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European intercomparison on the measurement of l-131 in thyroid of adults and children.

Journal article
Authors A L Lebacq
M A Saizu
M Takahashi
Mats Isaksson
B Bravo
J Brose
L Csizmadia
P Fojtík
J Kövendiné-Kónyi
G Lünendonk
O Meisenberg
N Mosimann
J Osko
A Pantya
D Saurat
G Taba
T Torvela
Z Vagfoldi
I Vilardi
I Vu
M Youngman
P Zoriy
T Beaumont
D Franck
D Broggio
Published in Radiation Measurements
Volume 129
ISSN 1350-4487
Publication year 2019
Published at Institute of Clinical Sciences, Department of Radiation Physics
Language en
Keywords European intercomparison, Thyroid monitoring, Iodine-131, children
Subject categories Radiological physics


In case of a nuclear reactor accident affecting a large population the internal contamination of the workers and the public can be assessed through in vivo measurements. Since iodine-131 is one of the most important releases and since it is of health concern, thyroid monitoring of this radionuclide is of special interest. Intercomparisons of thyroid in vivo measurements usually focus on the adult case. Here we report about a European intercomparison exercise for spectroscopic devices. Three sets of thyroid phantoms of unknown activity were circulated, representing the following ages: 5 years-old, 10 years-old and the adult. Nineteen institutions from twelve countries in Europe took part in an intercomparison exercise. Twenty-nine measurement devices have been tested. In the adult case, 5 results were outside the acceptance criteria and 10 in the 10-years old case. In the 5 years-old case, the result was not reported for one measurement device and 11 results were outside the acceptance criteria. Devices that have been tested during this intercomparison now dispose of calibration coefficients for the three age groups.

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