At what dose does Erythemia occur as a Non-Stochastic effect?

Erythemia is observed as a non-stochastic effect of radiation exposure, which is a deterministic effect characterized by a threshold dose; it does not occur until a certain level of exposure is reached. The onset of erythemia, or skin reddening, typically occurs at a dose of around 200 rems (2,000 mSv). This is important because non-stochastic effects are dose-dependent—the severity of the effect increases with the dose.

In the context of erythemia, reaching this threshold means that detectable biological effects on the skin, such as reddening, are expected to appear once the radiation dose exceeds the 200 rem threshold. The understanding of these dose levels helps in establishing safety standards and protective measures in situations involving radiation exposure, as well as informing the management of radiological practices to minimize skin damage.