Fig. 4
From: Linac photon beam fine-tuning in PRIMO using the gamma-index analysis toolkit
The calculated lateral dose profile compared with measurements and its associated gamma-index (1 % /1mm) as a function of depth . The simulation is run for more than 2.75 × 108 number of histories at the beam configuration: 10.5 MeV initial electron beam energy, 0.120 MeV energy FWHM, 0.12 cm focal spot FWHM and 10 beam divergence. The gamma-index passing rate using the 1 % /1mm criteria is 93.8% while the average statistical uncertainty in the dose is 1.0%