Table 2.

Estimated depths and [PpIX] in ex vivo tissue with [PpIX] of the inclusion = 5 μg/ml. The measured tissue optical properties were: μ_ax = 0.012 ± 0.0007 mm⁻¹, μ’_s,x = 2.74 ± 0.14 mm⁻¹, μ_a,m= 0.0046 ± 0.00014 mm⁻¹ and μ’_s,m= 2.24 ± 0.085 mm⁻¹, * indicates p < 0.05

nominal depth (mm)	2.5	4.5	9
estimated depth (mm)	2.30 ± 0.02	5.00 ± 0.07	6.48 ± 0.03*
estimated [PpIX] (μg/ml)	4.88 ± 0.32	6.4 ± 0.85	7.04 ± 0.78*