Radiation is not something just made in the hospital, and natural radiation far exceeds man-made sources of radiation.
Natural radiation exposure comes from cosmic radiation from the sun, terrestrial radiation from rocks and soil, and internal radiation within our own bodies from things we have eaten such as milk or water.
The radiation in food and drink comes from water, plants and animals, which receive radiation from the earth or cosmic radiation from the sun.
Annual background radiation at sea level is one-half the radiation in Denver, Colorado. Denver is at high altitude and the earth's atmosphere filters cosmic rays so that the higher one goes above sea level, the greater cosmic radiation level.
Despite the variation in background radiation, there is no increase in cancer or congenital abnormalities detected in these areas.
Medical X-rays account for only about 15 percent of the annual radiation exposure in the United States. This figure includes the radiation used in radiation therapy (high dose) and in nuclear medicine.
Depending upon the severity of a child's problem, the number and complexity of X-ray examinations needed to diagnose and determine the extent of an illness are variable.
Even with multiple and repeated chest X-ray exams or repeat cardiac catheterizations, the total dose is still small. The expected benefits of the X-rays must always outweigh any possible risk for the examination to be performed.