I would think that the Radiological Society and other experts would demand that these machines undergo third party, impartial research and testing. Like I said, I think the radiation may be as low as they say it is, but I am more concerned about the accumulation of radiation in the area and how it could disperse not just in the checkpoint but in the airport volume as well. I understand that x-rays are a form of electromagnetic wavelength but don't the parts of the machine give off particles such as beta particles that could be harmful?

Also, what would happen if one of these machines somehow malfunctioned and had a "meltdown?" (Not sure if x-ray machines "meltdown") I know that hospitals would shut down the entire radiology department if a machine were to malfunction that would compromise the safety of the people in the building.