spectral information about atenuation in different energies of X-ray photons is obtained during data acquisition. specific properties of the calcium enable to create data set without the density added to the tissues by calcium. The calcified part of the atherosclerotic plaques are not seen neither at the curved planar reconstruction nor at the three dimensional reconstructions

pure lumen spectral processed image, Naeotom Alpha Peak, calcium removal by spectral properties, University Hospital Pilsen, Czechia

the calcium displayed on monochormatic image 60 keV, Naeotom Alpha Peak, University Hospital Pilsen, Czechia