Evaluation of different signal processing algorithms in laser Doppler perfusion measurements

Martin Leahy; Adam Liebert; Roman Maniewski

doi:10.1117/12.475836

27 August 2003 Evaluation of different signal processing algorithms in laser Doppler perfusion measurements

Martin Leahy, Adam Liebert, Roman Maniewski

Proceedings Volume 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications; (2003) https://doi.org/10.1117/12.475836
Event: OPTO Ireland, 2002, Galway, Ireland

Abstract

The Laser-Doppler (LD) method is extensively used in clinical experiments for microcirculation measurement. The results of LD perfusion measurements depends on technical factors such as laser light wavelength, LD probe arrangement, and signal processing algorithm. The aim of this study is to compare the output of various signal processing algorithms (LDP) with the use of digital spectral analysis of the photodetector current. Comparison is made with the output of a commercial LD instrument (LDF). The results obtained using a simple one-tube physical model confirm that the best linearity of response of the LD instrument for changes of flow velocity is given by the algorithm based on first moment of power spectral density of AC component of photodetector's signal.

Citation Download Citation

Martin Leahy, Adam Liebert, and Roman Maniewski "Evaluation of different signal processing algorithms in laser Doppler perfusion measurements", Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); https://doi.org/10.1117/12.475836

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KEYWORDS

Signal processing

Photodetectors

Blood

Doppler effect

Laser processing

Calibration

Filtering (signal processing)

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