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. 2017 Jan 24;25(4):1191–1197. doi: 10.1007/s12350-017-0782-6

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© The Author(s) 2017

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.

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Conversion coefficients of the most common used LE- and ME-collimator types per vendor. Green lines denote mean values. The box plot shows median and the 1st and 3rd quartile, and the ends of the whiskers are ± 1.5 *(interquartile range)