UWB cylindrical microwave imaging system with novel image reconstruction algorithm

Bialkowski, Marek E., Wang, Yifan, Bakar, Aslina Abu and Khor, Wee Chang (2010). UWB cylindrical microwave imaging system with novel image reconstruction algorithm. In: Proceedings of: 2010 IEEE Antennas and Propagation Society International Symposium (APS/URSI). 2010 IEEE AP-S URSI International Symposium on Antennas and Propagation and CNC/USNC/URSI Radio Science Meeting, Toronto, ON, Canada, (). 11-17 July 2010. doi:10.1109/APS.2010.5562350

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Author Bialkowski, Marek E.
Wang, Yifan
Bakar, Aslina Abu
Khor, Wee Chang
Title of paper UWB cylindrical microwave imaging system with novel image reconstruction algorithm
Conference name 2010 IEEE AP-S URSI International Symposium on Antennas and Propagation and CNC/USNC/URSI Radio Science Meeting
Conference location Toronto, ON, Canada
Conference dates 11-17 July 2010
Proceedings title Proceedings of: 2010 IEEE Antennas and Propagation Society International Symposium (APS/URSI)
Journal name 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
Place of Publication Piscataway, NJ, U.S.A.
Publisher Institute for Electrical and Electronic Engineers (IEEE)
Publication Year 2010
Sub-type Fully published paper
DOI 10.1109/APS.2010.5562350
ISBN 9781424449675
1424449677
Total pages 4
Collection year 2011
Language eng
Formatted Abstract/Summary
Recent years have shown an increased interest in using active microwave techniques to obtain internal images of various objects. A particular focus has been on the application of these techniques to detect and locate a tumour within the woman’s breast. The detection principle is that the healthy and cancerous tissues have considerably different dielectric properties in the microwave frequency region. These differences can be observed from the microwave signals propagating across the breast tissues. One of the methods to detect and locate breast cancer, which has gained a lot of attraction recently, is based on an ultra wideband radar technique involving short duration pulses. The signals collected by UWB antennas are processed to locate regions producing an unusual backscatter within the image body. The detection of an unexpected large local backscatter inside the woman’s breast, which is likely due to tumour, can be recommended for further diagnosis and eventual treatment. The technique requires an estimate of average dielectric properties of the woman’s breast. Its main challenge comes from a large signal reflection at the air-body interface which masks a smaller magnitude return signal due to a cancerous tissue.

In this paper, we apply an ultra wideband radar technique to detect and locate small cylindrical objects in a dielectric cylindrical body emulating the woman’s breast. We propose a new image reconstruction algorithm which exploits the monopulse radar principle involving a 2-element array antenna. Using the difference of two signals received by the elements of this array, the part of the signal due to a background being symmetric with respect to the axis of the array is removed. The remaining part is the signal which is due to a scattering object located in the off-axis position of the array. The acquired set of difference signals obtained for various locations of the probing antenna is suitably scaled and mapped to show an internal image of the scanned body. The operation of this system including the new image reconstruction algorithm is demonstrated via full EM simulations and experiment.
©2010 IEEE
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Created: Fri, 04 Mar 2011, 13:29:05 EST by Professor Marek Bialkowski on behalf of School of Information Technol and Elec Engineering