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Photoacoustic histology imaging of mouse brain slices. (a-c) Standard H&E staining, conventional PAM, and UV metasurface-assisted PAM images where the slices are from the adjacent tissue layers. (d-f) Magnified views from the corresponding regions marked by dashed boxes in (a-c), respectively. (g) The number of cell nuclei identified in the three images (d-e). Scale bars in (d-f): 100 µm. UVM: UV metasurface.
