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Table 1 Recommended organ at risk dose constraints

From: Multiparametric MRI as an outcome predictor for anal canal cancer managed with chemoradiotherapy

ORGAN CONSTRAINTS: No More than
Small Bowel 195 cc above 45 Gy 1% of small bowel > 52 Gy
Femoral Head 50% above 30 Gy 35% above 40 Gy 5% above 44 Gy
Iliac Crests 50% above 30 Gy 35% above 40 Gy 5% above 50 Gy
External Genitalia 50% above 20 Gy 35% above 30 Gy 5% above 40 Gy
Bladder 50% above 55 Gy
Large Bowel 50% above 50 Gy