The Transportation Security Administration (TSA) will install the first advanced imaging technology (AIT) unit at Seattle-Tacoma International Airport in the US in September.
The AIT unit will project low-dose X-rays over passengers to create images that will help security personnel detect hidden explosives or threat objects.
The scanners, which cost between $130,000 and $170,000 each, will take 7 to 15 seconds to screen a passenger.
To maintain passenger privacy, TSA will make the screening optional and will not store the images.
The TSA plans to install AIT units at 48 US airports, including Spokane and Boise, Idaho.