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11 April 2011 Optoacoustic imaging system with improved collection efficiency
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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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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