So recently the TSA has began to use new 3D scanners that are more equivalent to CAT scans than th currently used X-Rays, wich can quickly be cluttered by layers of clothing, or be altogether blocked by laptops or tablets. The new scanners can actually detect and eliminate from the image soft items like clothing, candy bars, and those sorts of things. And software can be incorporated to detect and highlight shapes or objects like weapons or cans, they can eaven be able to tell the difference between gells and liquid so restrictions on carrying liquid could be loosened at some point.
Curentely they are only in use at select airports, like Boston, Phoenix, Dulles, JFK, and a few others.
These systems can actually increase speeds by up to 25% because they are able to scan faster and threats can be found quicker. Hopefully this can also help their dismal rates of finding items.