To require the Under Secretary for Science and Technology in the Department of Homeland Security to contract with an independent laboratory to study the health effects of backscatter x-ray machines used at airline checkpoints operated by the Transportation Security Administration and provide improved notice to airline passengers.

Directs the Under Secretary for Science and Technology in the Department of Homeland Security (DHS) to arrange for an independent study of the effects on human health caused by the use of backscatter x-ray machines at airline checkpoints operated by the Transportation Security Administration (TSA).

Directs the TSA Administrator to ensure that large, readable signs or equivalent electronic displays are placed at the front of airline passenger check points where backscatter advanced imaging technology machines are used for screening to inform airline passengers that they may request undergoing alternative screening procedures.