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. 2012 Jul 10;53(5):798–806. doi: 10.1093/jrr/rrs038

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© The Author 2012. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Therapeutic Radiology and 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/3.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 12. — Deviations from the planned field size of 10 cm × 10 cm and 20 cm × 20 cm over 3 months. The X axis shows the time of measurement. Each symbol shows deviation from the planned field size in mm for energy levels of of 6 and 10 MV, field size of 10 cm × 10 cm and 20 cm × 20 cm, respectively. Arrows indicate MLC calibration periods.