DocumentCode :
2315238
Title :
Near Field UWB LCMV Imaging for Breast Cancer Detection with Entropy Based Artifacts Removal
Author :
Zhi, Wanjun ; Chin, Francois ; Chia, Michael
Author_Institution :
Inst. for Infocomm Res.
Volume :
2
fYear :
2006
fDate :
14-19 May 2006
Abstract :
In this paper, we propose a near field wideband linear constraint minimum variance (LCMV) beamforming with entropy based artifacts removal for UWB imaging in breast cancer detection. We define an entropy function in the antenna domain to measure the similarity of the different antenna signals and design a window function to eliminate the very similar artifacts at all antennas. This algorithm requires no prior knowledge about the breast and tumor, and brings no distortion to the tumor reflection. After removing the artifacts, we model the tumor as a near field region source. By applying the coherent signal subspace method, a wideband near field LCMV beamforming to the region source is developed. The output power of the beamforming forms the image of the breast with tumor embedded. Applied to 2D computed finite-difference time-domain (FDTD) data, the algorithm clearly identifies the 2 mm-diameter tumor. Simulation results also demonstrate the efficiency and robustness of the proposed algorithm
Keywords :
biomedical imaging; cancer; finite difference time-domain analysis; microwave imaging; ultra wideband antennas; 2D computed finite-difference time-domain data; antenna signals; breast cancer detection; coherent signal subspace method; entropy based artifacts removal; entropy function; near field UWB LCMV imaging; near field wideband linear constraint minimum variance beamforming; tumor reflection; window function; Antenna measurements; Array signal processing; Breast cancer; Breast neoplasms; Cancer detection; Distortion measurement; Entropy; Finite difference methods; Time domain analysis; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
Conference_Location :
Toulouse
ISSN :
1520-6149
Print_ISBN :
1-4244-0469-X
Type :
conf
DOI :
10.1109/ICASSP.2006.1660408
Filename :
1660408
Link To Document :
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