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Use of ionising radiation in medical imaging has grown in recent decades. In some populations, its cumulative radiation dose approaches that from all other sources combined. This radiation burden has led to concerns about cancers caused by medical imaging. However, imaging studies expose patients to considerably lower radiation doses, and different types of radiation, than those received by most individuals in populations where we have epidemiological evidence of cancer, such as atomic bomb survivors. This gap in the evidence base has led to the controversy regarding whether radiation from medical imaging is indeed harmful. A recent study by Pearce and colleagues provides epidemiological evidence that radiation …
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