Radiobiology 2016

EQD 2 $ % & = 33.6 Considering late injury, using α/β = 3 Gy, Therefore, giving the rest of the treatment as would give equal late injury as 35 × 2 Gy. 70 – 33.6 = 36.4 Gy in 2 Gy fractions In practice, 36.4 ÷ 2 ≈ 18 (maybe 19) fractions. late = 24 4 + 3 2 + 3 ! " #