Fig. 4.

(a) Black board (ROI 1) and Spectralon or turbid phantom (ROI 2) high contrast target with a 5 mm scale bar. Relative dynamic range quantified using (b) SFDI images with respect to f_x (λ = 600 nm, shown with fitted curves) and (d) line scanning with respect to f_c (λ = 410 nm). In (c), the noise floor of reflectance lines from the Spectralon and turbid phantom (red line) define the maximum gate width (Spectralon, blue lines, δ ≈ 18 mm; turbid phantom, green lines, δ ≈ 22 mm). Corresponding f_c values are shown in (d) along left edge with the same coloring.