Simulation of distribution dose on proton therapy for nasopharyngeal cancer with pencil beam active scanning method using MCNP6 software

Abstract

Abstract The simulation about the scattered of dosage proton therapy on nasopharyngeal cancer was performed with a pencil beam active scanning method using MCNP6 software. The proton beam was using a monodirectional disk with a diameter of 0,5 cm. The source of radiation is directed to the cell of cancer which is in form of a cube consisting of 27 small cubicles sized 0,6 cm x 0,6 cm x 0,6 cm. The proton energy varied from 105 MeV to 110 MeV. From the simulation that had been done, the percentage of the dose received by healthy cells behind the cancer cells was 0%. Then, for irradiation with proton energy from 108 MeV to 110 MeV, the percentage of dose received by healthy cells was 0,01%, 0,57%, and 4,87%, respectively. So, from the results of this study known that the largest dose of radiation is distributed to the cells of nasopharyngeal cancer for all variations of the energy used.