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A recent trend in microwave biomedical imaging is to extract the relative permittivity from the object under test to improve the image reconstruction quality and thereby to enhance the diagnostic assessment. In this paper, we present a novel radar-based methodology for microwave breast cancer detection in heterogeneous breast tissue integrating a 3D map of relative permittivity as a priori information. This leads to a novel image reconstruction formulation where the delay-and-sum focusing takes place in time rather than range domain. Results are shown for a heterogeneous dense (class-4) and a scattered fibroglandular (class-2) numerical breast phantom using Bristol\u2019s 31-element array configuration.<\/jats:p>","DOI":"10.1155\/2014\/943549","type":"journal-article","created":{"date-parts":[[2014,11,11]],"date-time":"2014-11-11T16:06:06Z","timestamp":1415721966000},"page":"1-10","source":"Crossref","is-referenced-by-count":14,"title":["Microwave Radar Imaging of Heterogeneous Breast Tissue Integrating A Priori Information"],"prefix":"10.1155","volume":"2014","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2299-2250","authenticated-orcid":true,"given":"Jochen","family":"Moll","sequence":"first","affiliation":[{"name":"Department of Physics, Goethe University of Frankfurt, Max-von-Laue-Stra\u00dfe 1, 60438 Frankfurt am Main, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas N.","family":"Kelly","sequence":"additional","affiliation":[{"name":"Department of Physics, Goethe University 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