Fig. 2.

Summary of target rotational uncertainties (a) and intrafraction motion (b). In (b), translational and rotational components are shown in the left and right plots, respectively. The violin plots in each subfigure delineate individual measurements (scatter points, randomly offset along the abscissa to improve visualization, n = 1329 and n = 412 in (a) and (b), respectively), probability density estimate (shaded region), mean (dashed line with ‘x’ endpoints), and median (dashed line with ‘o’ endpoints).