Patent ID: 7020241
Filing Date: 2006-03-28
Classification: G01V

Abstract:
1. A method for detecting a specific material in an object using electromagnetic beams, whereby intensities of non-absorbed beams from at least three beam planes in corresponding detector arrays are measured and evaluated, said method comprising the steps of: a) generating at least a two-dimensional picture of the object from the measured intensity values; b) selecting one of the spatial regions displayed in the picture on a basis of the value of a material value, which is determined from intensity measurements, for examination; c) determining a first spatial-geometric value in the region to be examined from positional data of a two-dimensional picture and from intensity values using a stored value of a material-specific, absorption-influenced value of a suspected material; d) determining a second spatial-geometric value solely from three-dimensional geometric values, which are determined from measured intensity values; and e) comparing, directly or indirectly, the first spatial-geometric value with the second spatial-geometric value in order to determine if the suspected material is actually present.