Dose distribtuions obtained from three different algorithms with the designated number of segments in (a)–(c) Prostate1, (d)–(f) Prostate2, (g)–(i) Lung, (j)–(l) HN1, and (m)–(o) HN2 clinical data. This claims that the proposed method even with much fewer segments does not harm the critical structures. (The iso-dose lines are 40%,70%, and 100% of the prescribed dose).