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. 2019 Sep 3;20(9):61–68. doi: 10.1002/acm2.12700

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© 2019 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Setup deviation for breast cancer patients receiving tangential treatment positioned using laser‐based setup (LBS) and surface based setup (SBS). Histograms of the setup accuracy in (a) lateral, (b) longitudinal, and (c) vertical direction verified with field imaging. Reduced maximal deviations can be observed for SBS compared to LBS in all three translational directions. (d) The cumulative probability of the vector offset show a significantly improved patient setup for SBS compared to LBS (P < 0.01).