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. 2021 Oct 9;41(1):223–233. doi: 10.1007/s10067-021-05949-4

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© The Author(s) 2021

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Fig. 4 — Artefacts observed on dual energy computed tomography scans of two patients. A Motion artefacts causing a false positive colour-coded DECT image. Non-colour-coded images acquired at 150 kV demonstrate streaking and blurring. The gout analysis software misinterprets these motion artefacts as MSU depositions (long arrows) on colour-coded images. B Nailbed artefacts (short arrows) causing another false positive result in another patient most likely due to similar dual energy indices of monosodium urate crystals and keratinous nails