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Proceedings Paper

Imaging of optically diffusive media by use of opto-elastography
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Paper Abstract

We present a camera-based optical detection scheme designed to detect the transient motion created by the acoustic radiation force in elastic media. An optically diffusive tissue mimicking phantom was illuminated with coherent laser light, and a high speed camera (2 kHz frame rate) was used to acquire and cross-correlate consecutive speckle patterns. Time-resolved transient decorrelations of the optical speckle were measured as the results of localised motion induced in the medium by the radiation force and subsequent propagating shear waves. As opposed to classical acousto-optic techniques which are sensitive to vibrations induced by compressional waves at ultrasonic frequencies, the proposed technique is sensitive only to the low frequency transient motion induced in the medium by the radiation force. It therefore provides a way to assess both optical and shear mechanical properties.

Paper Details

Date Published: 27 February 2007
PDF: 8 pages
Proc. SPIE 6437, Photons Plus Ultrasound: Imaging and Sensing 2007: The Eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 64370O (27 February 2007); doi: 10.1117/12.700524
Show Author Affiliations
Emmanuel Bossy, Lab. d'Optique Physique, ESPCI-CNRS UPR5 (France)
Arik R. Funke, Lab. d'Optique Physique, ESPCI-CNRS UPR5 (France)
Khalid Daoudi, Lab. d'Optique Physique, ESPCI-CNRS UPR5 (France)
Mickael Tanter, Lab. Ondes et Acoustique, ESPCI-CNRS UMR 7587, Univ. Paris 7 (France)
Mathias Fink, Lab. Ondes et Acoustique, ESPCI-CNRS UMR 7587, Univ. Paris 7 (France)
Claude Boccara, Lab. d'Optique Physique, ESPCI-CNRS UPR5 (France)


Published in SPIE Proceedings Vol. 6437:
Photons Plus Ultrasound: Imaging and Sensing 2007: The Eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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