Heathrow Airport recently made headlines by dropping its long-standing 100-ml liquids rule at security checkpoints. This change was made possible by new computed tomography (CT) scanners that can build a 3D model of passengers’ carry-on luggage. This innovative technology allows airport staff to spot potential risks without requiring travelers to unpack or decant liquids into tiny bottles.
The previous limit on carry-on liquids was implemented in 2006 in response to a foiled transatlantic liquid explosives plot. At that time, checkpoint scanners could only produce 2D images, making it difficult to differentiate between harmless items like shampoo and potentially dangerous substances. The 100-ml restriction was a temporary solution until more advanced scanning technology could be developed.
The new generation of CT scanners, such as Smiths Detection’s HI-SCAN 6040 CTiX, captures multiple angles of the bag by rotating an x-ray source around it. This process generates a high-resolution 3D model that allows security officers to inspect the contents of the carry-on more effectively. The scanners use automated algorithms to detect potential threats, including liquids, without requiring passengers to remove all items from their bags.
While Heathrow Airport has successfully implemented this new security protocol, other airports around the world are still using outdated scanning technology. In the United States, the Transportation Security Administration (TSA) is gradually introducing CT scanners at airports, but policy changes may take time to be implemented nationwide. Therefore, American travelers are advised to adhere to the existing 3.4-ounce limit for carry-on liquids until new security measures are standardized across all airports.
In conclusion, the advancement of CT scanning technology is revolutionizing airport security procedures and making travel more convenient for passengers. As airports continue to upgrade their security systems, travelers can look forward to a smoother and more efficient screening process in the future.
