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Optoacoustic tomography (OAT) conventionally relies on curved detectors to maximize the sensitivity and lateral resolution. Here, we present an alternative paradigm to OAT that creates a virtual detector array with a high angular acceptance and sensitivity by using coded acoustic apertures and a flat piezoelectric detector. Using this approach, we created a 2D virtual array with 1763 elements and performed OAT of a complex 3D object with approximate axial and lateral resolutions of 150 μm and 500 μm in a flat detection geometry, demonstrating an image quality comparable to the one achieved with curved detection geometries.
E. Hahamovich,S. Monin,Y. Hazan,M. Nagli, andA. Rosenthal
"3D optoacoustic tomography via coded acoustic apertures", Proc. SPIE 11642, Photons Plus Ultrasound: Imaging and Sensing 2021, 116420D (5 March 2021); https://doi.org/10.1117/12.2576986
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E. Hahamovich, S. Monin, Y. Hazan, M. Nagli, A. Rosenthal, "3D optoacoustic tomography via coded acoustic apertures," Proc. SPIE 11642, Photons Plus Ultrasound: Imaging and Sensing 2021, 116420D (5 March 2021); https://doi.org/10.1117/12.2576986