Please use this identifier to cite or link to this item: http://repository.aaup.edu/jspui/handle/123456789/1590
Title: Microwave 3D Imaging System Featuring the Phase Coherence Factor for Improved Beamforming
Authors: Rasappan, Rasammal$Other$Other
Anwar, Nik$Other$Other
Zanoon, Tareq$AAUP$Palestinian
Sew Sun, Tiang$Other$Other
Ain, Mohd. Fadzill$Other$Other
Abdullah, Mohd. Zaid$Other$Other
Keywords: Breast Cancer detection
UWB Imaging
Phase coherence factor
Delay and Sum beamforming
Issue Date: Apr-2022
Publisher: Current Medical Imaging
Abstract: This paper presents an improved radar-based imaging system for breast cancer detection that features p-slot ultrawideband antennae in a 32-array set-up. The improved reconstruction algorithm incorporates the phase coherence factor (PCF) into the conventional delay and sum (DAS) beamforming algorithm, thus effectively suppressing noise arising from the side- and gratinglobe interferences. The system is tested by using several breast models fabricated from chemical mixtures formulated on the basis of realistic human tissues. Each model is placed in a hemispherical breast radome that was fabricated from polylactide material and surrounded by 32 p-slot antennae mounted in four concentric layers. These antennae are connected to an 8.5 GHz vector network analyser through two 16-channel multiplexers that automatically switch different combinations of transmitter and receiver pairs in a sequential manner. The system can accurately detect 5 mm tumours in a complex and homogeneously dense 3D breast model with an average signal-to-clutter ratio and full-width half-maximum of 7.0 dB and 2.3 mm, respectively. These values are more competitive than the values of other beamforming algorithms, even with contrasts as low as 1:2. The proposed PCF-weighted DAS is the best-performing algorithm amongst the tested beamforming techniques. This research paves the way for a clinical trial involving human subjects. Our laboratory is planning such a trial as part of future work.
URI: http://repository.aaup.edu/jspui/handle/123456789/1590
Appears in Collections:Faculty & Staff Scientific Research publications

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