{ "cells": [ { "cell_type": "markdown", "metadata": { "id": "97Ad8yROpHV8" }, "source": [ "# Signal quality assessment\n", "In this tutorial we will assess the quality of MIMIC waveform signals.\n", "\n", "Our **objectives** are to:\n", "- Understand a template-matching approach to assess signal quality of cardiovascular signals.\n", "- Apply the template-matching approach to ECG and PPG signals.\n", "- Understand how to interpret the results." ] }, { "cell_type": "markdown", "metadata": { "id": "efztffyOpHV-" }, "source": [ "
Context: Physiological signals can be subject to noise from multiple sources. Signal quality assessment algorithms assess the quality of signals to determine whether they are of sufficient quality for a particular purpose (such as heart rate estimation). In this tutorial we will use the template-matching signal quality assessment algorithm described in this publication.
Extension: If you want to find out more about photoplethysmography (PPG) signal quality assessment then I'd recommend this publication.
Question: What value of correlation coefficient would result in this being low quality?
Extension 1: How could we extend this to assess the quality of PPG signals? Consider what threshold would be required (see the original publication) and how the code would need to be adjusted.
Further reading: this book chapter provides further information on PPG signal quality assessment.