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Table 2 Dose-volume constraints for normal tissues

From: A phase I dose-escalation trial of stereotactic body radiotherapy using 4 fractions for patients with localized prostate cancer

Normal tissue dose-volume Constraint
Rectum
 V31 Gy 25%
 V28 Gy 40%
 V24 Gy 55%
 V20 Gy 65%
Bladder
 V28 Gy 30%
 V24 Gy 50%
Femoral head
 Maximum 28 Gy
Small intestine
 Maximum 24 Gy
  1. V volume