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. 2006 Feb 21;7(1):1–13. doi: 10.1120/jacmp.v7i1.2042

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© 2006 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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Case of a rectangular inhomogeneity in a rectangular field of dimensions 2x and 2y. $U_{i}$ and $W_{j}$ : distances from point P to the inhomogeneity limits $x_{1}, x_{2}$ and $y_{1}, y_{2}$ . $U_{i} = x_{i} - x_{p}, W_{j} = y_{j} - y_{p}$