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An ultrawideband (UWB) radar-based breast cancer detection system, which is composed of complementary metal–oxide–semiconductor integrated circuits, is presented. This system includes Gaussian monocycle pulse (GMP) generation circuits, switching (SW) matrix circuits, equivalent-time sampling circuits, and a compact UWB antenna array. During the detection process, the GMP signal with the center frequency...
A study of the Ultra-Wideband (UWB) microwave imaging via the finite difference time domain method (FDTD) with perfectly matched layer absorption boundary condition (PML ABC) for detecting the early malignant tumor in the human breast is presented. In this study, the principle of the microwave imaging is presented in detail. The tumor detection in a two dimensional breast model with dispersive characteristic...
Ultra-wideband (UWB) microwave imaging is a very promising method for the early breast cancer detection physically based on the large contrast of electromagnetic parameters between the malignant tumor and the normal breast tissues. In this study, the tumor detection in a two dimensional breast model with dispersive characteristic properties of the breast organisms is carried out numerically by the...
An ultra-wideband (UWB) bow-tie antenna integrated with a balun was fabricated for breast cancer detection. The bandwidth and the center frequency of the antenna were 2.4 GHz and 4 GHz, respectively. A target which was located at the depth of 44 mm in a dielectric material was detected by confocal algorism.
Ultra-wideband (UWB) microwave imaging is a very promising method for the early breast cancer detection physically based on the large contrast of electromagnetic parameters between the malignant tumor and the normal breast tissues. In this study, the tumor detection in a two dimensional breast model with hemi-elliptical configuration is carried out numerically. The influences from the skin, breast...
A study on the Ultra-Wideband (UWB) microwave imaging for detecting the malignant tumor in the human breast is presented. The planer two-dimensional breast model is used to simulate the microwave propagation in the breast by the Finite Difference Time Domain method (FDTD). The confocal algorithm is employed to reconstruct the breast image to show the tumor information involving its size and the location...
Two-dimensional cross-section image of a dielectric target embedded in the dielectric substrate was reconstructed by confocal imaging method. The Gaussian monocycle pulse with the center frequency of 15 GHz was emitted from bow-tie antenna array which was fabricated on a Si chip, and reflected back to the antenna array. Effect of the number of antennas on the quality of images was investigated. It...
Ultrawide band (UWB) microwave imaging is a promising method for the breast cancer detection based on the large contrast of electric parameters between the malignant tumor and its surrounded normal breast organisms. In this study, the detection for a tumor which is located behind the gland is performed by the appropriate signal processing. The dispersion characteristics of the breast media are taken...
Microwave imaging is a promising method for the early-stage breast cancer detection. Recently, the reflection and scattering behaviors of the microwaves propagating in the breast have been widely simulated both in 2-dimensional and 3-dimensional configurations. In this paper, a method to create quasi 3-dimensional image from 2-dimensional simulation results by confocal algorithm is proposed. The basic...
Microwave imaging is a promising method for the early-stage breast cancer detection based on the large contrast of electric parameters between the tumor and the normal breast tissue. The tumor information can be obtained by comparing the ultra wideband signals propagating in the tumor-contained breast and tumor-free breast which used as the calibration waveform. In this study, a method of extracting...
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