Conference Paper

Response characterization of the precision open-ended coaxial probe for dielectric spectroscopy of breast tissue

Dept. of Electr. & Comput. Eng., Calgary Univ., Alta., Canada
DOI: 10.1109/APS.2003.1220118 Conference: Antennas and Propagation Society International Symposium, 2003. IEEE, Volume: 4
Source: IEEE Xplore

ABSTRACT Large-scale dielectric spectroscopy of healthy and diseased breast tissue in the 0.1 to 20 GHz frequency range is currently underway. Open-ended coaxial probes are used as sensors to record the reflection coefficient of the tissue samples. The measured reflection coefficient is converted to the dielectric properties data through a suitable inverse technique. The collected data will aid in further advances of the microwave technology for early breast cancer detection. Thus, it is crucial to ensure the highest possible accuracy and reliability of the tissue measurements.

0 Bookmarks
 · 
51 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, millimeter wave free-space quasi-optical spectroscopy technique is applied to determine the transmittance, complex refractive index and complex dielectric permittivity over 30 GHz to 120 GHz range. The imaging procedure is based on using these data for a solvable inverse imaging reconstructing problem. An image reconstruction is achieved to give the high resolution reconstructed images of the sample over a wide frequency range.
    Microwave Integrated Circuits Conference (EuMIC), 2012 7th European; 01/2012
  • [Show abstract] [Hide abstract]
    ABSTRACT: The broadband dielectric properties of tumorous and non-tumorous tissues were analyzed at the microwave, millimeter wave, and terahertz ranges. In-vitro measurements were obtained using the coaxial probe and dispersive Fourier transform spectroscopy. Both techniques were modified to yield the complex real and imaginary permittivity, absorption coefficient, and refractive index. The results reveal the characteristic signatures of breast tissues and display a significant difference in the electromagnetic response of tumorous and non-tumorous tissues.
    Microwave Symposium, 2007. IEEE/MTT-S International; 07/2007
  • [Show abstract] [Hide abstract]
    ABSTRACT: The broadband dielectric properties of tumorous and nontumorous tissues were analyzed at the millimeter-wave and terahertz frequencies. Ex-vivo measurements were obtained using the backward-wave oscillator-based free-space quasi-optical spectroscopy and dispersive Fourier transform spectroscopy methods. Both techniques were modified to yield the real and imaginary parts of permittivity, absorption coefficient, refractive index, and transmission data over an extended frequency range from 30 to 900 GHz. Results reveal characteristic signatures of breast tissues and display a significant difference in the electromagnetic response of tumorous and nontumorous tissues. The techniques employed in this study provide prospects for extending ex-vivo measurements to in-vivo breast cancer detection and diagnostics.
    IEEE Transactions on Microwave Theory and Techniques 01/2008; · 2.23 Impact Factor