Fig. 3
From: Material analysis through X-ray attenuation decomposition in spectral computed tomography
(a–d) Abdominal CT angiography scan of a 40-year-old female patient suspected of liver adenoma. Selection of a region of interest (yellow ellipse) in the XAD graph (a) results in segmentation of all anatomical compartments containing fat (yellow overlay) in the corresponding contrast-enhanced abdomen scan (c). Selecting a line segment (magenta box) in the XAD graph (b) results in selection of all voxels containing blood mixed with high concentrations of iodine (magenta overlay in d), as can be found in the vasculature, the renal cortex, the spleen as well as a hypervascular liver tumor. (e–f) A contrast enhanced chest CT scan, where common human tissue materials are anatomically indicated in (e) and their corresponding locations in the XAD graph show up in (f): lung tissue, predominantly containing air (green), fat (yellow), muscle/soft tissue (dark blue), blood/myocardium with little iodine (red), iodinated blood (magenta), vertebral bone (cyan), cartilage (orange).
