External and internal GATE/Geant4 dosimetric calculations on voxelized phantoms

Monte Carlo simulation employing the GATE (Geant4 Application for Tomographic Emission) code plays a crucial role in radiation transport studies for dose calculations within computational phantoms. This paper presents a set of absorbed doses calculated using computational phantom Zubal and Monte Carlo GATE code version 9.3, based on two radiation exposure configurations: external (radiological accident) and internal (using $_{}^{131}I$ radionuclide). The results were validated through comparison with previous studies employing different Monte Carlo codes (MCNP, EGS4), and the reference female computational model proposed by ICRP report 110. The findings demonstrate good agreement between GATE results for Zubal phantom and published data with MCNP and EGS4, as well as alignment with ICRP 110 reference phantom results, for both external and internal irradiation scenarios. In addition, the comparison between Zubal and ICRP 110 phantom reveals a minimal variation, attributed to inherent anatomical and geometrical disparities.