Figure 5.

Axial proton density (a), axial T₂ fat-saturated (b) and axial T₁ fat-saturated post-contrast images (c) of the distal tibia: proton density and T₂ fat-saturated images demonstrate the peripheral line of low signal intensity representing the sclerotic tissue (solid arrows) surrounding a central region of marrow oedema (dashed arrows). On T₁ fat-saturated post-contrast images, deep to the low signal sclerotic tissue, there is a circumferential band-like region of enhancement representing a zone of hyperaemia (arrowhead).