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Proceedings Paper

Novel measure for the calibration of laser Doppler flowmetry devices
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Paper Abstract

The metrological basis for optical non-invasive diagnostic devices is an unresolved issue. A major challenge for laser Doppler flowmetry (LDF) is the need to compare the outputs from individual devices and various manufacturers to identify variations useful in clinical diagnostics. The most common methods for instrument calibration are simulants or phantoms composed of colloids of light-scattering particles which simulate the motion of red blood cells based on Brownian motion. However, such systems have limited accuracy or stability and cannot calibrate for the known rhythmic components of perfusion (0.0095-1.6 Hz). To solve this problem, we propose the design of a novel technique based on the simulation of moving particles using an electromechanical transducer, in which a precision piezoelectric actuator is used (e.g., P-602.8SL with maximum movement less than 1 mm). In this system, Doppler shift is generated in the layered structure of different solid materials with different optical light diffusing properties. This comprises a fixed, light transparent upper plane-parallel plate and an oscillating fluoroplastic (PTFE) disk. Preliminary studies on this experimental setup using the LDF-channel of a “LAKK-M” system demonstrated the detection of the linear portion (0-10 Hz with a maximum signal corresponding to Doppler shift of about 20 kHz) of the LDF-signal from the oscillating frequency of the moving layer. The results suggest the possibility of applying this technique for the calibration of LDF devices.

Paper Details

Date Published: 4 March 2014
PDF: 7 pages
Proc. SPIE 8936, Design and Quality for Biomedical Technologies VII, 89360D (4 March 2014); doi: 10.1117/12.2035651
Show Author Affiliations
Andrey V. Dunaev, Univ. of Dundee (United Kingdom)
State Univ. Educational Scientific Production Complex (Russian Federation)
Evgeny A. Zherebtsov, State Univ. Educational Scientific Production Complex (Russian Federation)
Dmitrii A. Rogatkin, Moscow Regional Research and Clinical Institute (Russian Federation)
Neil A. Stewart, Univ. of Dundee (United Kingdom)
Sergei G. Sokolovski, Univ. of Dundee (United Kingdom)
Edik U. Rafailov, Univ. of Dundee (United Kingdom)

Published in SPIE Proceedings Vol. 8936:
Design and Quality for Biomedical Technologies VII
Ramesh Raghavachari; Rongguang Liang, Editor(s)

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