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Mean rectum EQD2 15, EQD2 25, EQD2 35 and EQD2 50 for SIMRT and SIBIMRT techniques and for α/βoar values of 1, 2 (a) 3, 4 (b) and 6, 8 Gy (c). The black and grey colours correspond to the lower and higher α/βoar values in each subfigure. For each EQD2 the p value is indicated in the graph. (d) Mean rectum EQD2 for SIMRT and SIBIMRT techniques for α/βoar = 1, 2, 3,4, 6 and 8 Gy.
