Computational Validation of a 3-D Microwave Imaging System for Breast-Cancer Screening

The microwave imaging system currently being developed at the Technical University of Denmark is described and its performance tested on simulated data. The system uses an iterative Newton-based imaging algorithm for reconstructing the images in conjunction with an efficient method-of-moments soluti...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2009-07, Vol.57 (7), p.2105-2115
Main Authors: Rubaek, T., Kim, O.S., Meincke, P.
Format: Article
Language:English
Subjects:
Algorithms
Antenna measurements
Antennas
Applied classical electromagnetism
Applied sciences
Biomedical imaging
Breast
Breast cancer
cancer
Computational modeling
Computer simulation
Diffraction, scattering, reflection
electromagnetic scattering inverse problems
Electromagnetic wave propagation, radiowave propagation
Electromagnetism
electron and ion optics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Image reconstruction
Imaging
Iterative algorithms
Iterative methods
Mathematical models
Microwave imaging
Microwaves
Moment methods
nonlinear equations
Physics
Position measurement
Radiocommunications
Radiowave propagation
Studies
System testing
Telecommunications
Telecommunications and information theory
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Description
Summary:The microwave imaging system currently being developed at the Technical University of Denmark is described and its performance tested on simulated data. The system uses an iterative Newton-based imaging algorithm for reconstructing the images in conjunction with an efficient method-of-moments solution of the associated forward scattering problem. A cylindrical multistatic antenna setup with 32 horizontally oriented antennas is used for collecting the data. 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. This improvement is illustrated by imaging a simulated hemispherical breast model using both formulations. In addition to this, the importance of using the correct position and orientation of the antennas in the measurement system is shown by imaging the same breast model using a measurement setup in which the antennas are vertically oriented.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2009.2021879