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. 2019 Jul 24;10:67. doi: 10.1186/s13244-019-0752-4

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — 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)