Prediction of Saturne II+ 10 MV and 23 MV photon beam output factors.
A two-variable, three-parameter formula for modified, virtual equivalent square sides has been worked out which, when incorporated into empirical output-square field size function, generates output values of rectangular fields taking into account the asymmetry of the collimating system of the Saturne II+ accelerator generating 10 MV and 23 MV photon beams.