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. 2020 Aug 13;10(8):e038120. doi: 10.1136/bmjopen-2020-038120

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Timeline of MR protocols, recruitment phases and scanner hardware and software upgrades. The filled squares, each representing 1 month, indicate when participants were actively recruited and scanned, when the MR acquisition protocol was revised and when repeatability measurements were completed. The solid arrows indicate version changes to the scanner software with the version number indicated above each arrow. The update between DV24.0 and DV25.0 included installation of some additional hardware. The dashed arrows indicate hardware repair or changes. MR, magnetic resonance.