Effect of tissue Inhomogeneities on dose distributions from Cf-252 brachytherapy source

The Monte Carlo method was used to determine the effect of tissue inhomogeneities on dose distribution from a Cf-252 brachytherapy source. Neutron and gamma-ray fluences, energy spectra and dose rate distributions were determined in both homogenous and inhomogeneous phantoms. Simulations were performed using the MCNP5 code. Obtained results were compared with experimentally measured values published in literature. Results showed a significant change in neutron dose rate distributions in presence of heterogeneities. However, their effect on gamma rays dose distribution is minimal.

► The effect of tissue inhomogeneities on dose distribution has been investigated.
► A comparison of our results with experimental data available in the literature is presented.
► Obtained results showed a significant change in neutron dose rate distributions.