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Assessing 131I in thyroid by non-spectroscopic instruments - a European intercomparison exercise

Journal article
Authors Mats Isaksson
David Broggio
Pavel Fojtik
Anne Laure Lebacq
Juan Francisco Navarro Amaro
Jakub Ośko
Begoña Pérez López
Isabelle Vu
Paolo Battisti
Jimmy Börjesson
Marie Carlsson
Carlo Maria Castellani
Magnus Gårdestig
Peter Hill
Grażyna Krajewska
Günter Lünendonk
Oliver Meisenberg
Mats Stenström
Sokratis El Mantani Ordoulidis
Published in Radiation Measurements
Volume 128
Issue September
ISSN 1350-4487
Publication year 2019
Published at Institute of Clinical Sciences, Department of Radiation Physics
Language en
Keywords ThyroidIodine-131, Non-spectrometric, Measurements, Intercomparison
Subject categories Radiological physics


One of the issues of the Open Project for the European Radiation Research Area (OPERRA) was human thyroid monitoring in case of a large scale nuclear accident. This issue was covered in task 5.4 as project “CaThyMARA” (Child and Adult Thyroid Monitoring After Reactor Accident), which included several aspects of thyroid monitoring, e.g. screening of facilities able to perform thyroid monitoring in the European countries, dose estimation, modelling of detector response, and two intercomparison exercises. The intercomparison described in this paper focused on thyroid monitoring by non-spectrometric instruments, including gamma cameras and other instruments that were considered available for measurements made by members of the public. A total of 12 facilities from 7 European countries have participated and 43 various measuring devices have been evaluated. The main conclusion of this intercomparison is that the ability to make assessments of 131I activity in the thyroid to the exposed population after an accidental release must, on the average, be considered as good among the European laboratories taking part in this study. This intercomparison also gave the participants the possibility to calibrate the measuring devices for thyroid measurements of children where this procedure was not available before. A comprehensive report of the intercomparison is given.

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