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. 2010 Apr 26;11(3):2–11. doi: 10.1120/jacmp.v11i3.3163

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© 2010 The Authors.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Comparison of the off‐axis profiles between the 6 MV and 18 MV photon beams at 10 cm depth. Profiles are normalized to the central axis dose measured at a depth of $d_{max}$ for their respective energy.