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. 2007 May 10;8(2):76–92. doi: 10.1120/jacmp.v8i2.2350

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© 2007 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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The crossplane profile from golden beam data is shown, together with the measured data from the Tom Baker Cancer Centre (TBCC) and Cross Cancer Institute (CCI) for a 6 MV $25 \times 25$ ‐cm open field at 4 cm depth. The line indicates the location of the off‐axis profile at 80% field edge.