3D X-ray Computed Tomography (3D X-ray CT)
Selected Publications ►
- Godinho, Jose R. A.; Westaway-Heaven, G.; Boone, M. A.; Renno, A. D. Spectral Tomography for 3D Element Detection and Mineral Analysis, Minerals, 11, 2021 DOI: 10.3390/min11060598
- Godinho, J. R. A.; Kern, M.; Renno, A. D.; Gutzmer, J.
“Volume quantification in interphase voxels of ore minerals using 3D imaging”, Minerals Engineering (2019)
How does it work? ►
The materials inside a sample are imaged based on the principle that each material attenuates X-rays differently, depending on its electron density. Radiographs are acquired while rotating the sample (360 degrees). The samples are then computationally reconstructed into a 3D image of the sample. Normal detectors measure the total amount of X-rays (of all energies), while our special energy sensitive detector allows to resolve the energy spectrum. This helps to identify elements with a k-edge > 23 keV (heavier than Ru).
Important to plan a scan: The resolution is inversely proportional to the field of view. Samples < 2 cm diameter are necessary to achieve the highest resolution (~4 um). Cylindrical samples are ideal but other geometries can be measured without any special treatment. The method is non-destructive.