Fig. 1. Schematic view of experimental setup. 1, PDT laser device; 2, fiber optics cable; 3, collimator; 4, tissue samples; 5, integrating sphere; 6, photodiode amplifier; 7, computer.

Fig. 2. Wavelength spectrum of the PDT laser device.

Fig. 3. Dehydration levels of the tissue samples as a function of time for dehydration and control groups.

Fig. 4. (a) Absorption coefficient and (b) reduced scattering coefficient of the tissue samples as a function of incubation time.

Fig. 5. (a) Absorption and (b) reduced scattering coefficients of tissue samples as a function of dehydration levels.

Fig. 6. Fluence rate distributions inside the fresh, purified, dehydrated, and coagulated tissue models as a function of depth.