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Radiology Radiotherapy c227b680

A deterministic effect

A
Has a threshold in dose but the severity of the effect is otherwise dose-independent
B
Has a threshold in dose and the severity of the effect increases with dose
C
Has no threshold in dose and the severity of the effect is a constant function of dose
D
Has no threshold in dose and the severity of the effect increases with dose
High-Yield Explanation
Deterministic effect: severity increases with dose; practical threshold; the probability of occurrence increases with dose; e.g., cataract.Stochastic effect: severity independent of dose; probability of occurrence increases with dose; no threshold; e.g., cancerReference: Eric J Hall Textbook of Radiobiology for Radiologist; 5th edition
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