Coordinate-tracing Model Of Light Scattered By Turbid Media

The optical techniques based on measuring the scattering properties of tissue have the potential to determine internal physiological state. For imaging of tissues, the least-scattered photons that arrive at a detector may have a significant effect on the development of imaging algorithms and may be helpful for further understanding of imaging mechanisms within current high-resolution optical-imaging techniques. Based on the vertex-propagator, in this dissertation a coordinate-tracing model is developed to find probability distributions for scattered photons in a scattering medium, and integral expressions for photon experiencing any time scattering events that traversing different thickness medium or reflected from different depth in the medium are obtained; furthermore, the multiple integral are computed by the use of non-weight Monte-Carlo integration method. The simulation results showed that our model is very simple and easy to programme.