A Monte Carlo model of an agility head for a 10-MV photon beam

Objective: Modelling linear accelerator (linac) photon beams using the Monte Carlo (MC) technique is presently most precise with which to calculate radiotherapy beam data. Complicated treatment plans can be achieved by Agility multileaf collimator. The focus of this study model a linac, integrated an head, EGSnrc MC code and investigate its accuracy compared actual measurements. Methodology: A 10-MV from head installed in Elekta Synergy linac was simulated BEAMnrc code. Various incident electron energies were used generate percentage depth dose curves for measurements gamma analysis (γ). Consequently, focal spot different full width half-maximums (FWHMs) tune profiles. In addition, any differences profiles further minimized angular divergences. Results: energy 9.6 MeV found represent best match measurements, where γ pass rate 100%. For profile comparisons, circular FWHM 0.45 cm divergence 0.04∘ produced Conclusion: presented reliably calculations.