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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