Passengers can be screened using imaging technology only if they can stand still with their arms above their heads for 5-7 seconds without the support of a person or device. Similarly, passengers can be screened using walk-through metal detectors only if they can walk through on their own. If a passenger cannot do so, he or she should inform a Transportation Security Officer before screening begins.

A passenger can request to be screened by imaging technology if it is available or can request to be screened using a thorough patdown, but cannot request to be screened by a metal detector in lieu of imaging technology or a patdown.