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Radiation Protection Dosimetry Advance Access originally published online on August 30, 2008
Radiation Protection Dosimetry 2008 131(1):67-72; doi:10.1093/rpd/ncn230
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Extremity ring dosimetry intercomparison in reference and workplace fields

M. Ginjaume1,*, E. Carinou2, L. Donadille3, J. Jankowski4, A. Rimpler5, M. Sans Merce6, F. Vanhavere7, M. Denoziere8, J. Daures8, J. M. Bordy8, C. Itie3 and P. Covens9

1 Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain
2 Greek Atomic Energy Commission, Ag. Paraskevi 15310, Greece
3 Institut de Radioprotection et de Sûreté Nucléaire, BP 17, 92262 Fontenay-aux-Roses Cedex, France
4 Nofer Institute of Occupational Medicine, St. Teresa Street 8, 90-950 Lodz, Poland
5 Bundesamt für Strahlenschutz, (BfS), Köpenicker Allee 120-130, 10312 Berlin, Germany
6 Institut Universitaire de Radiophysique Appliquée, rue du Grand Pré 1, 1007 Lausanne, Switzerland
7 Belgian Nuclear Research Centre, Boeretang 200, 2400 Mol, Belgium
8 CEA LIST Laboratoire National Henri Becquerel, CEA Saclay 91191 Gif sur Yvette Cedex, France
9 Radiation Protection Department, University of Brussels and Academic Hospital AZ-VUB, Brussels, Belgium

* Corresponding author: merce.ginjaume{at}upc.edu

An intercomparison of ring dosemeters has been organised with the aim of assessing the technical capabilities of available extremity dosemeters and focusing on their performance at clinical workplaces with potentially high extremity doses. Twenty-four services from 16 countries participated in the intercomparison. The dosemeters were exposed to reference photon (137Cs) and beta (147Pm, 85Kr and 90Sr/90Y) fields together with fields representing realistic exposure situations in interventional radiology (direct and scattered radiation) and nuclear medicine (99 mTc and 18F). It has been found that most dosemeters provided satisfactory measurements of Hp(0.07) for photon radiation, both in reference and realistic fields. However, only four dosemeters fulfilled the established requirements for all radiation qualities. The main difficulties were found for the measurement of low-energy beta radiation. Finally, the results also showed a general under-response of detectors to 18F, which was attributed to the difficulties of the dosimetric systems to measure the positron contribution to the dose.


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