Fig. 1.

Fitting process for an averaged ± SD, normalized PpIX photobleaching curve for an irradiance of 60 mW cm⁻² and sBCC lesions. The data were measured from five lesions. a: The simulated bleaching curves with a constant initial velocity 300 μm second⁻¹ and 1st blood velocity reduction at 2.4 J cm⁻². b: Simulated bleaching curves with a single reduced velocity of 113 μm second⁻¹ at 2.4 J cm⁻² and a 2nd blood velocity reduction at 6 J cm⁻². The best-fit parameters for this bleaching curve are 113 and 70 μm second⁻¹ at 2.4 and 6 J cm⁻², respectively.