Nuclear medicine is the bridge between a particular clinical problern and a relevant test using radionuclides. It began as a minor technical tool used in a few branches of medicine, notably endocrinology and nephrology. However, throughout the world it has now become established as a clinical discipline in its own right, with specific training programmes, special skills and a particular approach to patient management. Although the practising nuclear medicine physician must necessarily learn a great deal of basic science and technology, a sound medical training and a clinical approach to the...