Daily online contour adaptation by radiation therapists 41 Figure 2 – Intraobserver relative volume differences of the Clinical Target Volume (CTV). Plots of relative volume differences for fraction 2 to 5 compared to fraction 1 for each patient separately and for all patients and fractions combined (OVERALL) for the radiation therapists (RTTs) (dark blue), Observer 1 (grey), and Observer 2 (light blue). For OVERALL, the boxplot boxes indicate the median (black horizontal bar), upper and lower quartile (vertical borders of boxes), and interquartile range (IQR). Black tails (error bars) indicate the lowest and highest value that is within the minimum and maximum value (minimum = lower quartile - 1.5 * IQR and maximum = upper quartile + 1.5 * IQR). Outliers are presented as black dots. Legend: RTTs = Radiation therapists. Obs = Observer. 2
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