Microsoft Word - RadBio_Programme_ParisSept2017_verAug31

1372-1373 / 2063

• Question 5: Which dose may be delivered to the
rectum in the 4 remaining fractions to not exceed
Rectum Dmax? (α/β is assumed to be 3 for late toxicity)
• Given: Fraction 1(Rectum) Tolerance (Rectum)
- Dmax = 9,5 Gy - Dmax = 42 Gy
- n = 1 - n = 5
- d = 9,5 Gy - d = 8,4 Gy
Prostate cancer case