Comparative Study

Near-infrared transmittance pulse oximetry with laser diodes.

J Biomed Opt. 2003 Jul 1;8(3):525-33.
Comparative Study

Estimation of respiratory rate from ECG, photoplethysmogram, and piezoelectric pulse transducer signals: a comparative study of time-frequency methods.

IEEE Trans Biomed Eng. 2010 May 1;57(5):1099-107.
Article

Design of a visible-light spectroscopy clinical tissue oximeter.

J Biomed Opt. 2005 Jul 1;10(4):44005.