| 摘要 |
<p>The invention provides an inspection system for closed containers, such as luggage (101), which applies radiant energy, such as x-rays (103), to a container and receives energy which is scattered, such as by Compton scattering, by objects in the container. The received energy is measured and a three-dimentional image of the objects in the container is constructed. The container may be moved relative to a fan-shaped primary x-ray beam, which illuminates a single slice of the container at a time. For example, the container may be moved by a conveyor belt (102), or, the container may be held stationary while the x-ray tube (109) may comprise a steerable beam. A plurality of collimated x-ray sensors (107 and 108) may receive energy which is scattered, at a fixed angle for each sensor, and transmits those measurements to a processor which reconstructs the three-dimensional image and displays that image for an operator. The processor may also search for, and raise an alarm if it detects a sufficient volume of material with a mass density indicative of an explosive.</p> |
