML models using 1-D SMG.
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spelling pubmed-90029762022-04-13 Classifying Muscle States with One-Dimensional Radio-Frequency Signals from Single Element Ultrasound Transducers Brausch, Lukas Hewener, Holger Lukowicz, Paul Sensors (Basel) Article The reliable assessment of muscle states, such as contracted muscles vs. non-contracted muscles or relaxed muscles vs. fatigue muscles, is crucial in many sports and rehabilitation scenarios, such as the assessment of therapeutic measures. The goal of this work was to deploy machine learning (ML) models based on one-dimensional (1-D) sonomyography (SMG) signals to facilitate low-cost and wearable ultrasound devices. One-dimensional SMG is a non-invasive technique using 1-D ultrasound radio-frequency signals to measure muscle states and has the advantage of being able to acquire information from deep soft tissue layers. To mimic real-life scenarios, we did not emphasize the acquisition of particularly distinct signals. The ML models exploited muscle contraction signals of eight volunteers and muscle fatigue signals of 21 volunteers. We evaluated them with different schemes on a variety of data types, such as unprocessed or processed raw signals and found that comparatively simple ML models, such as Support Vector Machines or Logistic Regression, yielded the best performance w.r.t. accuracy and evaluation time. We conclude that our framework for muscle contraction and muscle fatigue classifications is very well-suited to facilitate low-cost and wearable devices based on ML models using 1-D SMG. MDPI 2022-04-05 /pmc/articles/PMC9002976/ /pubmed/35408403 http://dx.doi.org/10.3390/s22072789 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Brausch, Lukas
Hewener, Holger
Lukowicz, Paul
Classifying Muscle States with One-Dimensional Radio-Frequency Signals from Single Element Ultrasound Transducers
title Classifying Muscle States with One-Dimensional Radio-Frequency Signals from Single Element Ultrasound Transducers
title_full Classifying Muscle States with One-Dimensional Radio-Frequency Signals from Single Element Ultrasound Transducers
title_fullStr Classifying Muscle States with One-Dimensional Radio-Frequency Signals from Single Element Ultrasound Transducers
title_full_unstemmed Classifying Muscle States with One-Dimensional Radio-Frequency Signals from Single Element Ultrasound Transducers
title_short Classifying Muscle States with One-Dimensional Radio-Frequency Signals from Single Element Ultrasound Transducers
title_sort classifying muscle states with one-dimensional radio-frequency signals from single element ultrasound transducers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9002976/
https://www.ncbi.nlm.nih.gov/pubmed/35408403
http://dx.doi.org/10.3390/s22072789
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