title: Calculating the response of isotropic light dosimetry probes as a function of the tissue refractive index.
abstract: The response of an isotropic light dosimetry probe as function of the tissue refractive index (n) has been calculated using diffusion theory. The response has also been measured in a collimated light beam with the probe in air, water (n = 1.33), ethylene glycol (n = 1.43), and glycerin (n =1.46). For a 3.2-mm diam probe with little light absorption, the theoretical result depends only on n and differs from the experimental data by not more than 6%. For a 0.8-mm diam probe with some light absorption, excellent agreement between theory and experiment is obtained by adjusting the absorption and the reduced scattering coefficients of the probe material.
authors.forename: W M
authors.initials: WM
authors.lastname: Star
authors.forename: J P
authors.initials: JP
authors.lastname: Marijnissen