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Schematic diagram of the device. (A) Schematic representation of AR-PAM system, OR-PAM system, and their photoacoustic images (39); (B) Three categories: circular, spherical, and planar geometry transducers of the PACT imaging system and their photoacoustic images (40-43). AR-PAM, acoustic-resolution photoacoustic microscopy; OR-PAM, optical-resolution photoacoustic microscopy; PACT, photoacoustic computed tomography.
