The quality of PPG signals measured in different postures:

The quality of PPG signals measured in different postures:

<p>(upper row, <b>A</b>– <b>C</b>) comparison between postures with arm in the natural position for each posture; (lower row, <b>D</b>– <b>F</b>) comparison between postures with sensor at heart height. Each row shows: (left, A and D) the SNR; (m...

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Bibliographic Details
Main Author:	Peter H. Charlton (11389289) (author)
Other Authors:	Vaidotas Marozas (10299244) (author), Elisa Mejía-Mejía (9156875) (author), Panicos A. Kyriacou (21615719) (author), Jonathan Mant (606205) (author)
Published:	2025
Subjects:	Medicine Cell Biology Neuroscience Physiology Developmental Biology Mental Health Space Science Biological Sciences not elsewhere classified Chemical Sciences not elsewhere classified matching correlation coefficient darker skin tones allowing dc amplitude wrist </ p snr either decreased ppg dc amplitude highest qualities observed photoplethysmography signal quality arm hanging alongside 7 db ), 5 db ), lowest whilst standing signal quality increased 7 db 5 db snr ), signal quality arm alongside whilst sitting varying ages standing postures similar trends pi ), physiological monitoring perfusion index participant characteristics natural height monitored parameters identify factors highly susceptible heart height health statuses different heights consumer devices bp dataset arm resting also highlights 142 subjects 001 ).
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Summary:	<p>(upper row, <b>A</b>– <b>C</b>) comparison between postures with arm in the natural position for each posture; (lower row, <b>D</b>– <b>F</b>) comparison between postures with sensor at heart height. Each row shows: (left, A and D) the SNR; (middle, B and E) the PI; and (right, C and F) the TMCC. <i>Definition: An asterisk (*) indicates a statistically significant difference.</i></p>