MONTE CARLO SIMULATION FOR EVALUATION OF DOSE DISTRIBUTION IN PROTON THERAPY

This paper presents dose calculation in proton therapy using Monte Carlo method and comparison with experimental data obtained at TOHOKU University's cyclotron and isotope center in Japan. In this way, two Monte Carlo codes, FLUKA and MCNPX, has been employed to calculate percentage depth dose, lateral dose profiles, isodose curves and secondary particles production for proton pencil and broad beam in PMMA phantom. By going deeply through and showing the accuracy of the data the capability of Monte Carlo method in proton therapy modeling has been demonstrated. Our results reveal a good agreement between simulated and measured dose which are 3% differences for the maximum dose. The results presented herein shows the applicability of Monte Carlo models for predicting and evaluating the dose distribution in proton therapy. Also, despite differences in algorithm and atomic and nuclear library between MCNPX and FLUKA, these two codes showed good consistency.