TSA’s new CT scanners may pose a problem for some carry-on bags: What to know

July 19, 2026 - 01:24

The Transportation Security Administration is rolling out advanced 3D computed tomography scanners at airport checkpoints across the country, but the upgrade might create a frustrating problem for some passengers. These new CT machines, which look similar to the large medical devices used in hospitals, allow screeners to rotate and examine a bag's contents from every angle without needing to open it. However, the technology is so sensitive that it may flag items that older X-ray machines routinely let through.

The main issue comes down to density. The CT scanners can detect objects that are too tightly packed or cluttered together, which can trigger an alert even if nothing prohibited is inside. Travelers who stuff their carry-on bags to the brim with electronics, cables, toiletries, and snacks might find themselves pulled aside for a secondary search more often. In some cases, the scanner might even reject the bag entirely, forcing the passenger to check it at the gate - a move that can cost extra fees on budget airlines.

Another potential headache involves items like large power banks or dense stacks of paperback books. While these are generally allowed, the CT scanner's detailed imaging can make them look suspicious. The TSA advises passengers to keep bags organized, remove laptops and liquids from their original spots, and avoid overpacking. For now, the rollout is gradual, but as more airports install the machines, travelers should expect a few more delays at security.