The purpose of this joint WHO/International Atomic Energy Agency (IAEA) interagency publication is to provide technical specifications for radiotherapy equipment commonly used in the treatment of cancer and itemized in the WHO Lists of priority medical devices for cancer management. This book is intended for a committee involving clinical radiation oncologists, medical physicists and biomedical engineers as well as information technology, financial and planning officers to decide which technologies should be selected. They shall also select the appropriate technology for clinical procedures to be performed safely and securely, and with good quality. The Technical specifications for radiotherapy equipment in cancer treatment presents the different options available.