Multi-scales optical description of biological tissues and light propagation model

In this paper, a new scheme is proposed to describe the optical properties of biological tissues from three scales: molecules, cells, and tissues. The electric susceptibility, refractive index and radiative transfer parameters (including scattering coefficient, absorption coefficient, anisotropic factor, etc.) are the corresponding optical parameters on those three scales. And the dipole theory, electromagnetic scattering theory and radiative transfer theory are corresponding theoretical tools for analyzing the optical phenomena in biological tissues, respectively. Moreover, the relationships between those optical parameters are also discussed comprehensively.