FIGURE 7.

Trend analysis of MLC and jaw positional accuracy. (a) Example deviation from central 28 leaves at two nominal positions. (b) Longitudinal RMSE for each MLC bank at two nominal positions. (c) Gantry dependence of RMSE for each MLC bank measured during commissioning. (d) Longitudinal maximum deviation for each MLC bank at two nominal positions. (e) Longitudinal RMSE for each jaw at the nominal position of 100 mm. (f) Gantry dependence of RMSE for each jaw measured during commissioning. Longitudinal measurements were acquired for gantry at 0°. The dependence on gantry angle is tested annually