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. 2018 Jul 16;13:128. doi: 10.1186/s13014-018-1072-4

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© The Author(s). 2018

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 — Screenshot of the c4D-software showing a patient surface image of a Catalyst scan (isocentre marked as point on the right chest wall); below the image, the measurements during a treatment session are depicted over time. Bars indicate the magnitude of the deviation vector in millimeter, and the bars above the time scale indicate the beam-status (on vs. off)