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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2014 Jul 8;89(5):1121–1128. doi: 10.1016/j.ijrobp.2014.04.051

Fig. 3.

Fig. 3

PTV size (total SI margin) versus the breathing amplitude. Above 6 mm of motion the difference in total SI expansion exceeds 5 mm between the dose-probability and ITV-based PTVs.