Full-body security scanners have already been deployed in the United States, Canada, the Netherlands and Italy, among other countries. Around 1,000 full-body scanners are due to be operational in U.S. airports by the end of next year.
The screening devices, also known as millimetre wave scanners, or backscatter X-rays depending on which technology they use, have raised privacy concerns as they allow authorities to see underneath clothing to the surface of the skin, although special software normally masks some parts of the body.
A study by the Los Alamos National Laboratory in the United States showed that they could also affect human DNA by interfering with processes such as DNA replication, The National said.
