Fig. 1
From: Linac photon beam fine-tuning in PRIMO using the gamma-index analysis toolkit
The calculated percent depth dose curve compared with measurements and its associated gamma-index (1 % /1mm) as a function of depth . The simulation is run for more than 2.8 × 108 number of histories at the beam configuration of 6.26 MeV initial electron beam energy, energy FWHM of 0.150 MeV, 0.15 cm focal spot FWHM and 30 beam divergence. At the 1 % /1mm acceptance criteria, the passing rate is 97.1% . The average statistical uncertainty in the dose is 1.4%