1. MERIEM TANTAOUI - Subatomic Research and Applications Team, Department of Physics, LPMC-ERSA, Faculty of Sciences Ben Msik, Hassan University, Casablanca, Morocco.
2. MUSTAPHA KRIM - Hassan First University of Settat, High Institute of Health Sciences, Laboratory of Sciences and Health
Technologies, BP 555, 26000, Settat, Morocco.
3. ZINEB SOBHY - Subatomic Research and Applications Team, Department of Physics, LPMC-ERSA, Faculty of Sciences Ben Msik, Hassan University, Casablanca, Morocco.
4. ISMAIL GHAZI - Subatomic Research and Applications Team, Department of Physics, LPMC-ERSA, Faculty of Sciences Ben Msik, Hassan University, Casablanca, Morocco.
5. OTHMANE KAANOUCH - Hassan First University of Settat, High Institute of Health Sciences, Laboratory of Sciences and Health
Technologies, BP 555, 26000, Settat, Morocco.
6. ABDENBI EL MOUTAOUKKIL - Molecular pathology and genetics laboratory, Faculty of medicine and pharmacy, HASSAN II University,
Casablanca, Morocco.
7. ABDELKRIM KARTOUNI - Subatomic Research and Applications Team, Department of Physics, LPMC-ERSA, Faculty of Sciences Ben Msik, Hassan University, Casablanca, Morocco.
8. SOUHA SAHRAOU​I - Center Mohammed VI for treatment of cancer, Ibn Rochd University Hospital, 20360 Casablanca, Morocco.
Dose assessment in radiotherapy is a critical step in cancer treatment planning, hence the importance in the simulation of cancer treatment to have a model that is well suited to the reality of the accelerator head. In this study, the components of Varian Clinac 2100 were modeled by Monte Carlo code GATE, the source was determined and adjusted for a 6MV photon. The standard reduction variance techniques and some filters have been used to speed up computer time and to ameliorate the efficiency of the Monte Carlo method. The dose distribution ending was evaluated in the 50 x 50 x 50 cm2 water tank voxelized by 4 x 4 x 4 mm3 voxels. The dose profiles, depth dose (PDD), and isodoses of the 10 x 10 cm2 , 20 x 20 cm2 , 30 x 30 cm2 , 40 x 40 cm2 fields obtained by simulation were compared to the measured data. The result of this comparison was assessed using the gamma index, which was above 98% and 95%respectively for the dose profiles and PDD, and a deviation percentage below 2% for 98% of the coordinates. These results show an agreement of the simulated and measured dosimetric data allowing to have a model granting a simulation of treatment plans in radiotherapy using photons of 6MV close to that planning in radiotherapy servicess.
Monte Carlo, GATE/GEANT4, Linear accelerator, 6 MV photon beam, Dosimetry, Dose profile, Depth-dose.