Exemplary axial dose distributions for four RT locations. Relative dose distribution at the isocenter plane for: a breast, b neurocranium, c lung, d prostate. The left column shows the results of FF plans and the middle column shows the results of FFF plans. The right column shows the relative dose difference FF – FFF. When defining FF plans as the gold standard, yellow isoshades indicate more dose contribution from FFF beams. Purple isoshades indicate more dose contribution from FF beams.