Title :
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
fDate :
3/1/2012 12:00:00 AM
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;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2011.2131646
