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Survival rate for breast cancer is directly related to the stage at diagnosis, therefore clinical emphasis is on early screening and detection. Microwave radiometry is a passive imaging modality proposed for breast cancer detection without the need for ionizing radiation. Detection of breast tumor using radiometry is challenging as the intensity of the thermal radiation received by the antenna is...
A transceiver subsystem for microwave breast imaging system was designed and fabricated. The subsystem consists of a transmitter, a receiver and a 16-channel switch matrix module. The subsystem is operated in the frequency from 500 MHz to 3 GHz and has 130 dB dynamic range and 110 dB channel isolation.
Thermal interstitial microwave ablation comparison between swine breast tissue and breast phantom using a coaxial antenna was presented. Experimental protocol was composed by a radiation system and a thermometry system. Coaxial antenna works at 2.45 GHz, power apply during experiments was 10 watts for 5 minutes. Thermal sensors were placed next to the antenna, at 0.50 cm, 1 cm and 1.50 cm to the antenna...
Ultra-wideband (UWB) microwave imaging is a promising technique for detecting early stage breast cancer, which exploits the significant contrast in dielectric properties between normal and malignant breast tissues. In this paper, we have proposed a new modified compensation method and beamforming technique for microwave imaging. We used a three dimensional (3-D) Finite Integration Technique (FIT)...
In this paper, the observation of scattered fields due to dipole and circular-loop antennas for illuminating the breast are investigated. The Transverse Magnetic (TM) and Transverse Electric (TE) components of scattered fields are examined for a numerical breast phantom over the frequency range of 3-7 GHz for both circular-loop and dipole antennas. Results obtain through simulations demonstrate the...
Simulation experiment of breast cancer detection has been performed using an ultrashort-pulse radar with compact vivaldi antennas. A synthetic breast phantom and metallic balls or high-k dielectric cubes are used as tumor in our experiment. Image reconstructions of the breast models using reflection data will be presented. We measure reflection data in order to reconstruct images of the breast models...
A narrow focus ultra-wideband dielectric-filled antenna has been designed for the purpose of near-field breast cancer detection without the use of coupling media. Instead of immersing the antenna in a lossy liquid coupling medium, direct matching of the substrate and antenna to the biological tissue is proposed here. The proposed feed structure was designed on low-cost printed-circuit-board (PCB)...
A planar antenna with ultra wideband directive performance is presented. It is aimed to be part of a microwave imaging system for breast cancer detection. The antenna is designed to operate efficiently across the ultra wideband frequency (3.1 GHz to 10.6 GHz). It has a very compact size with overall dimensions of 0.9 cmtimes1 cm. The antenna is assumed to be immersed in a liquid of a high dielectric...
In recent years, pulsed microwave imaging in the gigahertz range has been suggested as a promising complementing methodology to the currently existing detection and imaging techniques. This technique is based on significant electrical contrast between the cancerous and healthy breast tissue in the microwave range. In this paper, we investigate tumor detection capabilities of the CPW-fed elliptical...
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