Basic Clinical Radiobiology 2017

1 /n

d 16.5 10.95

1.0 .5

.25 .125 .0625 .03125 .015625

7.35 4.88 3.14 1.90 1.08

1 /n

α/β

d

Damage from a single fraction = αd + βd  2 Total damage from n fractions, E = n ( αd + βd  2 ) E/n = αd + βd  2 1 /n = ( α/E)d + ( β/E)d  2