Fig. 5
From: MRI of the axial skeleton in spondyloarthritis: the many faces of new bone formation
Discal high signal intensity on T1-weighted MR images. a Sagittal T1-weighted MR images of the lumbosacral spine acquired in a 45-year-old man with SpA show signal intensity (long arrows) similar to that of adipose tissue within the intervertebral disc. b Computed tomography (CT) of the same intervertebral discs show discal calcification (long arrows). Also, notice the discordance in the visibility between CT and MRI for the evaluation of anterior bridging syndesmophytes (short arrows)