Fig. 1. Full-field optical coherence tomography system

Fig. 2. Nephron structure[19]

Fig. 3. Histology sections of renal cortex[20]

Fig. 4. Cross-sectional images of kidney cortex obtained with FFOCT. (a) Structures around renal corpuscle; (b) structure of renal cortex (arrow points to tube cavity); (c) and (d) histology section images of corresponding positions

Fig. 5. Structure of colonic epithelial tissue[22]

Fig. 6. Morphology differences of normal colonic glandular epithelium and colonic adenocarcinoma. (a) 200 times amplification of normal colonic epithelium, red arrow points to goblet cells[23]; (b) 200 times amplification of tumor tissue, no goblet cells, red arrow points to tumor tissue cells[24]

Fig. 7. Normal colon tissue. (a) FFOCT image; (b) image of the corresponding histology section

Fig. 8. Images of colon adenocarcinoma tissue obtained with FFOCT. (a) Irregular glands 10 μm away from surface, none goblet cells in gland; (b) muscularis mucosae in bottom right and lamina propria in upper right 30 μm away from surface; (c) corresponding histology section image