·
Stochastic effects:
o
Probability of the radiation
effects increases with dose
o
Cancer (e.g. Leukaemia);
genetic effects
o
No difference in severity after
disease occurs with increasing dose
o
No threshold dose below which
risk ceases to exist
o
Regarded as the principal
health risk form low-dose radiation
·
Deterministic effects:
o
Severity of the injury
increases with dose
o
Require much higher doses to
produce effect
o
E.g. Cataracts; erythema;
fibrosis; haemopoietic damage
o
There exists a threshold below
which the effect is not seen
