Fig. 6

Dual-energy computed tomography scan of hands in a patient with rheumatoid arthritis. Magnification on the second metacarpophalangeal joint shows a normal and smooth outline of cartilage and bone plate (short arrows) on standard grayscale series (a) and normal virtual non-calcium attenuation (b). Conversely, bone marrow edema is evident on the third metacarpophalangeal joint presenting as an extensive and ill-defined green area (long arrows). Magnetic resonance imaging by means of T2-weighted fat-saturation sequence confirmed the presence of inflammatory bone marrow edema (c). From Jans et al. [72]