Method and devices for assessing the threat status of an article at a security check point

摘要: A method for performing security screening at a checkpoint is provided. The includes providing an X-ray imaging system having scanning area and supporting device articles to be scanned in the area, wherein has least two reference areas manifesting respective signatures when exposed X-rays, being distinguishable from one another. further placing article on device, introducing while supported by using deriving of obtaining image area. derive attenuation information determining if threat.