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Proceedings Paper

Thermoacoustic tomography using a fiber-based Fabry-Perot interferometer as an integrating line detector
Author(s): P. Burgholzer; C. Hofer; G. J. Matt; G. Paltauf; M. Haltmeier; O. Scherzer
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Paper Abstract

Thermoacoustic tomography is based on the generation of acoustic waves by a bulk illumination of a sample with a short electromagnetic pulse. The thermal expansion of the sample generates acoustic waves. The absorption density inside the sample is reconstructed from the acoustic pressure signals measured outside of the sample. So far signals have been collected with small detectors that approximate point-detectors. In the present study we report on a novel measurement setup applying integrating detectors. With these detectors the pressure is integrated along one or two dimensions. This enables the use of numerically efficient algorithms, such as the inverse Radon transformation, for thermoacoustic tomography. To reconstruct a three-dimensional image, either a two-dimensional integrating detector has to be moved tangentially around a sphere enclosing the object or an array of line-detectors has to be rotated around a single axis. Implementations of line-detectors are demonstrated that are adaptations of a Fabry--Perot interferometer. As a novel approach for the implementation a Fabry-Perot interferometer consisting of a single mode fiber is demonstrated.

Paper Details

Date Published: 6 March 2006
PDF: 9 pages
Proc. SPIE 6086, Photons Plus Ultrasound: Imaging and Sensing 2006: The Seventh Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 60861N (6 March 2006); doi: 10.1117/12.644047
Show Author Affiliations
P. Burgholzer, Upper Austrian Research (Austria)
C. Hofer, Upper Austrian Research (Austria)
G. J. Matt, Upper Austrian Research (Austria)
G. Paltauf, Karl-Franzens-Univ. Graz (Austria)
M. Haltmeier, Leopold-Franzens Univ. Innsbruck (Austria)
O. Scherzer, Leopold-Franzens Univ. Innsbruck (Austria)


Published in SPIE Proceedings Vol. 6086:
Photons Plus Ultrasound: Imaging and Sensing 2006: The Seventh Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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