This volume discusses the general background and various clinical applications of radiation therapy in the treatment of non-malignant diseases. It documents the radiobiological and physical principles of treatment and the rationale underlying the use of radiotherapy for various disorders of the CNS, head and neck, eye, skin and soft tissues, bone and joints, and vascular system. In so doing, it draws attention to and elucidates the scope for application of radiotherapy beyond the treatment of malignancies. Both the risks and the benefits of such treatment are fully considered, the former ranging from minor clinical problems to life-threatening diseases. With the assistance of many tables and figures, the extensive data from clinical studies are presented in a well-structured and informative way. Since it offers an interdisciplinary perspective, it will be of interest not only to radiotherapists but also to many other practitioners and medical specialists, e.g. orthopedists, surgeons, and ophthalmologists.