Motion Artifact Reduction for Wrist-Worn Photoplethysmograph Sensors Based on Different Wavelengths

Long-term heart rate (HR) monitoring by wrist-worn photoplethysmograph (PPG) sensors enables the assessment of health conditions during daily life with high user comfort. However, PPG signals are vulnerable to motion artifacts (MAs), which significantly affect the accuracy of estimated physiological...

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Vydáno v:Sensors (Basel, Switzerland) Ročník 19; číslo 3; s. 673
Hlavní autoři: Zhang, Yifan, Song, Shuang, Vullings, Rik, Biswas, Dwaipayan, Simões-Capela, Neide, van Helleputte, Nick, van Hoof, Chris, Groenendaal, Willemijn
Médium: Journal Article
Jazyk:angličtina
Vydáno: Switzerland MDPI 07.02.2019
MDPI AG
Témata:
continuous wavelet transforms
heart rate
motion artifacts
photoplethysmography
heart rate
motion artifacts
photoplethysmography
continuous wavelet transforms
ISSN:1424-8220, 1424-8220
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Shrnutí:Long-term heart rate (HR) monitoring by wrist-worn photoplethysmograph (PPG) sensors enables the assessment of health conditions during daily life with high user comfort. However, PPG signals are vulnerable to motion artifacts (MAs), which significantly affect the accuracy of estimated physiological parameters such as HR. This paper proposes a novel modular algorithm framework for MA removal based on different wavelengths for wrist-worn PPG sensors. The framework uses a green PPG signal for HR monitoring and an infrared PPG signal as the motion reference. The proposed framework includes four main steps: motion detection, motion removal using continuous wavelet transform, approximate HR estimation and signal reconstruction. The proposed algorithm is evaluated against an electrocardiogram (ECG) in terms of HR error for a dataset of 6 healthy subjects performing 21 types of motion. The proposed MA removal method reduced the average error in HR estimation from 4.3, 3.0 and 3.8 bpm to 0.6, 1.0 and 2.1 bpm in periodic, random, and continuous non-periodic motion situations, respectively.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s19030673