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  • Title: Microwave dielectric properties of tissue. Some comments on the rotational mobility of tissue water.
    Author: Schwan HP, Foster KR.
    Journal: Biophys J; 1977 Feb; 17(2):193-7. PubMed ID: 836937.
    Abstract:
    Dielectric permitivity and conductivity data are reviewed for tissue over the frequency range of 0.1-10 GHz. The conductivity of muscle increases quadratically with frequency above 1 GHz, suggesting a Debye relaxation for tissue water centered at 20 GHz at room temperature, the same as for bulk water. Approximate mixture equations suggest that this "free" water accounts for about 70% of the tissue weight, showing that most of the tissue water has rotational mobilities similar to those in the bulk fluid.
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