Chen, Y., Gunawan, E., Low, K. S., Wang, S. C., Soh, C. B. and Putti, T. C. (2008) Time-reversal ultrawideband breast imaging: pulse design criteria considering multiple tumors with unknown tissue properties. IEEE Transactions on Antennas and Propagation, 56 (9). pp. 3073-3077. ISSN 0018-926X (doi:10.1109/TAP.2008.928811)

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Abstract

Pulse design is investigated for time-reversal (TR) imaging as applied to ultrawideband (UWB) breast cancer detection. Earlier it has been shown that a suitably-designed UWB pulse may help to improve imaging performance for a single-tumor breast phantom with predetermined lesion properties. The current work considers the following more general and practical situations: presence of multiple malignancies with unknown tumor size and dielectric properties. Four pulse selection criteria are proposed with each focusing on one of the following aspects: eliminating signal clutter generated by tissue inhomogeneities, canceling mutual interference among tumors, improving image resolution, and suppressing artifacts created by sidelobe of the target response. By applying the proposed criteria, the shape parameters of UWB waveforms with desirable characteristics are identified through search of all the possible pulses. Simulation example using a numerical breast phantom, comprised of two tumors and structured clutter distribution, demonstrates the effectiveness of the proposed approach. Specifically, a tradeoff between the image resolution and signal-to-clutter contrast (SCC) is observed in terms of selection of the excitation waveforms.

Item Type:	Article
Uncontrolled Keywords:	breast cancer detection, pulse design, pulse shape, time-reversal(TR), ultrawideband (UWB) microwave imaging,
Subjects:	T Technology > T Technology (General) R Medicine > R Medicine (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering R Medicine > RG Gynecology and obstetrics
Pre-2014 Departments:	School of Engineering School of Engineering > Department of Computer & Communications Engineering
Related URLs:	Publisher Organisation
Last Modified:	27 Jan 2020 15:25
URI:	http://gala.gre.ac.uk/id/eprint/2641

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