Figure 1.

Box plots of gamma passing rates for pretreatment verification using (a) OCTAVIUS (2%/2 mm), (b) pretreatment trajectory log files (1%/1 mm), and (c) on‐treatment verification using trajectory log files (1%/1 mm). Results are stratified per treatment site ‐ prostate (Pros), prostate and pelvic node (PPN), and head and neck (H&N). Boxes represent median and interquartile range (IQR). Whiskers represent the spread of the data. Outliers are denoted by open circles. The effect of collimator angles $<15°$ on OCTAVIUS gamma passing rates is noted for H&N cases in Fig. 1 (a).