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- W4309593027 abstract "Camera-based blood oxygen saturation (SpO 2 ) monitoring allows reliable measurements without touching the skin and is therefore very attractive when there is a risk of cross-infection, in case of fragile skin, and/or to improve the clinical workflow. Despite promising results, productization of the technology is hampered by the unavailability of adequate hardware, especially a camera, which can capture the optimal wavelengths for SpO 2 measurements in the red near-infrared region. A regular color (RGB) camera is attractive because of its availability, but also poses several risks and challenges which affect the accuracy of the measurement. To mitigate the most important risks, we propose to add low-cost commercial off-the-shelf (COTS) components to the setup. We executed two studies with this setup: one at a hypoxia lab with SpO 2 values in the range 70 − 100% with the purpose to determine the calibration model, and the other study on volunteers to investigate the accuracy for different spot-check scenarios. The proposed processing pipeline includes face tracking and a robust method to estimate the ratio of relative amplitudes of the photoplethysmographic waveforms. Results show that the error is smaller than 4 percent points for realistic screening scenarios where the subject is seated, either with or without head support and/or ambient light." @default.
- W4309593027 created "2022-11-28" @default.
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- W4309593027 date "2022-12-01" @default.
- W4309593027 modified "2023-10-18" @default.
- W4309593027 title "Contactless SpO<sub>2</sub> with an RGB camera: experimental proof of calibrated SpO<sub>2</sub>" @default.
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- W4309593027 doi "https://doi.org/10.1364/boe.471332" @default.
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