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Pseudo-colored ratiometric two-photon microscopy images (Ch2/Ch1) of normal, ulcer, adenoma, and cancer tissue. (A) Ratio value (Ch2/Ch1) box plots of normal, ulcer, adenoma, and cancer tissue (***P < 0.001, NS, not significant). (B) Endoscopic image. (C) Two-photon microscopy images in SG1. (D) Two-photon microscopy images in SE1. (E) Two-photon microscopy images in SHC. (F) Histopathologic image with hematoxylin and eosin staining.
