This updated edition of the book provides radiation oncologists with a structured, state-of-the-art guide to target volume delineation for all major cancer types. It provides an overview of recent advances in radiation treatment techniques and multimodal imaging for radiation treatment planning. It also offers clear and structured guidelines for the contouring of target volumes and organs at risk, taking into account the available imaging modalities including PET/CT and multiparametric MR imaging. Each chapter addresses the target volume concepts of a particular tumor type and has been written by experts in the field. Covering all major tumor entities, the book provides practicing radiation oncologists with a guide to defining target volumes based on multimodal imaging.