fig1

Figure 1. A photograph (side view) of the original human BCC skin specimen used in the experiments (left). The specimen was sliced in vertical direction indicated by the red line. Twenty-eight slices were made with 50 µm thickness for each slice. In the middle is the photograph of a piece of vertical slice of BCC with the size of 5.6 mm × 8.3 mm × 50 µm, where the yellow arrow indicates the direction of measurement steps in depth. The right images were taken from the top and bottom edges of the BCC slice. The red arrows show the sites at the top and bottom of the slice where the two images are taken. BCC: basal cell carcinoma