Table 3.

Dose-volume statistics for organs at risk.

OAR	Parameters	Mean (range)
Brain stem	D 01	49.5 (45.6–54.7)
Spinal cord	D 01	37.4 (32.1–45.5)
Optical chiasm	D 01	45.8 (30.3–53.6)
Optical nerves
L	D 01	42.8 (26.9–48.9)
R	D 01	43.9 (33.6–53.5)
Parotid gland
L	D 33	31.7 (20.2–33.9)
R	D 33	32.1 (23.5–35.7)
Temporomandibular joints
L	D 33	40.4 (37.5–45.5)
R	D 33	39.1 (30.8–42.8)

OAR: organs at risk; D _max⁡: maximum point dose; D ₀₁: maximum dose to 1% volume.