Motion artifacts in photoplethysmographic signals modeling based on optical and topological properties of skin

Abstract

Photoplethysmography (PPG) is a simple and low-cost optical technique that can be used to detect blood volume changes in the microvascular bed of tissue. It is often used non-invasively to make measurements at the skin surface. It has been widely used in wearable devices, such as smart-watches for fitness tracking and vital sign monitoring. However, motion artifact is a strong interference, preventing accurate estimation of vital signs. Human tissue deformation is one of the main known source of motion artefacts. The aim of this study is to introduce model based on optical and topological properties of skin showing the origin of motion artifacts in PPG signal.