Patent ID: 7440544
Filing Date: 2008-10-21
Classification: G01N,G01V,Y10S

Abstract:
1. A method for scanning a bag to determine if the bag poses a threat, the method comprising: performing a CT scan of the bag to produce CT scan data; processing the CT scan data to obtain lineogram data; determining measured values for x-ray attenuation and size of a first object in the bag based on the lineogram data; comparing the measured values to predetermined values; if the measured value is below the predetermined value for at least one of x-ray attenuation and size then determining that the object does not pose a threat and clearing the bag; else, determining the center of mass of the first object based on the lineogram data; modifying the lineogram data based on the center of mass of the first object; determining the density of the first object based on the modified lineogram data; and if the density of the first object is not a predetermined value, then determining that the first object does not pose a threat and clearing the bag.