The amount of radiation absorbed by passengers during a scan by a full-body X-ray backscatter scanner is even lower than the average radiation absorbed by a person during the wait for the scanner, according to a recent research report.
The report by an independent task force commissioned by the American Association of Physicists in Medicine (AAPM), found that the full-body scanners deliver a radiation dose equal to what a standard person receives every 1.8 minutes on the ground. This is also equal to to the radiation absorbed by a person every 12 seconds during flight.
The task force found that for a standard man about 5’10” tall (178.6 cm) who weighs about 161.4 pounds (73.2 kg), a full-body scan delivered about 11.1 nanosieverts of radiation.
The radiation dose (9.4 microsieverts) received by a passenger during an average 2.84-hour plane flight, according to the report, is nearly 1,000 times that of the the dose delivered by a single full-body scan.