Time resolved three-dimensional acousto-optic imaging of thick scattering media |
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Authors: | Farahi Salma Benoit Emilie Grabar Alexander A Huignard Jean-Pierre Ramaz Francois |
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Institution: | Institut Langevin, ESPCI ParisTech, CNRS UMR 7587, INSERM U979, 10 Rue Vauquelin, F-75231 Paris Cedex 05, France. |
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Abstract: | Acousto-optic imaging is based on light interaction with focused ultrasound in a scattering medium. Thanks to photorefractive holography combined with pulsed ultrasound, we perform a time-resolved detection of ultrasound-modulated photons in the therapeutic window (780 nm). A high-gain SPS:Te crystal is used for this purpose and enables us to image through large optical thickness (500 mean free paths). We are able to generate three-dimensional (3D) acousto-optic images by translating a multielement ultrasound probe in only one direction. A 3D absorbing object is imaged through a 3 cm thick phantom. |
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