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. 2021 Jul 27;16(10):1749–1759. doi: 10.1007/s11548-021-02456-4

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© The Author(s) 2021

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Fig. 4 — Colour maps of the medial side of specimen 1 showing a more accurate osteophyte depiction in 3D US. a Absolute error colour map for the CT-SLS comparison; b absolute error colour map for the 3D US-SLS comparison