Technology term
Photoplethysmography (PPG)
An optical sensing method that shines light into tissue and measures changes in reflected or transmitted light caused by changing blood volume. Wearables use it to derive pulse waveforms, but movement, skin contact and temperature can affect signal quality.
English
Photoplethysmography
Arabic
التصوير الضوئي للنبض
First appeared in
Smartwatch Signals Detected Hypertension With 65.8% Sensitivity
