Open AccessAmbiguity of mapping the relative phase of blood pulsations
Author(s) -
Victor Teplov,
Ervin Nippolainen,
Alexander A. Makarenko,
Rashid Giniatullin,
Alexei A. Kamshilin
Publication year - 2014
Publication title -
biomedical optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.5.003123
Subject(s) - photoplethysmogram , waveform , computer science , phase (matter) , temporal resolution , asynchronous communication , microcirculation , biomedical engineering , artificial intelligence , optics , computer vision , medicine , physics , radiology , telecommunications , radar , filter (signal processing) , quantum mechanics
Blood pulsation imaging (BPI) is a non-invasive optical method based on photoplethysmography (PPG). It is used for the visualization of changes in the spatial distribution of blood in the microvascular bed. BPI specifically allows measurements of the relative phase of blood pulsations and using it we detected a novel type of PPG fast waveforms, which were observable in limited areas with asynchronous regional blood supply. In all subjects studied, these fast waveforms coexisted with traditional slow waveforms of PPG. We are therefore presenting a novel lock-in image processing technique of blood pulsation imaging, which can be used for detailed temporal characterization of peripheral microcirculation.