From CBC News:
Passengers virtually stripped naked by 3-D airport scanner
The airport in Kelowna, B.C., will be the first in Canada to test a new type of passenger scanner that creates a three-dimensional image of people's bodies.

The new body imager unveiled on Thursday uses high frequency electromagnetic waves known as millimetre waves to create a detailed 3-D image of what a person looks like underneath their clothes.


The security guard operating the machine only sees a simplified image on a computer screen that indicates where ceramic weapons and plastic explosives or other suspicious items might be concealed.

But in a separate, private room, another officer sees the full detailed black and white image of the person's body. read