The Optical Properties of Tissues at 633 Nanometers as Related to Light Dosimetry in Photodynamic Therpy

In Photodynamic therapy with hematoporphyrin derivative the usual irradiation wavelength is around 630 nm. Here we will discuss the optical properties of tissues in this region and examine the accuracy required in order to adequately calculate the spatial distributions of light in tissue. The fundamental, “microscopic” optical properties of tissues are the absorption and scattering coefficients, Σa and Σs and the scattering phase function S(Θ), …