Author Affiliations: Center for Radiological Research, Columbia University Medical Center, New York (Dr Brenner); and Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York (Dr Hricak), New York.
The average radiation dose to which persons in the United States are exposed has doubled over the past 30 years.1,2 Although the average dose from natural background sources has not changed, the average radiation dose from medical imaging has increased more than 6-fold.1,2 Medical imaging now contributes about 50% of the overall radiation dose to the US population, compared with about 15% in 1980.2
Brenner DJ, Hricak H. Radiation Exposure From Medical ImagingTime to Regulate?. JAMA. 2010;304(2):208-209. doi:10.1001/jama.2010.973