Self-Mixing Laser Doppler Spectra of Extracorporeal Blood Flow: A Theoretical and Experimental Study

Author

Norgia, M. ; Pesatori, A. ; Rovati, L.

Author_Institution

Dipt. di Elettron. e Inf., Politec. di Milano, Milan, Italy

Volume

12

Issue

3

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

552

Lastpage

557

Abstract

Theoretical and experimental analysis of the spectral characteristics of the signal acquired from self-mixing laser Doppler of extracorporeal blood flow is presented. The theoretical spectrum of the predetected signal is calculated in the single scattering approximation and assuming a parabolic velocity profile in the duct. The resulting signal is mixed in a diode laser cavity to generate the sensor output. Theoretical predictions are verified by measurements performed on blood and phantoms flowing in an extracorporeal circulation system.

Keywords

Doppler effect; biomedical optical imaging; blood; haemodynamics; laser velocimetry; medical signal processing; phantoms; semiconductor lasers; spectral analysis; diode laser cavity; duct; extracorporeal blood flow; extracorporeal circulation system; parabolic velocity profile; phantoms; self-mixing laser Doppler spectra; single scattering approximation; spectral characteristics; theoretical spectrum; Blood; Cavity resonators; Doppler effect; Laser beams; Measurement by laser beam; Optical interferometry; Scattering; Biomedical intrumentation; blood velocity measurement; optical flow sensor; optical interferometry;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2011.2131646

Filename

5739095