From: Dosimetric study between a single isocenter dynamic conformal arc therapy technique and Gamma Knife radiosurgery for multiple brain metastases treatment: impact of target volume geometrical characteristics
Optic nerves
Dmax < 10 Gy
Eyes
Optic chiasm
Dmax < 8 Gy
Brainstem
V12Gy < 0.5 cc
Normal brain
V12Gy < 10 cc