The Associated Press: "Americans get the most medical radiation in the world, even more than folks in other rich countries. The U.S. accounts for half of the most advanced procedures that use radiation, and the average American's dose has grown sixfold over the last couple of decades. Too much radiation raises the risk of cancer. That risk is growing because people in everyday situations are getting imaging tests far too often. ... Of the many ways Americans are overtested and overtreated, imaging is one of the most common and insidious. ... 
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