Patent ID: 7991112

Claim:
A detecting method of an article detection apparatus composed of an individual DR subsystem and an individual CT subsystem independent of the individual DR subsystem, a DR scanning on an article performed by the DR subsystem and a CT scanning on the article performed by the CT subsystem both are accomplished once the article passes through the article detection apparatus in a transmission direction, the method comprising: obtaining one group of first projection data on a ray attenuation coefficient by using the DR subsystem to project an A-layer of the article at a first single projection angle, and obtaining one group of second projection data on the ray attenuation coefficient by using the CT subsystem to project the A-layer of the article at a second single projection angle different from the first single projection angle; and judging whether the A-layer of the detected article contains a dangerous article based on the one group of first projection data and the one group of second projection data so as to obtain a first judgment on the A-layer of the detected article.