What technology is utilized for scanning passengers and their belongings?

Millimeter wave scanners are utilized for scanning passengers and their belongings due to their ability to detect both metallic and non-metallic objects. This technology emits low-energy millimeter wave radiation that can penetrate clothing and provide a visual image of potential threats without the need for physical contact. The advantage of millimeter wave scanning is its effectiveness in identifying concealed items, including weapons and explosives, while being safe for use on humans.

In contrast, while X-ray machines are commonly used for baggage scanning and can identify items within luggage, they are not specifically designed for scanning individuals. Metal detectors are effective for detecting metal objects but have limitations in identifying non-metallic threats. Ultrasound scanners, on the other hand, are typically used in medical settings rather than in security scanning at airports. Therefore, millimeter wave scanners are the most suitable technology in aviation security for thorough screening of passengers and their belongings.