Table 1.

The optimization objectives used in the study

Structure	Objective	Weighting factor
GTV	Min dose > 58	3000
PTV	Min dose > 57	3000
	Max dose < 63
Left lens	Max dose < 5	1
Right lens	Max dose < 5	1
Left opticus	Max dose < 5	1
Right opticus	Max dose < 5	1
Chiasma	Max dose < 50	1
Brain stem	Max dose < 60	1
Pituritary gland	Max dose < 40	1
External	Surrounding dose falloff: 60 to 30 Gy in 10 mm	1000