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2 November 2011 Optimal wavelength selection for noncontact reflection photoplethysmography
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In this work, we obtain backscattered signals from human forehead for wavelengths from 380 to 980 nm. The results reveal bands with strong pulsatile signals that carry useful information. We describe those bands as the most suitable wavelengths in the visible and NIR regions from which heart and respiratory rate parameters can be derived using long distance non-contact reflection photoplethysmography analysis. The latter results show the feasibility of a novel technique for remotely detection of vital signs in humans. This technique, which may include morphological analysis or maps of tissue oxygenation, is a further step to real non-invasive remote monitoring of patients.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Luis F. Corral Martinez, Gonzalo Paez, and Marija Strojnik "Optimal wavelength selection for noncontact reflection photoplethysmography", Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 801191 (2 November 2011);


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