From: Volumetric intensity-modulated Arc (RapidArc) therapy for primary hepatocellular carcinoma: comparison with intensity-modulated radiotherapy and 3-D conformal radiotherapy
OAR
Dose constraints
Normal liver
Mean dose ≤ 26 Gy
Stomach
Maximum dose ≤ 54 Gy
Kidney
At least one side of kidney ≤ 23 Gy (mean dose)
Spinal cord
Maximum dose ≤ 47 Gy
(Maximum dose of spinal cord plus 5-mm margin ≤ 45 Gy)