Epilation (hair loss) is a potential radiation effect; at what dose is it expected to occur?

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Multiple Choice

Epilation (hair loss) is a potential radiation effect; at what dose is it expected to occur?

Explanation:
Hair loss from radiation is a deterministic skin effect that appears only after crossing a dose threshold. Hair follicles in the skin are particularly sensitive, and when the local skin dose reaches about 3 Gy, damage to these follicles leads to epilation. Below this threshold, hair loss isn’t typically expected; above it, epilation occurs, often within days to weeks after exposure. So the onset is around 3,000 milligray (3 Gy): lower doses won’t cause it, while higher doses will trigger it (with possible increasing severity and other skin injuries at higher levels).

Hair loss from radiation is a deterministic skin effect that appears only after crossing a dose threshold. Hair follicles in the skin are particularly sensitive, and when the local skin dose reaches about 3 Gy, damage to these follicles leads to epilation. Below this threshold, hair loss isn’t typically expected; above it, epilation occurs, often within days to weeks after exposure. So the onset is around 3,000 milligray (3 Gy): lower doses won’t cause it, while higher doses will trigger it (with possible increasing severity and other skin injuries at higher levels).

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