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  • Title: Ultrawideband temperature-dependent dielectric properties of animal liver tissue in the microwave frequency range.
    Author: Lazebnik M, Converse MC, Booske JH, Hagness SC.
    Journal: Phys Med Biol; 2006 Apr 07; 51(7):1941-55. PubMed ID: 16552116.
    Abstract:
    The development of ultrawideband (UWB) microwave diagnostic and therapeutic technologies, such as UWB microwave breast cancer detection and hyperthermia treatment, is facilitated by accurate knowledge of the temperature- and frequency-dependent dielectric properties of biological tissues. To this end, we characterize the temperature-dependent dielectric properties of a representative tissue type-animal liver-from 0.5 to 20 GHz. Since discrete-frequency linear temperature coefficients are impractical and inappropriate for applications spanning wide frequency and temperature ranges, we propose a novel and compact data representation technique. A single-pole Cole-Cole model is used to fit the dielectric properties data as a function of frequency, and a second-order polynomial is used to fit the Cole-Cole parameters as a function of temperature. This approach permits rapid estimation of tissue dielectric properties at any temperature and frequency.
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