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. 2016 Nov 3;58(3):378–385. doi: 10.1093/jrr/rrw103

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© The Author 2016. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Radiation Oncology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the originalwork is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Fig. 6. — Collimator size distributions with respect to the total number of beams per group (a). The horizontal axis represents the fixed collimator diameter, and the vertical axis indicates the number of beams per group (percentage). Similarly, the dose contribution to the total dose prescription is shown for each treatment plan (b). The horizontal axis represents the relative position of the beam path to the reference point. Black bars represent one standard deviation from the mean dose contribution. SPE: group with smaller potential errors; LPE: group with larger potential errors.