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. 2019 Jul 11;14:123. doi: 10.1186/s13014-019-1295-z

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© The Author(s). 2019

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. 7 — Comparison between the three model predictions. (a) RBE_α (top) and R_β (bottom) as function of LET for (α/β)_x = 2 Gy (left) and 10 Gy (right). (b) RBE as a function of LET for (α/β)_x = 2 Gy (left panel) and 10 Gy (right panel) at 2 Gy reference photon dose. (c) RBE as a function of ⁴He ion beam physical dose for (α/β)_x = 2 Gy (top) and 10 Gy (bottom) at 4 keV·μm⁻¹ and 15 keV·μm⁻¹ as shown in the left and right column, respectively