Performing renography in children with antenatally detected pelvi-ureteric junction stenosis: errors, pitfalls, controversies.

The aim of this work is to present to the reader the practical experience of three clinicians having actively participated to the publication of the guidelines on renography in children. The present publication should be considered as a practical guide. We have underlined good practice, obvious errors to avoid, common pitfalls which might be overlooked, some items for which more than one reasonable solution exists and finally a few controversial points, for which there is still no agreement and no solid evidence to resolve these issues. This paper is only focused on the aspects of acquisition and processing and will not cover the clinical aspects, namely the interpretation of the renogram in terms of renal obstruction or, more precisely, in terms of risk of renal deterioration.