Guidance
Medical radiation: patient doses
Typical effective doses, equivalent periods of natural background radiation and lifetime fatal cancer risks from diagnostic medical exposures.
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These tables give typical effective doses for x-rays and other diagnostic procedures.
Updates to this page
Published 4 September 2008
Last updated 28 September 2026
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Updated the UK average background dose from 2.2 mSv to 2.1 mSv.
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First published.