Fig. 4From: A knowledge-based intensity-modulated radiation therapy treatment planning technique for locally advanced nasopharyngeal carcinoma radiotherapyA comparison of dose volume histograms for the automated plan (solid line) and the manual plan (dashed line). As one of the best plans which were both rated grade A, patient (#12) demonstrated acceptable PTV coverage and considerably greater dose sparing to both right optic lens and pituitaryBack to article page