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. 2015 Apr 11;10:85. doi: 10.1186/s13014-015-0387-7

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© Zhu et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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The axial-depth–dose curves in the heterogeneous slab phantom that were obtained using the various algorithms for the 6 MV photon beam and the different field sizes: a) field size of 3 cm × 3 cm, b) field size of 10 cm × 10 cm and c) field size of 20 cm × 20 cm.