Fig. 6.

(a) A cross-sectional GD-OCM image of a normal cheek skin; (b), (c), and (d) are the en face images at the corresponding depth indicated with the red arrows in Fig. 6(a), respectively; (e) a cross-sectional GD-OCM image of SCC located in cheek skin; (f), (g), and (h) are the en face images at the corresponding depth indicated with the red arrows in Fig. 6(e), respectively. The size of the cross-sectional images (a) and (e) is $1\times 0.6\mathrm{mm}$, and the size of the en face images is $1\times 1\mathrm{mm}$.