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Photoplethysmogram Measurement Without Direct Skin-to-Sensor Contact Using an Adaptive Light Source Intensity Control

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5 Author(s)
Hyun Jae Baek ; Grad. Program in Bioeng., Seoul Nat. Univ., Seoul, South Korea ; Gih Sung Chung ; Ko Keun Kim ; Jung Soo Kim
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We developed a chair-attached, nonintrusive photoplethysmogram (PPG) measuring system for everyday life, unconstrained monitoring using nonskin-contacting sensor-amplifier circuits capable of emitting suitable light intensity adaptable to clothing characteristics. Comparison between proposed and conventional systems showed reasonable correlation and root-mean-squared error levels, indicating its feasibility for unconstrained PPG monitoring.

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Information Technology in Biomedicine, IEEE Transactions on  (Volume:13 ,  Issue: 6 )