Study of radiation dose distribution for 6MV photon beam product from VARIAN IX linac in case of large fields using BEAMnrc and DOSXYZnrc codes

Authors

  • Haitham Jbaili Tishreen University
  • Mohamed Abdel Hakim Badwi Tishreen University
  • Ayham Almahmoud Tishreen University Hospital
  • Melad Mhrez Tishreen University

Abstract

Monte Carlo model of 6MV photon beam output profile of Varian ix linear accelerator was validated by comparing computed Percentage Depth Dose and Dose Profile curves with measured TPS curves. Monte Carlo calculation method is the most accurate for calculating dose in radiotherapy. In this paper, BEAMnrc code was used to model the head of linear accelerator and simulate photon beam, and DOSXYZnrc code to calculate absorbed dose within phantom. percentage depth dose (PDD) and dose profile distribution curves (6 MV) were calculated for large fields 25 × 25 cm2, 30 × 30 cm2 and 35 × 35 cm2. BEAMnrc and DOSXYZnrc were used to perform all dose calculations in this paper. PDD calculated using Monte Carlo was compared with values ​​calculated using Treatment Planning System (TPS). Good agreement was found between PDD computed using Monte Carlo simulation and the TPS calculation with a maximum dose difference of 4.3% for PDD and 3.55% for the dose profile curves. The results showed that the different components of simulated linear accelerator were precisely modeled using Carlo death simulation. In conclusion, BEAMnrc and DOSXYZnrc codes package has very good accuracy in calculating dose distribution of 6 MV photon package and can be considered as a promising method for calculating patient dose.

Author Biographies

Haitham Jbaili, Tishreen University

Professor ,Department of Physics, Faculty of Science

Mohamed Abdel Hakim Badwi, Tishreen University

Professor ,Department of Chemistry, Faculty of Science

Ayham Almahmoud, Tishreen University Hospital

Radiotherapy Division - Oncology Center

Melad Mhrez, Tishreen University

Master Student, Department of Physics, Faculty of Science

Published

2022-01-15

How to Cite

1.
Jbaili H, Badwi MAH, Almahmoud A, Mhrez M. Study of radiation dose distribution for 6MV photon beam product from VARIAN IX linac in case of large fields using BEAMnrc and DOSXYZnrc codes. TUJ-BA [Internet]. 2022Jan.15 [cited 2022May16];43(6):125-40. Available from: http://journal.tishreen.edu.sy/index.php/bassnc/article/view/11515