Basic Clinical Radiobiology 2017

α/β = int

/slope

1 /D

d

16.5

.0606

10.95

.0457 7.35 .0340 4.88 .0256 3.14 .0199 1.90 .0164 1.08 .0144

1 /D

α/E

α/β

d

Damage from a single fraction = αd + βd 2 Total damage from n fractions, E = n ( αd + βd 2 )

E = αD + βd D

E/D = α + βd

1 /D = ( α/E) + ( β/E)d