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Photoacoustic histology imaging of hand-cut, thick brain samples. (a) and (b) Volumetric images captured by the conventional PAM and UV metasurface-assisted PAM, respectively, corresponding to the MAP images in (c) and (d). (e) and (f) Magnified images of the corresponding positions marked by yellow dashed and solid boxes in (c) and (d), respectively. UVM: UV metasurface.
