Photoacoustic imaging using an adaptive interferometer with a photorefractive crystal

Authors

  • Armin Hochreiner,

    Corresponding author
    1. Christian Doppler Laboratory for Photoacoustic Imaging and Laser Ultrasonics, Altenbergerstrasse 69, 4040 Linz, Austria
    • Phone: +43 732 2468 4654, Fax: +43 732 2468 4606
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  • Thomas Berer,

    1. Christian Doppler Laboratory for Photoacoustic Imaging and Laser Ultrasonics, Altenbergerstrasse 69, 4040 Linz, Austria
    2. Research Center for Non-Destructive Testing GmbH RECENDT, Altenbergerstrasse 69, 4040 Linz, Austria
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  • Hubert Grün,

    1. Research Center for Non-Destructive Testing GmbH RECENDT, Altenbergerstrasse 69, 4040 Linz, Austria
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  • Michael Leitner,

    1. Research Center for Non-Destructive Testing GmbH RECENDT, Altenbergerstrasse 69, 4040 Linz, Austria
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  • Peter Burgholzer

    1. Christian Doppler Laboratory for Photoacoustic Imaging and Laser Ultrasonics, Altenbergerstrasse 69, 4040 Linz, Austria
    2. Research Center for Non-Destructive Testing GmbH RECENDT, Altenbergerstrasse 69, 4040 Linz, Austria
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Abstract

In this paper we report on remote three-dimensional photoacoustic imaging without the need for a coupling agent or other aids (e.g. detector foils) by utilizing a two-wave mixing interferometer (TWMI). In this technique the beams coming from sample and reference are brought to interfere in a Bi12SiO20 photorefractive crystal (PRC). Such a setup allows the measurement of ultrasonic displacements on rough sample surfaces. After data acquisition the initial pressure distribution is reconstructed by a Fourier domain synthetic aperture focusing technique (FSAFT). We present three-dimensional imaging of a hair ribbon phantom, on biological samples with embedded artificial blood vessels or pig bristles, and measurements on a human forearm in-vivo. (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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