But Carol, the TSA answered that:
Do they save the scanned images?
"There is no storage capability. No cameras, cellular telephones, or any device capable of capturing an image is permitted in the remotely-located resolution room. Use of such a device is a terminable offense."
Now, they wouldn't lie now would they? I mean, there have been no cases of abuse by them to date, so why should we worry? /sarcasm
I know you're being sarcastic, but I'll be serious for a moment.
Algorithm detection (which is used for more than just threat detection) can be an ugly business. If the algorithm is too loose, that can lead to a false match. If the algorithm is too tight, this can miss a legitimate match. Detection algorithms are never static, they are always being improved by humans. Saving usage data makes for better algorithms, because real life isn't always like the lab.
Most of the backscatter devices are built by a Mass. based company called American Science and Engineering, which is commonly referred to as ASE or AS&E. Their most popular family of devices is called the "Backscatter Z".
This particular datasheet is for the cargo scanner, but I suspect there is little variation other the physical platforms (conveyor belt, etc) that transports the subjects through the scanner. Decide for yourself what capabilities these machines have.
http://goldenepochlimited.com/ZPORTAL_022006_g.pdf
ASE Inspection Features:
Mark and Annotate: Attaches pointers and comment fields to images
Database Function: Provides ability to create records relating to
specific scans
Full Save: Automatically saves the current image to hard disk when its
accompanying database record is saved
Archive: Manually saves stored image files on a CD-RW disk, and creates
a reference to the disk in the database
Export Image: Provides capability to export “what-you-see-is-what-you-get”
(WYSIWYG) images into TIF/JPEG formatted files
AS&E Image Simulator (AIS) Software (Optional): Allows user to view and
manipulate images on a stand-alone PC
RAID Drive (Optional)
Manifest Display (Optional): For manifest verification
Networking Capability (Optional): To a central server