Broadband Dielectric Characterization of Tumorous and Nontumorous Breast Tissues

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 meth...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2007-12, Vol.55 (12), p.2887-2893
Main Authors: Khan, U.A., Al-Moayed, N., Nguyen, N., Korolev, K.A., Afsar, M.N., Naber, S.P.
Format: Article
Language:English
Subjects:
Breast
Breast tissue
Breast tissues
Broadband
cancer detection
complex permittivity
Dielectric constant
Dielectric measurements
Dispersion
dispersive Fourier transform spectroscopy
Electrochemical impedance spectroscopy
Fourier transforms
Frequency measurement
Microwaves
millimeter wave
Millimeter wave measurements
Millimeter wave technology
Permittivity
Permittivity measurement
Spectroscopy
Submillimeter wave measurements
terahertz
Terahertz frequencies
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Summary: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.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2007.909621