Cylindrical Dielectric Properties Measuring Box for Isolated Biological Tissue

Abstract

The invention discloses a dielectric property measuring box for cylindrical in vitro biological tissues. The dielectric property measuring box consists of a measuring box and a measuring box cover, wherein two silver ring electrodes are inlaid in an inner wall of the measuring box at intervals; an inner surface of each silver ring electrode has the same height as the inner wall of the measuring box; a silver disc electrode is inlaid on the measuring box cover; and when the measuring box cover is fastened to the measuring box, the silver disc electrode is tightly contacted with the measuring box. Four silver electrodes on the measuring box can be led out and are correspondingly connected with an impedance analyzer, the corresponding parameters of the impedance analyzer are set, the electrical impedance frequency spectrum of the biological tissue to be tested is obtained, and the conductivity and dielectric coefficient of the biological tissue to be tested can be calculated according to a corresponding formula. The appearance of the tested tissues can be accurately controlled, the measuring box is particularly suitable for dielectric property measurement of small-sized in vitro soft tissues, and accurate measurement is convenient.

Description

technical field [0001] The invention relates to the field of measuring the dielectric properties of biological tissues, in particular to a cylindrical measuring box for the dielectric properties of isolated biological tissues, which is especially suitable for isolated small-volume soft tissues and has high measurement accuracy. Background technique [0002] The dielectric properties of biological tissue are the characteristics of the tissue's absorption and coupling of electromagnetic energy in the electromagnetic field. It has a frequency-dependent relaxation property and is the passive response ability of the tissue to the external electromagnetic field. The dielectric properties of biological tissue are usually characterized by electrical conductivity σ and relative permittivity ε. Relative permittivity ε is a measure of biological matter storing electromagnetic energy in an electromagnetic field, while electrical conductivity σ indicates the ability of biological matter ...

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Problems solved by technology

[0004] Aiming at the defect that existing measuring boxes cannot guarantee the accuracy of measuring the dielectric properties of biological tissues, the purpose of the present invention is to provide a cylindrical type measuring box for the dielectric properties of isolated biological tissues, which not only has specifications The geometric size of the measured tissue can be precisely controlled, which is convenient for the accurate measurement of the dielectric properties of biological tissue, and the electrode and the measurement box are integrated to simplify the wiring method and reduce the influence of distributed parameters on the measurement.

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