FIG. 6.

Line indentation of phantom A with different indentation step sizes. The indentation tip diameter was 2 mm. The original stiffness profile sampled at 0.2 mm was subsampled to 1.0 mm and 2.0 mm.

Line indentation of phantom A with different indentation step sizes. The indentation tip diameter was 2 mm. The original stiffness profile sampled at 0.2 mm was subsampled to 1.0 mm and 2.0 mm.