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Proceedings Paper

New developments in non-invasive biomedical optics
Author(s): Frits F. M. de Mul
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Paper Abstract

We will present an overview of some new optical diagnostic techniques that have emerged in the past few years. Among those: *Photon Transillumination of Tissue. Pulsed or modulated laser light is scattered and/or absorbed in tissue. The position of scattering layers and discrete absorbers will influence the pattern of light emerging from inside. Image analysis will reveal those positions. *Photoacoustics of Tissue. Not the emerging light but ultrasound waves, produced by adiabatic heating (approximately 1 K) of blood cells by absorption of laser photons, are detected at the surface. The relatively low sound velocity allows to perform time-of-flight measurements, thus enabling to obtain depth-sensitive information. *Laser Doppler Monitoring and Imaging. On one hand the traditional monitoring technique is being upgraded in a large-scale European Standardization project. On the other, new imaging techniques are emerging. Also, laser-Doppler using self-mixing techniques renders flow information from inside arteries.

Paper Details

Date Published: 23 October 2001
PDF: 11 pages
Proc. SPIE 4606, Laser Florence 2000: A Window on the Laser Medicine World, (23 October 2001); doi: 10.1117/12.446708
Show Author Affiliations
Frits F. M. de Mul, Univ. of Twente (Netherlands)

Published in SPIE Proceedings Vol. 4606:
Laser Florence 2000: A Window on the Laser Medicine World
Leonardo Longo; Alfons G. Hofstetter; Mihail-Lucian Pascu; Wilhelm R.A. Waidelich, Editor(s)

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