The provision 0f high-Quality health care is the goal of al to l medical service, In the case of diagnostic radiological facilities, Patient selection,the conduct of the examination,and the interpretation of the results can all have an impact on the achievement of the goal. Wth respect to the conduct of the examination,it has been increasingly recognized that Quality assurance programmes directed at equipment and operator performance can be of great value in improving the diagnostic information content, reducing radiation exposure, reducing medical costs, and improving departmental management.Quality assurance programs thus contribute to the provision 0f high-Quality health care.