New TSA CT scanners limit size of carry-on bags, prompting checks

The TSA has begun rolling out 3-D X-ray computed tomography scanners that offer deeper imaging of luggage but feature an opening just under an inch smaller than previous machines. According to TSA spokesperson Daniel Velez, this design is required for the technology to work optimally, meaning that while bags meeting the typical 22″ × 14″ × 9″ limits will clear, larger or fully expanded carry-ons may be stopped. Velez suggested passengers double-check airline size rules, place bags in the provided bins, and leave laptops inside, as the new scanners can view them without removal.

Benefits include fewer manual bag checks and the ability to keep travel-size liquids inside containers of 3.4 ounces or less. The update follows recent TSA adjustments on items such as squishy toys and a pilot program allowing full water bottles for PreCheck travelers at select airports.