Patent ID: 7050530
Filing Date: 2006-05-23
Classification: A61B,G01N

Abstract:
1. A method for the spatially-resolved determination of the concentration of at least one of n elements and element combinations in an object to be examined that is composed of at least one of n elements and element combinations, the method comprising: using an X-ray installation to record, at least one of simultaneously and sequentially under the same geometric conditions, a number of digital X-ray images of at least one region of the object to be examined with the aid of m≧n different spectral distributions of at least one of the X-radiation S(E) and of the detector sensitivity D(E), in order to obtain m attenuation values μi for each pixel representing the same location in the X-ray images; and calculating the concentrations of the at least one of n elements and element combinations for at least one pixel from the respective m attenuation values μI, while taking account of known spectral absorption spectra K  where  and w