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. 2015 Dec 18;17:366. doi: 10.1186/s13075-015-0806-z

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© Foley et al. 2015

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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Depiction of superior, axial, and medial definitions of joint space narrowing (JSN). The region shaded with dots and dashes is defined as superior JSN, the solid gray as axial JSN, and the horizontal lines as medial JSN. Figure adapted from Lanyon, et al. Ann Rheum Dis 2004;63:259-63 [36]