Key points are not available for this paper at this time.
The frequency and type of radiographic examinations performed, as well as the type and quantity of radiographic equipment currently available, vary from country to country, depending on the type of screening programs used and on the level of health care available. These factors are a reflection of the country's overall wealth and stage of development. In past years, the annual number of radiologic examinations performed has increased worldwide, and this trend is expected to continue. If less developed countries are unable to increase their radiologic capacity at least as quickly as their population increases, they will fall further behind in their ability to care for their citizens.
Mettler et al. (Tue,) studied this question.