As a registered radiologic technologist (X-ray tech) I want to know:What is the dose rate of these "body scanners?"
The FDA regulations state: "The safety standard limits the dose per screening to 0.25 µSv (25 µrem) reference effective dose for general-use full-body security screening systems. The annual dose limit is 250 µSv (25,000 µrem) over a 12‑month period. To exceed this annual limit an individual would have to be screened more than 1,000 times in one year. This annual dose limit is in accordance with the recommendations of the National Council on Radiation Protection and Measurements (NCRP) for the annual effective dose limit for individual members of the general public (NCRP report no. 116 Limitation of Exposure to Ionizing Radiation (1993)). NCRP’s dose limitation recommendations for the general public were made with the understanding that the general public includes special populations that are more sensitive to radiation, such as children."
When I take a radiograph, I'm doing so on a piece of equipment that is calibrated and checked by an ABR board-certified physicist on an annual basis, inspected by the state's health department annually.
I'm trained in the use of equipment producing ionizing radiation, the administration of ionizing radiation in a safe manner, using the minimal exposure required to produce a diagnostic image. My equipment has, in a location readily-visible to my patients, it's certificate that it meets State requirements.
Is there an automatic shutdown of the beam when the dose limit is reached?
If not, why?
Who, exactly, is running these machines?
Who trained them?
Who calibrated the equipment?
Were these machines calibrated by a board-certified physicist?
Are they regularly inspected and maintained?
Is the certificate of inspection and compliance readily visible to all? If not, why?
I note that in nothing I've read (and am willing to concede that I don't read everything) has the FDA stated publicly that these devices are safe. (And if anyone HAS seen that, please let me know.)
Finally, I ask "Cui bono?" Certainly not the traveling public, nor the taxpayers who are footing the tab for these devices AND the personnel to run them.