Patent ID: RE44766

Claim:
An X-ray radiographic method of recognition of materials in an inspected object, comprising: transmitting radiation through the inspected object in a plurality of different spectral ranges with different effective energy, wherein X-ray radiation used is quasimonochromatic, recording said radiation transmitted through the inspected object by spatially separated multi-element radiation receivers of selective sensitivity, upon each of which quasimonochromatic radiation of specified energy is directed, and recognizing the materials in the inspect ed object, according to the following method: pre-recording background signal values in the absence of the inspected object for each of said receivers under X-ray irradiation of specified energy, recording signal values obtained in X-raying of a set of test objects, normalizing the signals are normalized signal values obtained in X-raying the set of test objects with respect to said background signals to determine calibration constants, and recognizing the material by determining a radiographic reflex for the inspected object based on the recorded radiation normalized with respect to said background signals, and accounting for said calibration constants.