ASSESS_PPG_QUALITY - Assess quality of a PPG signal.

ASSESS_PPG_QUALITY assesses the quality a photoplethysmogram (PPG) signal using a specified quality assessment algorithm.

Inputs

  • ppg : a vector of PPG values

  • fs : the sampling frequency of the PPG in Hz

  • options : a stucture of options (as detailed below)

Options

  • beat_detector : a string specifying the beat detector algorithm to be used (default is MPSTDfast (v2))

  • quality_metrics - a string specifying the quality assessment algorithm to be used, or a cell specifying multiple quality assessment algorithms. Options are:

    • 'snr' : signal-to-noise ratio (after filtering the signal from 0.5-12 Hz)
    • 'amp_metrics' : amplitude metrics (AC amplitude, DC amplitude, and AC:DC ratio)
    • 'sig_sim' : signal similarity metric
    • 'tm_cc' : template-matching correlation coefficient
    • 'dtw' : dynamic time-warping template-matching
    • 'stats_metrics' : statistical metrics
    • 'morph_metrics' : pulse wave morphology metrics
    • 'spectrum_metrics' : power spectrum metrics

  • win_durn : the duration of the windows used to perform PPG signal quality assessment (in secs) (default is 10 secs)

Outputs

  • qual : quality assessment results (in a structure)

  • onsets : indices of pulse onsets

  • win_start_els : indices of window starts

  • win_end_els : indices of window ends

Documentation

https://ppg-quality.readthedocs.io/

Author

Peter H. Charlton, University of Cambridge, 2024.

MIT License

   Copyright (c) 2024 Peter H. Charlton
   Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
   The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.