Abstract: Security inspection is an important means for checking contraband goods in the transportation area such as airport, customs etc. X-ray technology is widely used in the aforesaid security inspection. The use of dual energy X-ray, which can identify goods according to the classification of substances, improves the accuracy of the detection. Relevant domestic companies led by nuctech company limited conducted significant patent study in the X-ray detection area and developed the dual energy x-ray technology in depth.

Key words: X-ray, dual-energy, security inspection