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. 2020 Sep 3;7(1):e000444. doi: 10.1136/bmjgast-2020-000444

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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.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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(A) Photograph of tethered optical coherence tomography (OCT) capsule constructed using lubricious material with a 30° proximal taper for ease of retrieval. (B) Tether markings every 5 cm indicating distance from incisors. (C) Schematic showing micromotor rotary optical scanner and other components. (D) Cartoon showing capsule travelling from gastric cardia into distal oesophagus during a pullback image acquisition. (E) Illustration showing multiple cross-sectional images acquired in rapid succession during capsule pullback to obtain volumetric data for subsurface en face and cross-sectional visualisation.