Introduction

The introduction… some of this content can be just copied/pasted froom the manuscript and/or viceversa.

Background

The background

ECG signals

Brief intro to ECG?

PPG signals

Brief intro to PPG?

SQI indexes

The Signal Quality Indexes (SQIs) are …. These are classified into the following three domains: (i) statistical domain where … (ii) signal processing domain where and (iii) dynamic time warping domain. A summary of the SQI metrics is presented below.

Acronym	Domain	Status
perfusion
kurtosis	statistical
skewness	statistical
entropy	signal processing
signal_to_noise
zero_crossings_rate	signal processing
mean_crossing_rate	signal processing
DTW	dynamic time warping
rpeaks
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Warning

Include [R] in the previous table.

[1] Optimal Signal Quality Index for Photoplethysmogram Signals, (Mohamed Elgendi et al)

[2] …

[3] …

• Perfusion

  Brief description

  See: vital_sqi.sqi.standard_sqi.perfusion_sqi

  Examples: XXX | XXX | XXX

• Kurtosis

  Brief description or link to scipy function.

  See: vital_sqi.sqi.standard_sqi.kurtosis_sqi

  Examples: XXX | XXX | XXX

• Skewness

  Brief description or link to scipy function.

  See: vital_sqi.sqi.standard_sqi.skewness_sqi

  Examples: XXX | XXX | XXX

• Signal to noise

  Brief description

  See: vital_sqi.sqi.standard_sqi.signal_to_noise_sqi

  Examples: XXX | XXX | XXX

• Zero crossings rate

  Brief description

  See: vital_sqi.sqi.standard_sqi.zero_crossings_rate_sqi

  Examples: XXX | XXX | XXX

• Mean crossing rate

  Brief description

  See: vital_sqi.sqi.standard_sqi.mean_crossing_rate_sqi

  Examples: XXX | XXX | XXX

• Dynamic time warping

  Brief description

  See: vital_sqi.sqi.dtw_sqi.dtw_sqi

  Examples: XXX | XXX | XXX