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Title: Motion-compensated noncontact imaging photoplethysmography to monitor cardiorespiratory status during exercise
Authors: Sun, Yu
Hu, Sijung
Azorin-Peris, Vicente
Greenwald, Stephen
Chambers, Jonathon
Zhu, Yisheng
Keywords: Photoplethysmography
Single channel independent component analysis
Motion compensation
Blind source separation
Issue Date: 2011
Publisher: © SPIE
Citation: SUN, Y. ... et al., 2011. Motion-compensated noncontact imaging photoplethysmography to monitor cardiorespiratory status during exercise. Journal of Biomedical Optics, 16 (7), DOI: 10.1117/1.3602852.
Abstract: With the advance of computer and photonics technology, imaging photoplethysmography [(PPG), iPPG] can provide comfortable and comprehensive assessment over a wide range of anatomical locations. However, motion artifact is a major drawback in current iPPG systems, particularly in the context of clinical assessment. To overcome this issue, a new artifact-reduction method consisting of planar motion compensation and blind source separation is introduced in this study. The performance of the iPPG system was evaluated through the measurement of cardiac pulse in the hand from 12 subjects before and after 5 min of cycling exercise. Also, a 12-min continuous recording protocol consisting of repeated exercises was taken from a single volunteer. The physiological parameters (i.e., heart rate, respiration rate), derived from the images captured by the iPPG system, exhibit functional characteristics comparable to conventional contact PPG sensors. Continuous recordings from the iPPG system reveal that heart and respiration rates can be successfully tracked with the artifact reduction method even in high-intensity physical exercise situations. The outcome from this study thereby leads to a new avenue for noncontact sensing of vital signs and remote physiological assessment, with clear applications in triage and sports training.
Description: © 2011 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Sponsor: The authors thank the NIHR, UK (Grant No. FPD1 II-FS- 0109-11005) for their financial support.
Version: Published
DOI: 10.1117/1.3602852
URI: https://dspace.lboro.ac.uk/2134/22170
Publisher Link: http://dx.doi.org/10.1117/1.3602852
ISSN: 1083-3668
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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