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(A) Photograph of the tube phantom and tabulation of the donor (R6G) and acceptor (DQOCI) concentrations. (B) Fluorescence microscopy and (C) OR-PAM of the same tube phantom with overlaid mouse skin tissue at 523 nm. (D) B-scan OR-PAM image of the tubes acquired at 523 nm. Scale bars: 500 μm. FL, fluorescence. PA, photoacoustic. Reproduced from Wang and Wang (40).
