Fig. 3.

Deviation between calculated and measured field output factors using either the parameters found in this study or the manufacturer’s recommendations. Beam model [1]: TrueBeam Tx ‐ Millennium MLC ‐ X6; Beam model [2]: TrueBeam STx ‐ 120 HD MLC ‐ X6; Beam model [3]: TrueBeam STx ‐ 120 HD MLC ‐ X6 FFF.