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Enhancing breast tumor detection with near-field imaging

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      The dielectric properties of biological tissues: II. Measurements in the frequency range 10 Hz to 20 GHz.

      Three experimental techniques based on automatic swept-frequency network and impedance analysers were used to measure the dielectric properties of tissue in the frequency range 10 Hz to 20 GHz. The technique used in conjunction with the impedance analyser is described. Results are given for a number of human and animal tissues, at body temperature, across the frequency range, demonstrating that good agreement was achieved between measurements using the three pieces of equipment. Moreover, the measured values fall well within the body of corresponding literature data.
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        The dielectric properties of biological tissues: III. Parametric models for the dielectric spectrum of tissues.

        A parametric model was developed to describe the variation of dielectric properties of tissues as a function of frequency. The experimental spectrum from 10 Hz to 100 GHz was modelled with four dispersion regions. The development of the model was based on recently acquired data, complemented by data surveyed from the literature. The purpose is to enable the prediction of dielectric data that are in line with those contained in the vast body of literature on the subject. The analysis was carried out on a Microsoft Excel spreadsheet. Parameters are given for 17 tissue types.
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          The dielectric properties of biological tissues: I. Literature survey.

          The dielectric properties of tissues have been extracted from the literature of the past five decades and presented in a graphical format. The purpose is to assess the current state of knowledge, expose the gaps there are and provide a basis for the evaluation and analysis of corresponding data from an on-going measurement programme.
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            Author and article information

            Journal
            IEEE Microwave Magazine
            IEEE Microwave
            Institute of Electrical and Electronics Engineers (IEEE)
            15273342
            March 2002
            : 3
            : 1
            : 48-56
            10.1109/6668.990683
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