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Table 1 Dose constraints for radiotherapy plans

From: The effect of dose escalation on gastric toxicity when treating lower oesophageal tumours: a radiobiological investigation

Dose Constraints

 

Dose-volume constraints

PTV1 (50 Gy)

V95% (47.5 Gy) > 95 %

Dmax (0.1 cc) < 107 % (53.5 Gy)

PTV2 (60 Gy)

V95% (57 Gy) > 95 %

Dmax (0.1 cc) < 107 % (64.2 Gy)

Lung

Mean dose < 20 Gy

V20Gy < 25 %

Heart

Mean dose < 25 Gy

V30Gy < 45 %a

V40Gy < 30 %b

CordPRV

Dmax (0.1 cc) < 40 Gy (45 Gy permitted)

Liver

V30Gy < 60 %

Individual Kidneys

V20Gy < 25 %

StomachInc

Max dose < 60Gy

StomachOutc

Max dose < 45Gy

  1. aApplies only to 50GyRA and 60GyRA plans
  2. bApplies only to 50Gy3D plans
  3. cApplies only to 60GyRA plans