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Proceedings Paper

Pulsed laser Doppler flowmetry for increased signal-to-noise ratio and probed depth
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Paper Abstract

In laser Doppler flowmetry (LDF) deep perfusion measurements can be realized by using a large separation between the fibers used for illumination and detection. In order to achieve a sufficient signal-to-noise ratio, the power of the laser light can be increased, but only to the limit indicated by the safety regulations. In this paper, pulsed laser Doppler flowmetry (pLDF) is presented as a manner to increase the SNR without exceeding the safety limits. The method is based on the principle that light is needed only when the signal is being sampled. The setup is presented, and we will show results that indicate that equivalent results are obtained for a pulsed and continuous wave setup (cwLDF), however with a much smaller tissue exposure. Furthermore, the limits encountered in realizing a pulsed system will be discussed.

Paper Details

Date Published: 23 July 2003
PDF: 6 pages
Proc. SPIE 4965, Optical Diagnostics and Sensing in Biomedicine III, (23 July 2003); doi: 10.1117/12.478384
Show Author Affiliations
Wiendelt Steenbergen, Univ. Twente (Netherlands)
Roy G. M. Kolkman, Univ. Twente (Netherlands)
Sven Woldberg, Univ. Twente (Netherlands)
Frits F. M. de Mul, Univ. Twente (Netherlands)

Published in SPIE Proceedings Vol. 4965:
Optical Diagnostics and Sensing in Biomedicine III
Alexander V. Priezzhev; Gerard L. Cote, Editor(s)

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