Validation study of voxel phantom monte carlo simulations with EGSnrc C++ class library

The aim of this work is to validate an in-house tool which writes voxel phantoms input files according to EGSnrc C++ class library (egspp) for Monte Carlo simulations. This tool was developed to read a phantom binary file and write a voxel phantom input deck file according to egspp structures. For the validation of the new tool, three voxel phantoms from literature considering different levels of complexity were used. They are the DM_BRA mouse phantom, Golem anthropomorphic phantom, and Case 5 XCAT model phantom from AAPM TG 195 report. For the different cases of study, internal and external photon sources were set and the energy deposition for different source and target tissue/organs were calculated. The results showed good agreement when comparing to dose calculates obtained with other Monte Carlo codes and published in the literature. The new tool was then validated for the egspp Monte Carlo studies with voxel phantoms.