A simple multiple flux model, which is equivalent to the diffusion approximation, is derived
from the equation of transfer in a plane as well as in a spherical geometry. The equations …

When a picosecond light pulse is incident upon a turbid medium such as tissue, the
temporal distribution of diffusely reflected and transmitted photons depends on the optical …

Diffusion theory is widely used to describe photon migration in turbid media because it is
simple and, in certain cases, can be accurate to within a few percent. However, it neglects …

Various characteristics of photon diffusion process in biological tissues are examined for the
following geometries:(1) a semi-infinite homogeneous medium,(2) a homogeneous slab with …

We study light propagation in biological tissue using the radiative transport equation. The
Green's function is the fundamental solution to the radiative transport equation from which all …

Using the method of images, we examine the three boundary conditions commonly applied
to the surface of a semi-infinite turbid medium. We find that the image-charge configurations …

This paper is the first of two reviewing the propagation of electromagnetic radiation of
wavelength 0.25–10 μ m in tissue. After a brief discussion of light/tissue interactions, a …

Using optical interaction coefficients typical of mammalian soft tissues in the red and near
infrared regions of the spectrum, calculations of fluence-depth distributions, effective …

The accuracy of the diffusion approximation is compared with more accurate solutions for
describing light interaction with biological tissues. Generally the diffusion approximation …

The depth at which photons penetrate into a diffusive medium before being re-emitted has
been investigated with reference to a semi-infinite homogeneous medium illuminated by a …