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Table 1 Dose limits for organs at risk relevant for prostate radiosurgery

From: Hypo-fractionated SBRT for localized prostate cancer: a German bi-center single treatment group feasibility trial

Organ at risk Dose limit
Rectum Dmax < 38 Gy
V36Gy < 1 cm3 & < 5%
V29Gy < 15 cm3 & < 20%
V18Gy < 25 cm3 & < 50%
Bladder Dmax < 38 Gy
V36Gy < 10 cm3 & < 10%
V18Gy < 40%
Urethra Dmax < 44 Gy
Penile Bulb V30Gy < 3 cm3 & < 50%
Femoral Heads V30Gy < 10 cm3
V14,5Gy < 5%
Testicle To be blocked for passing beams
Small Bowel V30Gy < 1 cm3
V18Gy < 5 cm3
Neurovascular Bundle V38Gy < 50%
Skin (5 mm) Dmax < 30 Gy
  1. D max  = Maximum Dose, V xGy  = Volume receiving X Gy or more