Verification of 3D-CRT dose distribution in ArcCheck phantom using Monte Carlo code

Abstract

3D-CRT is an advanced radiotherapy technique that minimizes radiation therapy side effects. It delivers high-energy radiation beams from multiple angles, precisely targeting the tumor and minimizing exposure to healthy tissue. Therefore, this study aims to investigate dose distribution of 3D-CRT in ArcCheck Phantom using Monte Carlo (MC) code. Prior to application, simulations were performed on a virtual homogeneous phantom made of PMMA material using the MC-based EGSnrc program at various beam angles, including 0°, 45°, 90°, 135°, 180°, and 270°, to determine the dose distribution that the target would receive. The results showed that a proper dose distribution on the phantom in the surface area. Furthermore, accumulating the dose distribution from all angles yields a maximum dose at the isocenter, which is consistent with the 3D-CRT technique. Moreover, a comparison of the MC simulation and experimental data showed a similar qualitative dose distributions indicating that the EGSnrc simulation is a valid tool for validating the radiation dose distribution process in the ArcCheck phantom .