2134/22188 Ping Shi Ping Shi Vicente Azorin-Peris Vicente Azorin-Peris Angelos S. Echiadis Angelos S. Echiadis Jia Zheng Jia Zheng Yisheng Zhu Yisheng Zhu Peck-Yeng (Sharon) Cheang Peck-Yeng Cheang Sijung Hu Sijung Hu Non-contact reflection photoplethysmography towards effective human physiological monitoring Loughborough University 2016 Non-contact reflection photoplethysmography (NRPPG) Sensor placement Bland-Altman plot Pearson’s correlation Cardio-physiological monitoring Mechanical Engineering not elsewhere classified Artificial Intelligence and Image Processing 2016-08-04 08:33:23 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/Non-contact_reflection_photoplethysmography_towards_effective_human_physiological_monitoring/9562148 A non-contact reflection photoplethysmography (NRPPG) with its engineering model was created to access human physiological information. The NRPPG engineering setup with a vertical cavity surface emitting laser (VCSEL) as a light source and a high-speed PiN photodiode as a photodetector was configured based upon the principles of light-tissue interaction and Beer-Lambert’s law. In this paper, we present three aspects of the NRPPG performance: (1) photonics engineering work to capture photoplethysmographic signals with a non-contact manner in an optimal setup of the NRPPG; (2) a 5-minute protocol with 22 participants to determine a good agreement between NRPPG and contact photoplethysmography (CPPG) by means of Bland-Altman statistical analysis and Pearson’s correlation coefficient; and (3) a physiological experiment designed for cardiac-physiological monitoring utilizing NRPPG. The experimental results suggest that clean PPG signal can be obtained between 30-110 mm. The outcome from agreement study indicates that the performance of NRPPG is compatible with CPPG. The NRPPG technique has great potential in cardiac-physiological assessment in a required clinical circumstance.