A diffusion model incorporating anisotropic properties

A mathematical model suggested by Orsingher, motivated by possible applicability to diffusion processes in which anisotropic scattering is significant, is reanalyzed. It is shown that the propagator for the full multi-dimensional model does not satisfy a telegrapherʹs equation, as suggested by Orsingher, but that the propagator for the projection of motion on any one of the axes does. This can be used to analyze the results of a class of optical scattering measurements.