Mortality of British radiologists analyzed

According to a study from England, "The precautions introduced after the first 23 years' experience of the use of x-rays for medical diagnosis proved adequate to eliminate the acute hazards of exposure, but it was much longer before it was realized that small doses that did not produce any acute effect could increase the risk of cancer. British radiologists who took up the specialty at different periods have, therefore, been studied to see if the risk has now been adequately controlled."

"Four groups have been studied starting respectively before 1921, in 1921-34, 1935-54, and 1955-77, corresponding...

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