Fig. 1

The dose distributions for one representative patient on coronal planes of manual and KBP plans are shown in (a) and (b) for one beginner planner, (e) and (f) for one junior planner and (i) and (j) for one senior planner, respectively. (c), (g) and (k) display the dose differences between (a) and (b), (e) and (f) and (i) and (j), respectively. The dose-volume histograms are shown for (d) one beginner planner, (h) one junior planner and (l) one senior planner