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. 2015 Jul 8;16(4):163–180. doi: 10.1120/jacmp.v16i4.5441

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© 2015 The Authors.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Comparison of chamber data with, and without, the couch model for dose calculation. Error bars represent 1 SD in mean magnitude. The mean magnitude in percent difference with no couch model is approximately 2.5% larger for 6 MV FFF and 2.0% larger for 10 MV FFF. The maximum percent difference with no couch model was as high as 13.0%.