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Table 1 Organ at risk dose constraints

From: A treatment planning study comparing IMRT techniques and cyber knife for stereotactic body radiotherapy of low-risk prostate carcinoma

Organ
Rectum V18 Gy <  50%
V29 Gy <  20%
V32.6 Gy <  10%
V36.25 Gy <  5%
Urinary bladder V18 Gy <  40%
V36.25 Gy <  10%
Femoral heads V14.5 Gy <  5%
  1. Abbreviations: Vx Percent of OAR volume exposed to certain radiation dose