Understanding interaction light-biological surfaces: self-calibrated biosensor for measuring multiple physiological parameters

Michal Katan; Hamootal Duadi; Dror Fixler

doi:10.1117/12.3027359

20 June 2024 Understanding interaction light-biological surfaces: self-calibrated biosensor for measuring multiple physiological parameters

Michal Katan, Hamootal Duadi, Dror Fixler

Author Affiliations +

Proceedings Volume 13006, Biomedical Spectroscopy, Microscopy, and Imaging III; 130060T (2024) https://doi.org/10.1117/12.3027359
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Traditional methods for measuring blood oxygen use multiple wavelengths, which produces an In the biomedical field, the reemitted light intensity measured from the tissue depends on both scattering and absorption. In order to separate these variables, we use a physical phenomenon discovered in our lab, called the iso-path length (IPL) point. The IPL point is a specific angle around a cylindrical media, where the light intensity is not affected by the scattering and can serve for self-calibration. For a practical use of this concept, we designed an optic biosensor for measuring physiological parameters such as heart rate, oxygen saturation and respiratory rate, in both ordinary and extreme conditions in a hypoxic chamber.

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Michal Katan, Hamootal Duadi, and Dror Fixler "Understanding interaction light-biological surfaces: self-calibrated biosensor for measuring multiple physiological parameters", Proc. SPIE 13006, Biomedical Spectroscopy, Microscopy, and Imaging III, 130060T (20 June 2024); https://doi.org/10.1117/12.3027359

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KEYWORDS

Biosensors

Calibration

Light scattering

Oxygen

Tissues

Natural surfaces

Absorption

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