Medical physics experts advice on matters related to radiation physics applied to medical exposure. They are responsible for dosimetry and the optimisation of the radiation protection of patients and other individuals subjected to medical exposure, including the application and use of diagnostic reference levels. Medical physics experts are involved in the selection of medical radiological equipment, the quality assurance including acceptance testing, the preparation of technical specifications, and the installation, design and surveillance of the medical radiological installations. They also analyse the events involving accidental or unintended medical exposures and are responsible for the training of practitioners and other staff in relevant aspects of radiation protection.