Influence of Polarization Filtration on the Information Readout from Pulsating Blood Vessels

Overview

Journal Biomed Opt Express

Specialty Radiology

Date 2016 Jul 23

PMID 27446683

Citations 16

Authors

Igor S Sidorov

Maxim A Volynsky

Alexei A Kamshilin

Affiliations

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Abstract

Imaging photoplethysmography (IPPG) is a recently developed technique for noncontact assessment of cardiovascular function. However, its wide use is limited by low signal-to-noise ratio due to motion artifacts. The aim of this work is to estimate the polarization-filtration impact on discriminating artifacts in IPPG measurements. Experiments were carried out in-vivo by almost simultaneous illumination of subject's palm with polarized and non-polarized light during video recording of 41 subjects. It was found that the light-polarization filtration efficiently reduces motion artifacts compared to the non-polarized illumination while the pulsation amplitude measured at the heartbeat frequency remains unaffected. The polarization filtration improves reliability of IPPG system in non-contact monitoring of subject's heart rate and its variability.

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