"The aim of this proposal is to provide data on dosimetry and corresponding dose related risks when administering radiopharmaceuticals for diagnostic purposes in children and adults. The composition of the consortium ensures that contacts to other bodies such as the International Commission on Radiological Protection (ICRP), the Medical Internal Radiation Dose (MIRD) Committee of the Society of Nuclear Medicine or member state radiation protection agencies are provided in order to obtain up-to-date information on the developments in this field. In addition, data on imaging device-specific parameters and corresponding phantoms will be gathered in order to get information on potential dose reductions with emphasis on paediatric nuclear medicine procedures, and on computed tomography absorbed doses in hybrid scanners. If, as a result of the reviews, the need for additional clinical trials is identified, details for the set-up of such trials will be given. Finally, recommendations for weight-dependent minimum and maximum activities with particular emphasis on paediatric nuclear medicine will be developed. The dissemination of results will be coordinated by the European Institute for Biomedical Imaging Research (EIBIR) and undertaken with the help of the radiation protection authorities in individual member states and the European Association of Nuclear Medicine (EANM)."