Medical electrical equipment. Particular requirements for the basic safety and essential performance of gamma beam therapy equipment|Electrical medical equipment, Marking, Graduations, Medical radiology, Design, Electrical safety, Testing conditions, Radiology apparatus (medical), Identification methods, Radiotherapy, Direction of movement, Components, Gamma-ray apparatus, Medical equipment, Instructions for use, Electrical equipment, Radiology, Radiation protection, Safety engineering, Electronic equipment and components, Radiation hazards, Environment (working), Control devices, Accident prevention, Documents, Signal devices, Therapeutics, Safety measures