There are two screeners at any given body imaging station. One sits in a backroom looking at the image and is not be able to see the face or identify the passenger in any way. Another screener stays with the passenger and cannot see the image.
Each image displayed blurs out the image of the passenger's face, Howe added.
But she says that though the technologies are different, most passengers won't be able to make a distinction.
"They are both whole-body imaging technologies and for the passenger they are really not going to be able to see that big of a difference between the two," she said. Howe added that the TSA is considering expanding the testing of the new machines to Los Angeles International Airport and at JFK airport in New York.
With the U.S. government walking a fine line between privacy and safety post-Sept. 11, the TSA says that with two pilot programs, it is one step closer to achieving its security goals.