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. 2016 Apr 15;43(5):2374–2386. doi: 10.1118/1.4945697

FIG. 4.

FIG. 4.

6 MV off-axis factors at the distances indicated (in cm) away from the CAX. TrueBeam FFF data and FFF reference data are aligned to the right axis and are visually separated by the vertical line. N is the number of measurements in a class.