This work offers a unique, comprehensive, and up-to-date presentation of Medical Physics in the German-speaking world. It provides the foundation for the application of physical methods and concepts in medicine, the development of new or improved procedures for the examination and treatment of patients, as well as for the provision and use of physical methods in clinical applications. As a textbook, it supports the need for systematic medical-physical education and training of physicists working in medical institutions. The book focuses on Medical Physics in Radiology and Radiooncology and is divided into five parts: Part I covers the fundamentals of radiation physics, biostatistical methods, medical informatics, organizational and legal aspects, as well as d.