Proceedings ArticleDOI
Analysis of a 3D microwave imaging system
Mohammad Asefi,Majid Ostadrahimi,Joe LoVetri,Lotfollah Shafai +3 more
- pp 608-609
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TLDR
In this article, a full vectorial 3D microwave imaging system consisting of three layers is analyzed numerically, which is capable of acquiring scattered fields in two different polarizations using modulated scattering technique.Abstract:
In this paper a full vectorial 3D microwave imaging system consisting of three layers is analyzed numerically. The system is capable of acquiring scattered fields in two different polarizations using modulated scattering technique. A comparison between the full system simulation and measurement data is also presented.read more
Citations
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Journal ArticleDOI
Microwave Imaging Using Normal Electric-Field Components Inside Metallic Resonant Chambers
TL;DR: In this article, a novel 3D microwave imaging approach performed within a resonant air-filled metallic chamber is introduced and investigated, which utilizes the measurements of normal electric-field components at discrete points along the metallic chamber's wall.
Journal ArticleDOI
Surface-Current Measurements as Data for Electromagnetic Imaging Within Metallic Enclosures
TL;DR: In this paper, a 3D microwave imaging method within metallic enclosures is investigated and improved using the components of the surface-current vector at receiver points on the enclosure wall as data, which is used as input to a multiplicatively regularized finite-element contrast source inversion algorithm.
Journal ArticleDOI
Use of Field-Perturbing Elements to Increase Nonredundant Data for Microwave Imaging Systems
Mohammad Asefi,Joe LoVetri +1 more
TL;DR: In this paper, a finite-element contrast source inversion algorithm is used to estimate the normal component of the electric field on the inside surface of the enclosure and the measured data are used as input to a finite element contrast source inverse algorithm.
Journal ArticleDOI
A 3-D Dual-Polarized Near-Field Microwave Imaging System
TL;DR: In this paper, a 3D dual-polarized microwave imaging system based on the modulated scattering technique (MST) is presented, which collects the magnitude and phase of the scattered field using 120 MST probes and 12 transmitter/collector antennas distributed around an object-of-interest in the near-field region.
Proceedings ArticleDOI
A novel 3D near-field microwave imaging system
TL;DR: In this paper, a novel three-dimensional microwave imaging system based on the modulated scattering technique is presented. Butts et al. used the contrast source inversion algorithm formulated using the finite element method for 3D full vectorial problems.
References
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Journal ArticleDOI
Microwave-tomographic imaging of the high dielectric-contrast objects using different image-reconstruction approaches
Serguei Semenov,A.E. Bulyshev,Aria Abubakar,V.G. Posukh,Y.E. Sizov,A.E. Souvorov,P.M. van den Berg,T. C. Williams +7 more
TL;DR: In this paper, the performance of the Newton and the multiplicative regularized contrast source inversion (MR-CSI) methods in 2D geometry and gradient and MR-CSIs in 3D geometry using high-contrast, medium-size phantoms, and biological objects was evaluated and discussed based on its performance and quality of reconstructed images.
Journal ArticleDOI
Full-Wave Three-Dimensional Microwave Imaging With a Regularized Gauss–Newton Method— Theory and Experiment
TL;DR: In this article, a modified Gauss-Newton optimization method with a computationally efficient forward solver, based on the fast Fourier transform method and the marching-on-in-source-position extrapolation procedure, is proposed for 3D full-vectorial microwave imaging.
Journal ArticleDOI
A Wideband Microwave Tomography System With a Novel Frequency Selection Procedure
Colin Gilmore,Puyan Mojabi,Amer Zakaria,Majid Ostadrahimi,Cameron Kaye,Sima Noghanian,Lotfollah Shafai,Stephen Pistorius,Joe LoVetri +8 more
TL;DR: A 2-D wideband microwave imaging system intended for biomedical imaging is described, and early inversion results show that with the frequency selection procedure applied, the system is capable of quantitatively reconstructing dielectric objects, and that the use of the wideband data improves the inversionresults over single-frequency data.
Journal ArticleDOI
Computational Validation of a 3-D Microwave Imaging System for Breast-Cancer Screening
TL;DR: It has been found that formulating the imaging algorithm in terms of the logarithm of the amplitude and the unwrapped phase of the measured signals improves its performance when compared to the more commonly used complex phasor formulation.
Journal ArticleDOI
Reconstruction of 3D objects from multi-frequency experimental data with a fast DBIM-BCGS method
TL;DR: In this article, a fast DBIM-BCGS method that combines the distorted Born iterative method (DBIM) and the stabilized biconjugate-gradient fast Fourier transform (BCGS-FFT) is used as a forward scattering method for solving the volume integral equations governing the 3D scattering problem; it provides both the predicted scattered fields due to 3D heterogeneous objects and the Frechet derivatives in the inverse scattering problem.