of hypoxia imaging is obviously great, to date neither the clinical nor the scientific community at an international level has focused many research activities on the hypoxia problem. As the result of a workshop held by the Section for Radiopharmacy in Tübingen, this book collects observations and findings in order to stimulate the on-going research resulting in important clinical applications. Hypoxia imaging is needed in areas of cardiology, neurology and oncology. Additional applications are to be expected in the field of diabetes, infections and organ transplantation. Therefore, the book addresses those who are basically involved in research in radiochemistry and radiopharmacy as well as those dealing with all biological aspects and facing direct clinical applications.