Abstract
| Original language | English |
|---|---|
| Article number | 117007 |
| Pages (from-to) | 1-15 |
| Journal | Journal of Biomedical Optics |
| Volume | 17 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2012 |
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Reducing motion artifacts in photoplethysmograms by using relative sensor motion : phantom study. / Wijshoff, R.W.C.G.R.; Mischi, M.; Veen, J.; Lee, van der, A.M.; Aarts, Ronald.
In: Journal of Biomedical Optics, Vol. 17, No. 11, 117007, 2012, p. 1-15.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Reducing motion artifacts in photoplethysmograms by using relative sensor motion : phantom study
AU - Wijshoff, R.W.C.G.R.
AU - Mischi, M.
AU - Veen, J.
AU - Lee, van der, A.M.
AU - Aarts, Ronald
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
U2 - 10.1117/1.JBO.17.11.117007
DO - 10.1117/1.JBO.17.11.117007
M3 - Article
C2 - 23192359
VL - 17
SP - 1
EP - 15
JO - Journal of Biomedical Optics
JF - Journal of Biomedical Optics
SN - 1083-3668
IS - 11
M1 - 117007
ER -