IMPT type

Site

Minimum dose

Maximum dose

Mean dose

cGy (RBE)

%

cGy (RBE)

%

cGy (RBE)

%

SFO

CTV

84.1 ± 14.4

2.2 ± 0.4

95.1 ± 18.3

1.5 ± 0.3

71.6 ± 0.7

1.3 ± 0.0

Brainstem

3.7 ± 0.8

42.3 ± 8.6

91.6 ± 1.6

1.6 ± 0.2

48.5 ± 13.2

4.0 ± 1.7

Chiasma

54.2 ± 15.2

8.5 ± 6.0

75.6 ± 8.1

1.4 ± 0.2

74.2 ± 18.0

2.1 ± 0.5

Left optic nerve

45.4 ± 7.0

4.1 ± 1.0

67.5 ± 11.6

1.3 ± 0.2

56.3 ± 6.8

1.8 ± 0.2

Right optic nerve

20.8 ± 4.0

33.9 ± 20.0

88.7 ± 28.2

5.4 ± 2.1

53.8 ± 15.8

12.3 ± 6.0

MFO

CTV

54.0 ± 23.1

1.2 ± 0.5

96.4 ± 29.4

1.6 ± 0.5

61.4 ± 12.8

1.1 ± 0.2

Brainstem

2.4 ± 1.3

38.9 ± 14.7

81.1 ± 21.0

1.5 ± 0.4

50.3 ± 9.1

5.2 ± 0.9

Chiasma

56.0 ± 22.5

13.9 ± 7.7

68.4 ± 14.1

1.3 ± 0.3

86.6 ± 8.4

2.6 ± 0.2

Left optic nerve

40.9 ± 4.6

5.1 ± 0.9

58.4 ± 2.1

1.2 ± 0.1

60.0 ± 8.1

2.1 ± 0.4

Right optic nerve

16.7 ± 4.3

46.1 ± 21.0

114.1 ± 30.8

8.3 ± 2.6

64.8 ± 4.1

19.3 ± 5.6