Spectral micro-CT imaging is a unique imaging modality that allows absolute element identification through K-edge imaging. This is extremely useful for differentiating between multiple contrast agents, identifying elements in electronic components, and detecting the presence of valuable minerals in geological samples. New advances in Spectral CT augment the material identification potential of this unique technique even further, as it is now possible to extract density and effective atomic number at any point inside a sample, non-destructively. A Spectral CT scan of a set of vials filled with glycerin, water and ethylene glycol was performed. Water and ethylene glycol are difficult to differentiate with conventional micro-CT imaging as the grey value is nearly identical. In the image below the density map extracted from the spectral data is shown, allowing to differentiate between the substances in the vials based on the extracted density values.
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