Basic Clinical Radiobiology 2017

Poisson Statistics: local tumor control (“cure”) Tumor Control Probability, TCP , is the probability of no surviving cells in the tumor ( i.e. x = 0 ).

TCP is therefore given by:

e − λ λ 0 0 ! = e − λ = exp − λ ( )

TCP = P ( 0 ) =

λ   is the mean number of surviving cells per tumor