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Photoacoustic images of melanoma lesion and nearby healthy skin at 532 nm illumination wavelength. (a) Abdominal: (i) Lesion and (ii) healthy. (b) Flank: (i) Lesion and (ii) healthy. (c) Bar chart of average pixel intensity from epidermal region in the PA images of 532 nm. E: Epidermis. Epidermal pixels (white dashes). The PA signal was increased in the melanoma, highlighting the increase in melanin.
