Table 4. Dose-volume statistics for the normal tissues.

Critical organ	Average maximum dose (Gy)	Average mean dose (Gy)
Brain stem	56.81 (42.40-73.80)	26.85 (17.27-40.93)
Spinal cord	33.03 (22.12-42.73)	20.00 (11.69-32.88)
Pituitary gland	49.94 (24.50-63.42)	39.83 (20.64-61.05)
Optic nerve
Left	43.83 (23.40-65.10)	23.56 (9.34-46.14)
Right	45.77 (22.21-62.86)	27.29 (10.58-76.98)
Optic chiasm	42.39 (4.80-65.86)	27.58 (4.21-59.15)
Temporal lobe
Left	64.87 (48.00-75.20)	18.26 (8.07-29.86)
Right	64.72 (47.82-75.26)	18.89 (9.90-40.43)
Parotid gland
Left	65.00 (60.15-70.49)	35.33 (30.68-39.42)
Right	64.99 (57.80-68.62)	35.82 (27.31-41.61)
Temporomandibular joint
Left	48.41 (20.99-67.17)	33.76 (20.07-56.25)
Right	55.32 (43.95-70.19)	38.40 (26.63-55.88)