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Proceedings Paper

Real-time photoacoustic imaging with optical ultrasound detection
Author(s): R. Nuster; G. Paltauf
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Paper Abstract

Optical ultrasound detection has become an attractive alternative to piezoelectric ultrasound detection for photoacoustic imaging. The favorable properties of optical detection are high resolution, complete optical and acoustical transparency. Recently, it has been shown that optical phase contrast full field detection in combination with a CCD-camera can be used to record acoustic fields. This allows to obtain two-dimensional photoacoustic projection images in real-time. The present work shows an extension of the technique towards full three-dimensional photoacoustic tomography. The specifications of the detection system, resolution and sensitivity, are 66μm and 3.4kPa. The reconstruction of the initial three dimensional pressure distribution is a two step process. First of all, projection images of the initial pressure distribution are acquired. This is done by back propagating the observed wave pattern in frequency space. In the second step the inverse Radon transform is applied to the obtained projection dataset to reconstruct the initial three dimensional pressure distribution. Simulations and experiments are performed to show the overall applicability of this technique for real-time photoacoustic imaging.

Paper Details

Date Published: 23 February 2012
PDF: 7 pages
Proc. SPIE 8223, Photons Plus Ultrasound: Imaging and Sensing 2012, 82231K (23 February 2012); doi: 10.1117/12.910195
Show Author Affiliations
R. Nuster, Karl-Franzens-Univ. Graz (Austria)
G. Paltauf, Karl-Franzens-Univ. Graz (Austria)

Published in SPIE Proceedings Vol. 8223:
Photons Plus Ultrasound: Imaging and Sensing 2012
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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