Radiation issue during percutaneous coronary interventions is an important issue for operators due to the long term stochastic risk of cancer induction, but is often under-evaluated. Many factors may be associated with the radiation dose adsorbed by operators. In particular the most important are the position taken by the operator, the use of dedicated X-ray shield and the duration of the procedure. However other factors (as operator height or the angulation of the radiation tube) might have some important effects but are often under-evaluated .