Diagnostic radiology: national diagnostic reference levels
Details of the national diagnostic reference levels (NDRLs), for clinicians using radiation in medicine.
Documents
Details
These tables give the national diagnostic reference levels for common X-ray examinations for patients.
NDRLs from previous years are also available:
Updates to this page
Last updated 20 November 2024 + show all updates
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Added 'National Diagnostic Reference Levels (NDRLs) from 20 November 2024'.
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Added process to generate, adopt and maintain NDRLs.
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Updated with latest mammography and adult CT NDRLs. Year of publication also added to each NDRL value.
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Updated with latest update, including change to '2b. Paediatric CT examinations'.
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Added information on new NDRLs for dental radiography, and provided archive links to previous NDRLs.
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Added new data for NDRLs.
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First published.