BOISE (AP) - Transportation Safety Administration officials have started using advanced imaging technology at Boise Airport that allows security officers to look for hidden explosives and other weapons by seeing through a passenger's clothes during screening.

Officials said the three Backscatter Advanced Imaging Technology scanners that began operating Saturday use low-level X-rays over the body.

Passenger privacy is a concern, but officials said the TSA worker on the scanner cannot see the passenger, and the TSA worker screening passengers cannot see the image.

Officials also said the passenger's face is blurred in the image on the scanner, and the system can't store or transmit images.

"This machine, we can't transmit it, print it, send it, or in any way capture it for further use," TSA Spokesman Dwayne Baird said.

Still, some passengers were leery. Judy Kennedy arrived in Boise on Thursday from New York and will confront the device on her way back when she leaves in several weeks.

"So we're going to have this the first time through?" Kennedy said. "How would I know? I'm from New York! To show up and just have that, it's like, 'Aah! What are you doing?' I'm a little worried about what do you see? What do you actually see?"