Fig. 4.

Box-whisker comparison of sphere number (top left), violation number (top right) and sphere placement time (bottom) between clinicians (including two dosimetrists and physicist) and script. Red denotes median values, blue boxes are inter-quartile ranges, and dashed black lines are entire ranges. Sphere numbers do not include manually-removed spheres for two cases, as discussed in text. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)