Guidance

Diagnostic radiology: national diagnostic reference levels

Details of the national diagnostic reference levels (NDRLs), for clinicians using radiation in medicine.

From:
UK Health Security Agency
Published
22 January 2016
Last updated
1413 JuneOctober 2022 — See all updates

Documents

National Diagnostic Reference Levels (NDRLs) from 1413 JuneOctober 2022

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Details

These tables give the national diagnostic reference levels for common X-ray examinations for patients.

NDRLs from previous years are also available:

Published 22 January 2016
Last updated 1413 JuneOctober 2022 + show all updates

  1. Updated with latest mammography and adult CT NDRLs. Year of publication also added to each NDRL value.

  2. Updated with latest update, including change to '2b. Paediatric CT examinations'.

  3. Added information on new NDRLs for dental radiography, and provided archive links to previous NDRLs.

  4. Added new data for NDRLs.

  5. First published.