Fig. 9.

Convergence of the objective function for the prostate B case with 15 beams selected from 110 candidate beams. In this run, 100 individuals in 100 generations are used. The boxes represent the median and the 25th and 75th percentiles of the 100 individual objective function values at each generation. The error bars represent the range of these 100 objective values. The green dotted line shows the objective value for the preset short path and the blue dashed line shows the objective value for the body path. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)