The increasing number of experimental microwave breast imaging systems and the need to properly model them have motivated\r\nour development of an integrated numerical characterization technique. We use Ansoft HFSS and a formalism we developed\r\npreviously to numerically characterize an S-parameter- based breast imaging system and link it to an inverse scattering algorithm.\r\nWe show successful reconstructions of simple test objects using synthetic and experimental data. We demonstrate the sensitivity\r\nof image reconstructions to knowledge of the background dielectric properties and show the limits of the current model.
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