Study of Photon Propagation with various Energies through Bone by Monte Carlo Simulation

Abstract

The aim of radiation therapy is to maximise the dose to the tumour, while minimising the dose to healthy tissue. The Monte Carlo (MC) simulation by advantages of high accuracy, low cost, and describing the coupled transport of electrons and photons in complex geometries is used increasingly in radiation therapy. Since 50-80% of the human body is water, many studies have carried out the photons propagation in tissue, although no serious study has performed in bone. The bone, because of its high density, as well high ability of scattering and absorption of photons is important matter in radiation therapy. The aim of present work was the MC simulation of photons propagation with various energies in bone. The MC simulation was written in Fortran 77 program. Emigration of photons in bone was determined using MCNP-4C code to evaluate the results of MC method. The depth of first interaction of photons 1, 5, and 10 MeV in bone were determined in 2.26, 2.90, and 4.40 cm using the MC method, which were a good consistent with those of MCNP results 2, 3, 4 cm, respectively.