Annular arrangement type multi-needle biological tissue dielectric spectrum characteristic measuring probe and method

A technology of biological tissue and measuring probes, which is applied in the measurement field of circularly arranged multi-needle biological tissue dielectric spectrum characteristic measuring probes, irregular shape and small volume soft tissue, and can solve the problem that the distribution parameters cannot meet the measurement requirements and cannot support the resistance of the method. Anti-measurement, inability to measure dielectric properties, etc., to achieve the effect of reducing the volume limit, reliable dielectric properties, and reducing the impact of contact impedance
CN102445574AInactive Publication Date: 2012-05-09FOURTH MILITARY MEDICAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FOURTH MILITARY MEDICAL UNIVERSITY
Publication Date
2012-05-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an annular arrangement type multi-needle biological tissue dielectric spectrum characteristic measuring probe, which comprises a base, wherein a plurality of needle type electrodes, a change-over switch and an excitation end and measuring end interface are arranged on the base; the plurality of needle type electrodes are arranged on two concentric circles of an inner ring and an outer ring formed on the base at equal interval and is perpendicular to the base to serve as excitation electrodes and measuring electrodes; and the electrodes of the same function are internally connected through copper wires on the base and are connected with the excitation end and measuring end interface through the change-over switch. The probe also comprises a calibration box which is matched with the probe for use. The invention also discloses an implementation method for biological tissue dielectric characteristic measurement by using the probe. The problem of strict requirement on shapes of tissues to be measured by the conventional measuring device is effectively solved, so that the electrical impedance measurement on the tissues of irregular shapes or the tissues difficultto cut is made possible.
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Description

technical field

[0001] The present invention relates to the field of measuring the dielectric properties of biological tissue, in particular to a ring-arranged multi-needle probe and method for measuring the dielectric spectrum properties of biological tissue, especially suitable for the measurement of small-volume soft tissues with irregular shapes in vitro, and has the advantages of High measurement accuracy. Background technique

[0002] The dielectric properties of biological tissue are the passive electrical properties of biological substances, a physical expression of the electrical response characteristics of biological substances to electromagnetic fields, and the basis of the response characteristics of tissues to external electromagnetic fields. The dielectric properties of biological tissue are usually characterized by the dielectric spectrum in which the conductivity σ and the permittivity ε vary with frequency. The permittivity ε is a measure of a biological su...

Claims

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