Prevalance of medical exposures
The breakdown of the principal sources of radiations in developed countries shows the dominance of medical contributions in the non natural exposures . The non-medical contribution is principally due to X-rays emitted by television and computer screens, radiation emitted by smoke detectors and luminous dials, and nuclear after-effects (of atomic tests, nuclear reactors and, of course, disasters such as Chernobyl. In Western Europe, this last factor accounts for less than 1% of the total exposure.)
Jean-Marc Faday (CNRS/Images-M├ędia)