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• W2134327076 abstract "We propose a conceptually new method for solving nonlinear inverse scattering problems (ISPs) such as are commonly encountered in tomographic ultrasound imaging, seismology and other applications. The method is inspired by the theory of nonlocality of physical interactions and utilizes the relevant formalism. We formulate the ISP as a problem whose goal is to determine an unknown interaction potential $V$ from external scattering data. Although we seek a local (diagonally-dominated) $V$ as the solution to the posed problem, we allow $V$ to be nonlocal at the intermediate stages of iterations. This allows us to utilize the one-to-one correspondence between $V$ and the T-matrix of the problem, $T$. Here it is important to realize that not every $T$ corresponds to a diagonal $V$ and we, therefore, relax the usual condition of strict diagonality (locality) of $V$. An iterative algorithm is proposed in which we seek $T$ that is (i) compatible with the measured scattering data and (ii) corresponds to an interaction potential $V$ that is as diagonally-dominated as possible. We refer to this algorithm as to the data-compatible T-matrix completion (DCTMC). This paper is Part I in a two-part series and contains theory only. Numerical examples of image reconstruction in a strongly nonlinear regime are given in Part II. The method described in this paper is particularly well suited for very large data sets that become increasingly available with the use of modern measurement techniques and instrumentation." @default.
• W2134327076 created "2016-06-24" @default.
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• W2134327076 date "2016-10-25" @default.
• W2134327076 modified "2023-09-25" @default.
• W2134327076 title "Solution of the nonlinear inverse scattering problem by<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>T</mml:mi></mml:math>-matrix completion. I. Theory" @default.
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• W2134327076 doi "https://doi.org/10.1103/physreve.94.043317" @default.
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