Optoacoustic imaging system with improved collection efficiency

Dmitri Tsyboulski; André Conjusteau; Sergey A. Ermilov; Hans-Peter F. Brecht; Anton Liopo; Richard Su; Vyacheslav Nadvoretsky; Alexander A. Oraevsky

doi:10.1117/12.877723

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11 April 2011 Optoacoustic imaging system with improved collection efficiency

Dmitri Tsyboulski, André Conjusteau, Sergey A. Ermilov, Hans-Peter F. Brecht, Anton Liopo, Richard Su, Vyacheslav Nadvoretsky, Alexander A. Oraevsky

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Proceedings Volume 7899, Photons Plus Ultrasound: Imaging and Sensing 2011; 78991D (2011) https://doi.org/10.1117/12.877723
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

We introduce a novel experimental design for non-invasive scanning optoacoustic microscopy that utilizes a parabolic surface for ultrasound focusing. We demonstrate that off-axis parabolic mirrors made of sufficiently high acoustic impedance materials work as ideal reflectors in a wide range of apertures and provide lossless conversion of a spherical acoustic wavefront into a plane wave. We further test the performance of a custom optoacoustic imaging setup which was developed and built based on these principles. The achieved resolution limit of 0.3 mm, with NA of 0.5 and the transducer bandwidth of 5 MHz, matches the resolution limit defined by diffraction. Although further improvements of current experimental setup are required to achieve resolution similar to leading microscopy systems, this proof-of-concept work demonstrates the viability of the proposed design for optoacoustic microscopy applications.

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Dmitri Tsyboulski, André Conjusteau, Sergey A. Ermilov, Hans-Peter F. Brecht, Anton Liopo, Richard Su, Vyacheslav Nadvoretsky, and Alexander A. Oraevsky "Optoacoustic imaging system with improved collection efficiency", Proc. SPIE 7899, Photons Plus Ultrasound: Imaging and Sensing 2011, 78991D (11 April 2011); https://doi.org/10.1117/12.877723

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