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Frame Registration for Motion Compensation in Imaging Photoplethysmography

Imaging photoplethysmography (iPPG) is an emerging technology used to assess microcirculation and cardiovascular signs by collecting backscattered light from illuminated tissue using optical imaging sensors. An engineering approach is used to evaluate whether a silicone cast of a human palm might be...

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Detalles Bibliográficos
Autores principales: Iakovlev, Dmitry, Hu, Sijung, Dwyer, Vincent
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308702/
https://www.ncbi.nlm.nih.gov/pubmed/30544812
http://dx.doi.org/10.3390/s18124340
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author Iakovlev, Dmitry
Hu, Sijung
Dwyer, Vincent
author_facet Iakovlev, Dmitry
Hu, Sijung
Dwyer, Vincent
author_sort Iakovlev, Dmitry
collection PubMed
description Imaging photoplethysmography (iPPG) is an emerging technology used to assess microcirculation and cardiovascular signs by collecting backscattered light from illuminated tissue using optical imaging sensors. An engineering approach is used to evaluate whether a silicone cast of a human palm might be effectively utilized to predict the results of image registration schemes for motion compensation prior to their application on live human tissue. This allows us to establish a performance baseline for each of the algorithms and to isolate performance and noise fluctuations due to the induced motion from the temporally changing physiological signs. A multi-stage evaluation model is developed to qualitatively assess the influence of the region of interest (ROI), system resolution and distance, reference frame selection, and signal normalization on extracted iPPG waveforms from live tissue. We conclude that the application of image registration is able to deliver up to 75% signal-to-noise (SNR) improvement (4.75 to 8.34) over an uncompensated iPPG signal by employing an intensity-based algorithm with a moving reference frame.
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spelling pubmed-63087022019-01-04 Frame Registration for Motion Compensation in Imaging Photoplethysmography Iakovlev, Dmitry Hu, Sijung Dwyer, Vincent Sensors (Basel) Article Imaging photoplethysmography (iPPG) is an emerging technology used to assess microcirculation and cardiovascular signs by collecting backscattered light from illuminated tissue using optical imaging sensors. An engineering approach is used to evaluate whether a silicone cast of a human palm might be effectively utilized to predict the results of image registration schemes for motion compensation prior to their application on live human tissue. This allows us to establish a performance baseline for each of the algorithms and to isolate performance and noise fluctuations due to the induced motion from the temporally changing physiological signs. A multi-stage evaluation model is developed to qualitatively assess the influence of the region of interest (ROI), system resolution and distance, reference frame selection, and signal normalization on extracted iPPG waveforms from live tissue. We conclude that the application of image registration is able to deliver up to 75% signal-to-noise (SNR) improvement (4.75 to 8.34) over an uncompensated iPPG signal by employing an intensity-based algorithm with a moving reference frame. MDPI 2018-12-08 /pmc/articles/PMC6308702/ /pubmed/30544812 http://dx.doi.org/10.3390/s18124340 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Iakovlev, Dmitry
Hu, Sijung
Dwyer, Vincent
Frame Registration for Motion Compensation in Imaging Photoplethysmography
title Frame Registration for Motion Compensation in Imaging Photoplethysmography
title_full Frame Registration for Motion Compensation in Imaging Photoplethysmography
title_fullStr Frame Registration for Motion Compensation in Imaging Photoplethysmography
title_full_unstemmed Frame Registration for Motion Compensation in Imaging Photoplethysmography
title_short Frame Registration for Motion Compensation in Imaging Photoplethysmography
title_sort frame registration for motion compensation in imaging photoplethysmography
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308702/
https://www.ncbi.nlm.nih.gov/pubmed/30544812
http://dx.doi.org/10.3390/s18124340
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