Differentiation of organ dose distribution during exposure to plain film and transillumination in relation to the path of the rays

The analysis of present radiation exposure from exposure parameters with a computer program gives an orientation for the radiation burden to various organs of risk in dependence from geometric imaging parameters also for spot film radiographs taken under fluoroscopy. Recommendations for practical proceeding are derived. Considering the relation between fluoroscopy and spot film dose, minimum field size and optimum field location is important in fluoroscopy. With rare-earth-screens instead of conventional high speed screens a reduction of total dose by 27% can be achieved in conventional myelography, that was used as a model for our calculations.