Assessing the stability of pulse waves component in the laser balistocardiography

Abstract

Today, there is a growing need to develop methods for detecting pulse waves (PV) that do not require direct contact with an object. The method of remote photoplethysmography is gaining popularity, in which the receivers of the useful signal are the matrix of a video camera, webcam or smart phone (Imaging PPG). While most of these methods are based on the analysis of changes in the brightness of the image, we investigated the possibility of detecting mechanical displacements of the skin surface associated with the passage of a pulse wave using speckle field analysis. In this paper, we describe the results of using a modified method for analyzing the contrast of laser speckles using the Gauss function for calculating the contrast. Special attention was paid to the choice of a two-dimensional area for averaging contrast patterns and the stability of detected pulse waves in comparison with contact technologies. The results confirm the prospects for further development of the methodology.

Speaker

Maria O. Tsoy
Saratov State University, Saratov, Russia
Russia

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