Enhanced passenger screening has arrived at Charleston International Airport, but that doesn't mean passenger privacy has departed.

Unlike the controversial predecessor scanners, new software in the Advanced Imaging Technology units identifies possible threats on the image of a generic profile, not on the actual form of individual travelers. And all the scanning is done in public view, as opposed to the previous system, which involved a reviewing officer in a separate room.

The Transportation Security Administration installed the two machines in the airport's Concourse B on Tuesday and Thursday nights last week and the system went live on Saturday. The TSA hosted media at the concourse Tuesday morning to demonstrate how the scanners work.

There is no timeline to install the scanners in narrower Concourse A, according to an airport spokeswoman.

The Columbia Airport will be getting the same scanners soon, the TSA announced this week. Myrtle Beach International was equipped with the devices last year.

The agency estimated that more than 570 of the units have been installed at about 130 U.S. airports.