The contents of this volume are based upon presentations made to the Second European Symposium on Radiopharmacy and Radiopharmaceuticals which was held in St. Catharine''s College Cambridge in March 1985. This meeting was organized by the Radiopharmacy Group of the British Nuclear Medicine Society under the auspices of the European Joint Committee on Radio pharmaceuticals of the ENMS / SNME. The Joint Committee acknowledges the special effort which was made by the local organizers to prepare this meeting the quality of which is undoubtedly reflected in the proceedings. The wide ranging aspects of Radiopharmacy are reflected in this volume which not only deals with specialized topics, such as aerosols and biodistribution studies, but which also deals with the professional aspects of Radiopharmacy Practice. We are of the opinion that this book complements earlier publications to give an ongoing picture of the practice of Radiopharmacy and the state of the art in Europe. As well as acknowledging the contribution of the British Radiopharmacists I would also mention the support of my co chairman Prof. Dr M.G. Woldring, the members of the Joint Committee and last but not least Mrs. M. Busker, who prepared the camera ready copy. P.H. Cox Co-ordinating Chairman European Joint Committee on Radiopharmaceuticals Rotterdam XI CCNrRIBUTORS Anderson, M.L. - Pharnacy department, London Hospital London, UK. Angelberger, P. - Osterreichische Forschungszentrum Seibersdorf GmbH, Wien, Austria. Claessens, R.A.M.J. - Department of Nuclear Medicine, St. Radboud Ziekenhuis, Nijrnegen, The Netherlands.