Radiobiology

Basic concept of radiation therapy

The radiobiology concept -effect of radiation derived from this model.

p/s: snap capture of the revision notes

Example of BOF

In Linear-Quadratic equation, if α value is 0.03, β value is 0.3, what is the survival
percentage after treatment with RT of 2Gy.
A.  15%
B.  20%
C.  28%
D.  35%
E.  80%





Answer: C

LQ model – SF= e^-(αD+βD2)

                         = e^{-(2x0.03 + 0.3 x 2 square)}

                         = 0.28