Airport Body Scanners Are Safe, Study Concludes Researchers say the dose of radiation travelers receive from the controversial backscatter scanners isn't much different than what we're exposed to "through normal daily living."
backscatter
[名][U]《物理学》後方散乱 a backscatter X-ray system
後方散乱X線装置（▼麻薬発見に使用される）.
In
physics,
backscatter (or
backscattering) is the reflection of
waves, particles, or signals back to the direction they came from. It is a
diffuse reflection due to
scattering, as opposed to
specular reflection like a mirror. Backscattering has important applications in
astronomy,
photography and
medical ultrasonography.
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