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. Author manuscript; available in PMC: 2014 Aug 15.
Published in final edited form as: Phys Med Biol. 2010 Nov 12;55(23):6987–6998. doi: 10.1088/0031-9155/55/23/S02

Figure 2.

Figure 2

The ratio of relative risk (RRR), defined as the ratio of ERR for protons (ERRproton) to that for intensity-modulated photon therapy (ERRIMRT), of the medium patient for various dose-response models. Error bars represent the uncertainty in RRR due to variations in stray radiation exposures from proton therapy and IMRT in a population of ten prostate cancer patients. The response models were LNT, linear no-threshold; LEXP(10), linear-exponential rolling off at 10 Sv; LPLAT(10), linear-plateau rolling off at 10 Sv; LEXP(40), linear-exponential rolling off at 40 Sv; and LPLAT(40), linear-plateau rolling off at 40 Sv.