Guidance

Medical radiation: patient doses

Typical effective doses, equivalent periods of natural background radiation and lifetime fatal cancer risks from diagnostic medical exposures.

• From: UK Health Security Agency
• Published: 4 September 2008
• Last updated: 28 September 2026
  Show all updates

  1. 28 September 2026

     Updated the UK average background dose from 2.2 mSv to 2.1 mSv.

  2. 4 September 2008

     First published.

Documents

Patient dose information: guidance

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These tables give typical effective doses for x-rays and other diagnostic procedures.