Just prior to the 1982 Annual Meeting of the European Thyroid
Association in Brussels, a number of outstanding experts in the field of
X-ray fluorescence gathered at the Academisch Ziekenhuis of the Free
University of Brussels in a joint effort to more clearly define the
actual place and value of the latest newcomer among the techniques
available for the in vivo assessment of thyroid function. It is the
merit of Prof. M. Jonckheer to have organised this meeting and to have
made available the work presented there to a larger public in the form
of this monograph. Both, the meeting and the written accounts thereof
are greatly appreciated by all thyroidologists who care for properly
defining the genuine value of X-Ray fluorescence in scientific research
and in clinical management of thyroid disorder. Three main conclusions
can be drawn from the work presented 1. X-ray fluorescence has become a
safe, convenient and reliable tool for measuring intrathyroidal iodine
stores in vivo with an inter-assay reproducibility estimated at roughly
10% 2. X-ray fluorescence, used by expert hands, is a highly interesting
tool to follow changes of intra thyroidal iodine stores in time,
subsequent e. g. to the exposure of the thyroid gland to excess iodine
3. In contrast, no definite place of X-ray fluorescence as a technique
in routine assessment of thyroid disease is yet at the horizon This
latter conclusion may appear somewhat disappointing.