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Proceedings Paper

Modeling of near-field and far-field diffraction effects of optoacoustic measurements in tissues
Author(s): S. Boonsang; Richard J. Dewhurst
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Paper Abstract

This paper describes the application of a diffraction correction method based on an exact Lommel diffraction formulation applied to an optoacoustic signal. It is already known that the optoacoustic signal contains valuable information about tissue optical properties. Using time-resolved analysis, the tissue optical absorption coefficient can be easily determined. Normally, corresponding experiments measure signals close (a few mms) to an optoacoustic source. However, it is desirable, in some cases, to perform signal detection in the far field. This leads to changes in pulse shape within optoacoustic signals. The paper presents a new method based on a closed-form formulation to correct diffraction effects in the source/detector geometry. Experimental evidence validates predicted results for the case of a 1 mm hydrophone.

Paper Details

Date Published: 29 July 2004
PDF: 10 pages
Proc. SPIE 5486, ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics, (29 July 2004); doi: 10.1117/12.572030
Show Author Affiliations
S. Boonsang, Univ. of Manchester Institute of Science and Technology (United Kingdom)
Richard J. Dewhurst, Univ. of Manchester Institute of Science and Technology (United Kingdom)


Published in SPIE Proceedings Vol. 5486:
ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics
Ruikang K. Wang; Jeremy C. Hebden; Alexander V. Priezzhev; Valery V. Tuchin, Editor(s)

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