DocumentCode :
656026
Title :
A comparison of beamforming methods for microwave breast cancer detection in homogeneous and heterogeneous tissue
Author :
Moll, Jonas ; Kexel, Christian ; Krozer, V.
Author_Institution :
Dept. of Phys., Goethe Univ. of Frankfurt, Frankfurt am Main, Germany
fYear :
2013
fDate :
6-10 Oct. 2013
Firstpage :
1839
Lastpage :
1842
Abstract :
Currently, X-rays and ultrasound are mainly used for the detection of breast cancer. However, their application is limited for mass-screenings since X-ray mammography is based on ionizing radiation and ultrasound alone provides too low specificity. It is possible, therefore, to use low-power microwave radiation in the frequency range between 0.1 and 10GHz to localize the tumor by exploiting the dielectric contrast between malignant and healthy tissue. A major challenge for current microwave systems for breast cancer detection is given by the heterogeneity of the breast. To study the impact of tissue heterogeneity, we propose on one hand an ultrafast ray-tracing procedure for the simulation of microwave propagation in dispersive, heterogeneous media. Furthermore, we discuss the point spread functions, i.e. the theoretical imaging perfomance, of four breamforming reconstruction methods, i.e. delay-and-sum, time-difference-of-arrival, beamforming based on the coherence factor and the channel ranked beamformer.
Keywords :
array signal processing; cancer; dispersive media; medical signal processing; microwave imaging; microwave propagation; optical transfer function; tumours; X-ray mammography; beamforming methods; breamforming reconstruction methods; channel ranked beamformer; coherence factor; delay-and-sum; dielectric contrast; dispersive heterogeneous media; frequency 0.1 GHz to 10 GHz; healthy tissue; heterogeneous tissue; homogeneous tissue; ionizing radiation; low-power microwave radiation; malignant tissue; mass screenings; microwave breast cancer detection; microwave propagation; microwave systems; point spread functions; theoretical imaging perfomance; time-difference-of-arrival; tissue heterogeneity; tumor; ultrafast ray-tracing procedure; ultrasound; Array signal processing; Breast cancer; Microwave imaging; Microwave theory and techniques; Tumors; MIMO radar; Microwave imaging; Signal processing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference (EuMC), 2013 European
Conference_Location :
Nuremberg
Type :
conf
Filename :
6687038
Link To Document :
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