Method and apparatus for the spatially-resolved...

Details Method and apparatus for the spatially-resolved... Method and apparatus for the spatially-resolved...

2006-05-23

2006-05-23

Bruce, David V. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S053000

Reexamination Certificate

active

07050530

ABSTRACT:
A method is proposed for the spatially-resolved determination of the concentration of n elements and/or element combinations in an object to be examined that includes these elements and/or element combinations. In the method, use is made of an X-ray installation to record 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 the X-radiation S(E) and/or of the detector sensitivity D(E), in order to obtain m attenuation values for each pixel representing the same location in the X-ray images. The concentrations of the n elements and/or element combinations are then calculated for at least one pixel from the respective m attenuation values while taking account of known spectral absorption spectra of the n elements and/or element combinations and of the m different spectral distributions of the X-radiation and/or of the detector sensitivity.

REFERENCES:
patent: 4247774 (1981-01-01), Brooks
patent: 6320931 (2001-11-01), Arnold
patent: 6836528 (2004-12-01), Reddy et al.
patent: 101 43 131 (2003-04-01), None

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