Stochastic vs. Determinisitic Effects Flashcards
What causes stochastic effects of radiation?
Sublethal DNA damage.
What causes deterministic effects of radiation?
Cell killing.
Is there a threshold dose for stochastic effects?
No threshold dose; effect can occur at any dose.
Is there a threshold dose for deterministic effects?
Threshold dose required; occurs above the threshold.
How does dose affect the severity of stochastic effects?
Independent of dose; all-or-none response.
How does dose affect the severity of deterministic effects?
Proportional to dose; higher dose leads to more severe effects.
What is the relationship between dose and effect for stochastic effects?
Frequency increases with dose; higher dose increases risk.
What is the relationship between dose and effect for deterministic effects?
Occurs when threshold is exceeded; most individuals show effects.
Are stochastic effects caused by doses used in diagnostic radiology?
Yes.
Are deterministic effects caused by doses used in diagnostic radiology?
No.
What are examples of stochastic effects?
Radiation-induced cancer, heritable effects.
What are examples of deterministic effects?
Osteoradionecrosis, radiation-induced cataracts, skin burns.
