In the management of oncologic diseases, modern imaging modalities contribute heavily to the decision of which form of treatment - local or systemic, surgical or interdisciplinary - will be most efficient. The addition of functional image information to conventional staging procedures helps improve the diagnostic pathway. The information needed for therapeutic management and for follow-up can be provided by correlative imaging such as positron emission tomography (PET) and computed tomography (CT) or PET/CT. This book is a comprehensive compilation of the accumulated knowledge on PET and PET/CT in oncology, covering the entire spectrum from solidly documented indications, such as staging and monitoring of lung and colorectal cancer, to the application of PET/CT in head and neck surgery, gynecology, radiation therapy, urology, pediatrics etc. It is aimed at nuclear medicine and radiology specialists as well as physicians interested in the possibilities and limitations of PET and PET/CT in oncology.