Why we prefer CT scanner?

    In the past ten years, with the development of science and technology and the improvement of manufacturing level, the X-ray safety inspection equipment has been widely used in airports, customs, stations, public inspection institutions, large-scale activity sites, which is of great significance to preventing and stopping explosion, shooting, murder and other cases.

    The perspective image of the X-ray baggage scanner is a projection of the object perpendicular to the X-ray plane, during the security inspection, there is also limited spatial resolution to distinguish the material stacked up in the complex background.

    X-ray computed tomography (CT) technology is an advanced non-destructive detection and assessment technology, which can obtain information about the size, shape, material and density of the inspected object, and therefore is widely used in the fields of medical, industrial and explosive detection. The CT scan holds the ray source and detector to both ends of the slip ring for multi-angle scanning of the central target object. Early CT techniques were constrained to backward reconstruction algorithms to only scan one fault information while the object remains stationary, greatly extending the detection time. However, at the end of the 20th century came the spiral CT scanning technology, which allows the sliding ring to rotate while the objects can continue to move forward, greatly improving the scanning efficiency.

    CT technology was first applied in the medical field, CT in industry did not gradually studied and applied until the 1970s, while CT technology in the security field was born in the 1990s and mainly used for the detection of explosives and drugs.The characteristic information of explosives and drugs is retained in the database in advance. During the item scanning, CT compares the measured material characteristic information with the characteristic information in the database, successfully sends the dangerous goods alarm, and realizes the intelligent analysis and alarm function.

Compared with medical and industrial CT technology, the main features of security CT are:

1.The inspected objects are complex, mostly small objects, using low-energy ray sources;

2.Structurally, using the scanning method of inspected object translation, ray source and detector rotation, the scanning speed is high

Compared with traditional X-ray security machines, the main features of security CT are:

1.There is no need to open the baggage to realize the rapid and three-dimensional imaging inspection;

2.The display content is rich, can determine the material thickness, effectively identify hidden and stacked objects;

    After nearly 30 years of development, CT has been widely used in airports and customs. Due to the wide variety of objects inspected, security check CT will focus on the identification of objects according to the mass of image quality and density analysis. In addition, rotation scanning and three-dimensional imaging can effectively distinguish the material density and effective atomic number, make accurate positioning, reduce the error recognition rate, and have obvious advantages in the Angle of explosives and drug detection, which can make up for the shortage of existing security check machines.

    With advanced data analysis technology and precise neural network structure, the combination of over a million sample image reserves and security check equipment forms an intelligent upgrade, further creating a "new mode of intelligent security inspection" to serve the public, building a safer world and make life healthier.