Most somatic effects occur beyond diagnostic radiography.

Most somatic effects occur beyond diagnostic radiography.

• A. At doses used during diagnostic radiography
• B. Beyond diagnostic radiography
• C. In middle age
• D. In old age

Answer: (B)

Somatic effects from radiation have dose thresholds, so they appear only when exposures are high enough. Diagnostic radiography uses very low doses, well below the levels that cause most deterministic tissue damages like skin changes or cataracts. The amounts needed to produce those observable effects are much greater than what a typical diagnostic exam delivers. While cancer risk (a stochastic somatic effect) can be linked to lower doses, it is probabilistic and not the same as the immediate tissue effects seen at higher doses. So, the bulk of somatic effects occurs at exposures beyond diagnostic radiography.

Somatic effects from radiation have dose thresholds, so they appear only when exposures are high enough. Diagnostic radiography uses very low doses, well below the levels that cause most deterministic tissue damages like skin changes or cataracts. The amounts needed to produce those observable effects are much greater than what a typical diagnostic exam delivers. While cancer risk (a stochastic somatic effect) can be linked to lower doses, it is probabilistic and not the same as the immediate tissue effects seen at higher doses. So, the bulk of somatic effects occurs at exposures beyond diagnostic radiography.