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Electrical impedance imaging method

A technology for electrical impedance imaging and imaging objects, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as electrode contact artifacts, severe boundary effects, etc., to reduce hardware costs, overcome electrode contact artifacts, and ensure The effect of consistency

Inactive Publication Date: 2013-01-02
SOUTHEAST UNIV
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Problems solved by technology

[0019] The technical problem to be solved by the present invention is to solve the serious boundary effects and electrode contact artifacts existing in the existing EIS system imaging, and to provide a reliable and effective electrical impedance imaging method

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Embodiment Construction

[0045] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0046] The electrical impedance imaging system of the present invention (for the sake of distinction, the electrical impedance imaging method of the present invention is subsequently referred to as a double-face pressure difference electrical impedance scanning imaging method: dual-face pressure difference electrical impedance scanning, referred to as DFPD-EIS) includes such Figure 4(a) shows two identical planar electrode arrays arranged on both sides of the breast, and each planar electrode array includes 960 uniformly distributed electrodes. Considering that the breast diameter of Chinese women is within 100-170mm, the female breast can be approximately regarded as a hemispherical shape. Similar to the structure of X-ray mammography, the breast is pressed by two flat-plate electrode arrays, and its shape will change from a hemispherical shape to a re...

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Abstract

The invention discloses an electrical impedance imaging method, and belongs to the technical field of electrical impedance scanning and imaging. The method disclosed by the invention comprises: step 1, respectively arranging a first electrode device and a second electrode device contacting with the surface of an object to be imaged at the two opposite sides of the object to be imaged, and enabling the first electrode device and the second electrode device to apply a constant clamp force onto the object to be imaged; step 2, applying an input electric signal via the first electrode device, acquiring the output electric signal of the second electrode device, and obtaining the current distribution of the object to be imaged under the clamp force; step 3, changing the clamping forced applied on the object to be imaged by the first electrode device and the second electrode device, and repeating the step 2; and step 4, constructing the impedance image of the object to be imaged according to the current distribution difference value of the object to be imaged between two different clamp forces. Compared with the prior art, the method disclosed by the invention has the advantages of higher sensitivity, good electrode contact antifact inhibition effect, and low implementation cost.

Description

technical field [0001] The invention relates to an electrical impedance imaging method, which belongs to the field of electrical impedance scanning imaging technology (electrical impedance scanning, EIS). Background technique [0002] Since the electrical admittance (impedance) of human breast cancer focus tissue is greater (smaller) than that of normal breast tissue, breast cancer detection or diagnosis techniques based on measuring tissue electrical impedance or admittance have been developed rapidly. Since the concept of impedance is more familiar, such techniques are referred to as electrical impedance techniques. At present, this field has developed from isolated tissue measurement and invasive in vivo measurement to non-invasive in vivo measurement. Electrical impedance scanning imaging technology is a typical representative of electrical impedance technology in the field of breast cancer detection and diagnosis. EIS introduces a constant amplitude AC voltage signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/053
Inventor 张峰罗立民鲍旭东
Owner SOUTHEAST UNIV
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