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. 2013 Jul 31;86(1029):20130176. doi: 10.1259/bjr.20130176

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© 2013 The Authors. Published by the British Institute of Radiology

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 Unported License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial use, distribution and reproduction in any medium, provided the original author and source are credited

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Figure 4. — Dose–volume histogram (DVH) variations owing to spot mismatching with intensity-modulated proton radiotherapy (IMPT; red band) using (a) TANGENT_ENFACE and (b) TANGENT_PAIR for the patient shown in Figure 2. The shadowed band represents the DVH variation range, and the solid line represents the DVH from the original plan. brst skin, breast skin; ip. lung, ipsilateral lung; ip. norm. brst, ipsilateral normal breast PSPB, passive scattering proton beam.