Microwave Radar Imaging of Heterogeneous Breast Tissue Integrating A Priori Information
Conventional radar-based image reconstruction techniques fail when they are applied to heterogeneous breast tissue, since the underlying in-breast relative permittivity is unknown or assumed to be constant. This results in a systematic error during the process of image formation. A recent trend in m...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
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| Series: | International Journal of Biomedical Imaging |
| Online Access: | http://dx.doi.org/10.1155/2014/943549 |
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| Summary: | Conventional radar-based image reconstruction techniques fail when they are applied to
heterogeneous breast tissue, since the underlying in-breast relative permittivity is unknown or assumed
to be constant. This results in a systematic error during the process of image formation. 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’s 31-element array configuration. |
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| ISSN: | 1687-4188 1687-4196 |