Reducing motion artifacts in photoplethysmograms by using relative sensor motion: Phantom study
Open accessAbstract
Currently, photoplethysmograms (PPGs) are mostly used to determine a patient's blood oxygenation and pulse rate. However, PPG morphology conveys more information about the patient's cardiovascular status. Extracting this information requires measuring clean PPG waveforms that are free of artifacts. PPGs are highly susceptible to motion, which can distort the PPG-derived data. Part of the motion artifacts are considered to result from sensor-tissue motion and sensor deformation. It is hypothesized that these motion artifacts correlate with movement of the sensor with respect to the skin. This hypothesis has been proven true in a laboratory setup. In vitro PPGs have been measured in a skin perfusion phantom that is illuminated by a laser diode. Optical motion artifacts are generated in the PPG by translating the laser diode with respect to the PPG photodiode. The optical motion artifacts have been reduced significantly in vitro, by using a normalized least-mean-square algorithm with only a single coefficient that uses the laser's displacement as a reference for the motion artifacts. Laser displacement has been measured accurately via self-mixing interferometry by a compact laser diode with a ball lens integrated into the package, which can be easily integrated into a commercial sensor.
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Many photodetectors are subject to creating artifacts from sensor-tissue motion and sensor deformation changes.
“For example, many of the photodetectors are subject to creating artifacts from sensor-tissue motion and sensor deformation changes [160].”
From Sources of inaccuracy in photoplethysmography for continuous cardiovascular monitoring (2021) · cites this paper as [160]
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- Authors
- Wijshoff, R. W. C. G. R., Mischi, M., Veen, J., & Van Der Lee, A. M.
- Affiliations
- Eindhoven University of Technology (NL)
- Philips (Netherlands) (NL)
- Philips Research
- Venue
- Journal of Biomedical Optics
- Publisher
- SPIE-Intl Soc Optical Eng
- Published
- 2012-11-29
- Volume
- 17
- Issue
- 11
- Pages
- 1-15
- ISSN
- 1083-3668 (ISSN-L)
- 1560-2281
- OpenAlex
- W2141505181
- Cited by
- 40
- References
- 51
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 5 · 2017: 5 · 2016: 6 · 2015: 2 · 2014: 2 · 2013: 3
- FWCI
- 1.28
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Biomedical Optics (publishedVersion)
- PubMed (publishedVersion)
- TU/e Research Portal (submittedVersion)
- TU/e Research Portal (submittedVersion, other-oa)
- Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
- Funders
- IOP Photonic Devices (IPD083359)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
- Keywords
- photoplethysmography, motion artifacts, laser displacement measurement, self-mixing interferometry, pulse rate monitoring, blood oxygenation
- MeSH terms
- Algorithms, Humans, Interferometry, Motion, Artifacts, Photoplethysmography, Phantoms, Imaging, Lasers, Semiconductor, Optical Phenomena, Signal-To-Noise Ratio
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