Nowadays, Monte Carlo techniques are very common for the development of Nuclear Medicine systems. Simulations can be very helpful for the optimization of SPECT and PET cameras, and for investigating the importance of several physical effects involved in image formation. In this paper, a...

A transport equation is derived for the probability density function (pdf) that gives the phase-space distribution of a particle moving in a random medium: the motion of the particle is determined by a general second-order stochastic differential equation that models transport in a medium...