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J Med Screen 2011;18:163–164



Radiation exposure from medical imaging is one of the largest sources of radiation exposure to the general population, second after natural background exposures. 1 In 2008 there were 46 million medical and dental examinations performed in the UK. The mean annual dose per person from this source increased by 23 % between 1997 and 2008, 2 primarily due to the doubling in the number of computed tomography (CT) scans over that period to 3.4 million per year. The average radiation dose from a CT scan is typically ten times higher than a conventional diagnostic X-ray (0.1–10 milli-Sievert [mSv] effective dose). There is concern about the potential risk of cancer from the increasing levels of medical radiation exposure in the UK and other developed countries. Furthermore, several types of CT scans, including lung CT, coronary artery calcification CT and CT colonography, have been proposed as new screening tools. The decision to expose large numbers of asymptomatic individuals to repeated radiation exposure raises legitimate concerns. The Health Protection Agency’s Advisory Group o

Topics: Ionising Radiation commissioned a Sub-group on Solid
Year: 2013
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