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Table 1 Dose-volume constraints to organs at risk

From: Stereotactic body radiotherapy based treatment for hepatocellular carcinoma with extensive portal vein tumor thrombosis

Organs at risk Constraints (5 Fractions)
Liver mean dose ≤15 Gy, >700 cc
Kidney mean dose ≤12 Gy
V18 < 33%
Spinal cord maximal dose < 27 Gy
Stomach V31 < 1 cc
V20 < 3 cc
Duodenum V31 < 1 cc
V20 < 3 cc
Small intestine V31 < 1 cc
V20 < 3 cc
Colon V31 < 1 cc
V20 < 10 cc
  1. Abbreviations: Vxx = the volume or percentage of organ receiving more than the xx Gy