Table 1.

Attenuation coefficients estimated by the OCT slope method (Eq. (3)) from the uniform phantoms (205 B-scans per phantom, fitted over 0.5 mm) for different TiO₂ weight concentrations. The large amount of data available for the fitting procedure resulted in a standard error smaller than 0.02 mm⁻¹ for all phantoms.

TiO2 conc. (w%)	0	0.01	0.025	0.05	0.1	0.25	0.5	1
OCT slope (mm−1)	0.04	0.28	0.20	0.59	0.98	2.8	4.9	7.6