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10 November 2022 Photoplethysmographic imaging and analysis of pulsatile pressure wave in palmar artery at 10 wavelengths
Jiahong Jin, Jun Qing Lu, Cheng Chen, Ruihai Zhou, Xin-Hua Hu
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Journal of Biomedical Optics, Vol. 27, Issue 11, 116004 (November 2022). https://doi.org/10.1117/1.JBO.27.11.116004
Abstract

Significance

As a noncontact method, imaging photoplethysmography (iPPG) may provide a powerful tool to measure pulsatile pressure wave (PPW) in superficial arteries and extract biomarkers for monitoring of artery wall stiffness.

Aim

We intend to develop a approach for extraction of the very weak cardiac component from iPPG data by identifying locations of strong PPW signals with optimized illumination wavelength and determining pulse wave velocity (PWV).

Approach

Monochromatic in vivo iPPG datasets have been acquired from left hands to investigate various algorithms for retrieval of PPW signals, distribution maps and waveforms, and their dependence on arterial location and wavelength.

Results

A robust algorithm of pixelated independent component analysis (pICA) has been developed and combined with spatiotemporal filtering to retrieve PPW signals. Spatial distributions of PPW signals have been mapped in 10 wavelength bands from 445 to 940 nm and waveforms were analyzed at multiple locations near the palmar artery tree. At the wavelength of 850 nm selected for timing analysis, we determined PWV values from 12 healthy volunteers in a range of 0.5 to 5.8 m/s across the hand region from wrist to midpalm and fingertip.

Conclusions

These results demonstrate the potentials of the iPPG method based on pICA algorithm for translation into a monitoring tool to characterize wall stiffness of superficial artery by rapid and noncontact measurement of PWV and other biomarkers within 10 s.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 International License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Jiahong Jin, Jun Qing Lu, Cheng Chen, Ruihai Zhou, and Xin-Hua Hu "Photoplethysmographic imaging and analysis of pulsatile pressure wave in palmar artery at 10 wavelengths," Journal of Biomedical Optics 27(11), 116004 (10 November 2022). https://doi.org/10.1117/1.JBO.27.11.116004
Received: 23 May 2022; Accepted: 18 October 2022; Published: 10 November 2022
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KEYWORDS
Arteries
Signal to noise ratio
Photoplethysmography
Tissues
Algorithm development
Skin
Independent component analysis
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