Simulation of light propagation in bio-tissue under cylindrical boundary condition

Formulas for light propagation in biotissue with cylindrical boundaries are deduced. A model simulating light propagation in one-layered biotissue with a cylindrical boundary is established. Simulation results of the density distribution of absorbed photons are shown when a circularly flat beam is incident on the biotissue. The model can easily be extended to multilayered tissues with cylindrical boundary.