International Commission on Radiation Units and Measurements (ICRU)

Commission internationale des unités et des mesures de radiation

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1925, London (UK), under the auspices of International Congress of Radiology (ICR), as International X-Ray Unit Committee. Name changed to: International Committee on Radiological Units, 1931, Paris (France); International Commission on Radiological Units, 1950, London; International Commission on Radiological Units and Measurements 1956, Geneva (Switzerland). Present name adopted 1965, Rome (Italy). Structure modified: 1962, Montreux, to permit establishment of Planning Boards and Task Groups; and 1969, Hakone, to permit establishment of Report Committees working in various Technical Areas. An international commission of International Society of Radiology (ISR).


Develop a common framework of scientific concepts based on international consensus on matters related to assessing safe and effective use of radiation; assist uniformity in reporting by developing internationally acceptable recommendations regarding quantities and units of radiation and radioactivity, procedures suitable for measuring and applying these quantities in clinical radiology, and physical data needed in applying these procedures; formulate recommendations on radiation quantities, units and measurement in the field of radiation protection.

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Knowledge management/information dissemination.


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Consultative Status

United Nations Economic and Social Council (ECOSOC) (Ros C); International Atomic Energy Agency (IAEA).

Relations with Inter-Governmental Organizations

Relations with 2 inter-governmental organizations.
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Relations with Non-Governmental Organizations

Relations with 6 non-governmental organizations.
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Members in 12 countries
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Type I Classification

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UN Sustainable Development Goals **



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* Subject classification is derived from the organization names and aims.
** UN SDGs are linked to the subject classification.

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