Fig. 4
Transversal views of the selected 60 keV monoenergetic images for six specimens, the specimens 1 and 2 are severe osteoarthritis and sample 7 moderate osteoarthritis with numbers corresponding to samples. Red circle, cartilage calcifications; yellow circle, cartilage with different thicknesses; blue circle, cartilage defects; purple circle, bone cysts of various size; green circle: osteophytes of various size