Digital radiography may be defined as an imaging system in which conventional X-rays are used, but in which conventional film-screen combinations are replaced by radiation detectors connected to computer systems to produce the image. Today, digital radiography for examination of the musculoskeletal system is routine in many departments. The systems used most for such digital radiography are based on imaging plates, using phosphor storage screens, but there are also several other systems developed or under development in which the imaging plate is no longer needed.