title: Non-contact measurement of oxygen saturation with an RGB camera.
abstract: A novel method (Sophia) is presented to track oxygen saturation changes in a controlled environment using an RGB camera placed approximately 1.5 m away from the subject. The method is evaluated on five healthy volunteers (Fitzpatrick skin phenotypes II, III, and IV) whose oxygen saturations were varied between 80% and 100% in a purpose-built chamber over 40 minutes each. The method carefully selects regions of interest (ROI) in the camera image by calculating signal-to-noise ratios for each ROI. This allows it to track changes in oxygen saturation accurately with respect to a conventional pulse oximeter (median coefficient of determination, 0.85).
authors.affiliation: Insitute of Biomedical Engineering, University of Oxford, UK.
authors.forename: Alessandro R
authors.initials: AR
authors.lastname: Guazzi
authors.affiliation: Insitute of Biomedical Engineering, University of Oxford, UK.
authors.forename: Mauricio
authors.initials: M
authors.lastname: Villarroel
authors.affiliation: Insitute of Biomedical Engineering, University of Oxford, UK.
authors.forename: João
authors.initials: J
authors.lastname: Jorge
authors.affiliation: Insitute of Biomedical Engineering, University of Oxford, UK.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Daly
authors.affiliation: Department of Physiology Anatomy and Genetics, University of Oxford, UK.
authors.forename: Matthew C
authors.initials: MC
authors.lastname: Frise
authors.affiliation: Department of Physiology Anatomy and Genetics, University of Oxford, UK.
authors.forename: Peter A
authors.initials: PA
authors.lastname: Robbins
authors.affiliation: Insitute of Biomedical Engineering, University of Oxford, UK.
authors.forename: Lionel
authors.initials: L
authors.lastname: Tarassenko
keywords: (170.0110) Imaging systems; (170.0170) Medical optics and biotechnology; (170.1460) Blood gas monitoring; (170.1470) Blood or tissue constituent monitoring; (170.3660) Light propagation in tissues; (280.0280) Remote sensing and sensors