Combined confocal X-ray fluorescence and X-ray computerised tomographic system and method

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United States of America Patent

PATENT NO 9739729
SERIAL NO

14425573

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Abstract

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A correlative evaluation of a sample (104) using a combined x-ray computed tomography (CT) and x-ray fluorescence (XRF) system and the method for analyzing a sample (104) using x-ray CT and XRF is disclosed. The CT/XRF system (10) includes an x-ray CT subsystem (100) for acquisition of volume information and a confocal XRF subsystem (102) for characterization of elemental composition information. Geometrical calibration is carried out between the XRF subsystem (102) and the X-ray CT subsystem (100) such that a region of interest defined during X-ray CT acquisition can be retrieved by the XRF subsystem (102) for a subsequent XRF acquisition. The system (10) combines the sub-micrometer spatial resolution 3-D imaging capability of x-ray CT with the elemental composition analysis of confocal XRF to provide 3-D elemental composition analysis of a sample (104) with ppm level sensitivity. This is applicable to many scientific research and industrial applications, a prime example of which is the elemental identification of precious metal grains in crushed and ground ores and floatation tailings in the mining industry.

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Patent Owner(s)

  • CARL ZEISS X-RAY MICROSCOPY, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Feser, Michael Orinda, US 35 794
Seshadri, Srivatsan San Ramon, US 18 509

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