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A Discrete Dipole Approximation Solver Based on the COCG-FFT Algorithm and Its Application to Microwave Breast Imaging
Joint Authors
Hosseinzadegan, Samar
Meaney, Paul
Fhager, Andreas
Persson, Mikael
Source
International Journal of Antennas and Propagation
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-07-17
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
We introduce the discrete dipole approximation (DDA) for efficiently calculating the two-dimensional electric field distribution for our microwave tomographic breast imaging system.
For iterative inverse problems such as microwave tomography, the forward field computation is the time limiting step.
In this paper, the two-dimensional algorithm is derived and formulated such that the iterative conjugate orthogonal conjugate gradient (COCG) method can be used for efficiently solving the forward problem.
We have also optimized the matrix-vector multiplication step by formulating the problem such that the nondiagonal portion of the matrix used to compute the dipole moments is block-Toeplitz.
The computation costs for multiplying the block matrices times a vector can be dramatically accelerated by expanding each Toeplitz matrix to a circulant matrix for which the convolution theorem is applied for fast computation utilizing the fast Fourier transform (FFT).
The results demonstrate that this formulation is accurate and efficient.
In this work, the computation times for the direct solvers, the iterative solver (COCG), and the iterative solver using the fast Fourier transform (COCG-FFT) are compared with the best performance achieved using the iterative solver (COCG-FFT) in C++.
Utilizing this formulation provides a computationally efficient building block for developing a low cost and fast breast imaging system to serve under-resourced populations.
American Psychological Association (APA)
Hosseinzadegan, Samar& Fhager, Andreas& Persson, Mikael& Meaney, Paul. 2019. A Discrete Dipole Approximation Solver Based on the COCG-FFT Algorithm and Its Application to Microwave Breast Imaging. International Journal of Antennas and Propagation،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1158181
Modern Language Association (MLA)
Hosseinzadegan, Samar…[et al.]. A Discrete Dipole Approximation Solver Based on the COCG-FFT Algorithm and Its Application to Microwave Breast Imaging. International Journal of Antennas and Propagation No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1158181
American Medical Association (AMA)
Hosseinzadegan, Samar& Fhager, Andreas& Persson, Mikael& Meaney, Paul. A Discrete Dipole Approximation Solver Based on the COCG-FFT Algorithm and Its Application to Microwave Breast Imaging. International Journal of Antennas and Propagation. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1158181
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1158181