Partial least square method based electrical impedance tomography method

A partial least squares, electrical impedance imaging technology, applied in medical imaging, medical science, diagnostic signal processing, etc., can solve problems such as large storage space requirements, long single-step iteration time, limitations, etc., to achieve the effect of improving imaging quality

Inactive Publication Date: 2018-02-02
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The research on the electrical impedance reconstruction algorithm shows that the modified Newton-Raphson method has the advantages of small reconstruction error, good convergence and low requirements on the initial value. Its disadvantages are that the single-step iteration time is long and the storage space is large. , thus limiting its use in actual impedance image reconstruction; the equipotential line method is currently the fastest impedance reconstruction algorithm, but the results obtained due to its unrigorous theoretical deduction have large errors

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  • Partial least square method based electrical impedance tomography method

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[0017] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

[0018] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as herein, are not to be taken in an idealized or overly formal sense. explain.

[0019] Below in conjunction with accompanying drawing, the technical scheme of the p...

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Abstract

The invention discloses a partial least square method based electrical impedance tomography method. The electrical impedance tomography method includes: performing current excitation in a no-load modeand an imaging target placement mode; acquiring the measured boundary voltage of the two modes; using the partial least square method to calculate target area impedance distribution change accordingto information of the acquired boundary voltage change matrix and a sensitive matrix; and achieving electrical impedance image reconstruction. The partial least square method based electrical impedance tomography method can correct the image reconstruction result, and can improve the imaging quality of electrical impedance tomography.

Description

technical field [0001] The invention relates to an electrical impedance imaging method based on a partial least squares method, and belongs to the technical field of electrical impedance imaging. Background technique [0002] Electrical Impedance Tomography (EIT) technology is a new functional imaging technology. Electrical impedance imaging technology does not use radionuclides or rays, and is harmless to the human body. It can be used as a medical monitoring device for long-term and continuous monitoring of patients without causing damage or discomfort to patients. In addition, the cost of the equipment is low and no special working environment is required, so it is an ideal non-invasive medical imaging technology and image monitoring technology with wide application prospects. It quickly became a research hotspot at the end of the 20th century. [0003] How to achieve high precision, high resolution and fast algorithm convergence of the system is the main problem of the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/053
CPCA61B5/0536A61B5/72A61B2576/00
Inventor 刘瑞兰张夏婉戎舟
Owner NANJING UNIV OF POSTS & TELECOMM
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