Optimization of the calculation time in simulation using the GATE/GEANT4 Monte Carlo of radiotherapy treatment plans for small fieldsMeriem Tantaoui, Mustapha Krim, Ismail Ghazi, Zineb Sobhy, Othmane Kaanouch, Abdelkrim Kartouni and Souha SahraouiE3S Web Conf., 297 (2021) 01047DOI: https://doi.org/10.1051/e3sconf/202129701047