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Airport body-scan radiation under scrutiny

Airport body-scan radiation under scrutiny 12 Nov 2010 Are body scanners at security checkpoints dangerous? Some scientists and two major airline pilots unions contend not enough is known about the effects of the small doses of X-ray radiation emitted by one of the two types of airport scanning machines. At the end of October, 189 backscatter units and 152 millimeter-wave machines were in use in more than 65 airports. The total number of imaging machines is expected to near 1,000 by the end of 2011, according to the TSA. While the TSA says the machines are safe, backscatter technology raises concerns among some because it uses small doses of ionizing radiation.