Figure 4
From: Dosimetric robustness against setup errors in charged particle radiotherapy of skull base tumors
Population frequency histograms of variations in dosimetric indices for all simulated setup errors and different optimization modalities. Frequency histograms of the observed CTV Δ V95%, CTV Δ HI and OAR Δ D(near-)max comparing LR treatment plans with different optimization modalities (uc, mc and sc) for (a) carbon ions and (b) protons. Abbreviations: CTV – clinical target volume, OAR – organ(s) at risk, LR – lateral-opposed beam setup, uc – unconstrained mode, sc – single-field modulation, mc – multiple-field modulation.