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Radiation Protection Dosimetry Advance Access originally published online on February 3, 2006
Radiation Protection Dosimetry 2005 117(1-3):7-12; doi:10.1093/rpd/nci701
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

The ICRU (International Commission on Radiation Units and Measurements): its contribution to dosimetry in diagnostic and interventional radiology

A. Wambersie1,2,*, J. Zoetelief3, H. G. Menzel4 and H. Paretzke5

1 ICRU, Bethesda, USA
2 UCL University Clinics St Luc, Avenue Hippocrate, 5469, 1200, Brussels, Belgium
3 Delft University of Technology, IRI/TNO-CSD, Mekelweg 15, 2629 JB Delft, The Netherlands
4 CERN-TIS-RP, Mailbox E07010, CH 1211 Geneva 23, Switzerland
5 GSF Institüt für Strahlenschutz, D-8042 Neuherberg, Germany

* Corresponding author: wambersie{at}rbnt.ucl.ac.be

The ICRU (International Commission on Radiation Units and Measurements was created to develop a coherent system of quantities and units, universally accepted in all fields where ionizing radiation is used. Although the accuracy of dose or kerma may be low for most radiological applications, the quantity which is measured must be clearly specified. Radiological dosimetry instruments are generally calibrated free-in-air in terms of air kerma. However, to estimate the probability of harm at low dose, the mean absorbed dose for organs is used. In contrast, at high doses, the likelihood of harm is related to the absorbed dose at the site receiving the highest dose. Therefore, to assess the risk of deterministic and stochastic effects, a detailed knowledge of absorbed dose distribution, organ doses, patient age and gender is required. For interventional radiology, where the avoidance of deterministic effects becomes important, dose conversion coefficients are generally not yet developed.


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