Deterministic effects are best described as which of the following?

Deterministic effects are best described as which of the following?

• A. Predictable
• B. Random
• C. Probabilistic
• D. Unpredictable

Answer: (A)

Deterministic effects are dose-dependent tissue reactions that have a threshold; once that threshold is passed, the effect will occur and its severity increases with the dose. Because the outcome and how severe it will be are determined by the amount of radiation delivered, they are predictable if you know the dose. Classic examples include skin erythema and epilation, and lens damage (cataracts) in the eye—reactions that appear only after crossing specific dose levels and become more severe with higher doses. In contrast, effects described as random or probabilistic (stochastic) do not have a fixed threshold and their occurrence is not guaranteed, only more likely as dose increases.

Deterministic effects are dose-dependent tissue reactions that have a threshold; once that threshold is passed, the effect will occur and its severity increases with the dose. Because the outcome and how severe it will be are determined by the amount of radiation delivered, they are predictable if you know the dose. Classic examples include skin erythema and epilation, and lens damage (cataracts) in the eye—reactions that appear only after crossing specific dose levels and become more severe with higher doses. In contrast, effects described as random or probabilistic (stochastic) do not have a fixed threshold and their occurrence is not guaranteed, only more likely as dose increases.