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Proceedings Paper

Optical detection system for biomedical photoacoustic imaging
Author(s): Paul C. Beard; T. N. Mills
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Paper Abstract

An all-optical system for the detection of photoacoustic transients is under development for photoacoustic imaging applications. The sensing mechanism is based upon the detection of acoustically-induced variations in the optical thickness of a Fabry-Perot polymer film interferometer and provides an alternative to piezoelectric based detection methods. A key advantage is that the sensing geometry is defined by the area of the polymer sensing film that is optically addressed. This offers the prospect of obtaining sufficiently small element sizes and interelement spacing to e ply the synthetic focusing techniques of phased arrays for image reconstruction. The optical nature of detection also allows for a transparent sensor head through which the excitation laser pulses can be transmitted for backward-mode photoacoustic imaging. Preliminary work has shown that the detection sensitivity and bandwidth are comparable to wideband piezoelectric PVDF ultrasound transducers with the prospect of achieving substantially smaller element sizes.

Paper Details

Date Published: 19 May 2000
PDF: 10 pages
Proc. SPIE 3916, Biomedical Optoacoustics, (19 May 2000); doi: 10.1117/12.386310
Show Author Affiliations
Paul C. Beard, Univ. College London (United Kingdom)
T. N. Mills, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 3916:
Biomedical Optoacoustics
Alexander A. Oraevsky, Editor(s)

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