Method for structural information fused electrical impedance tomography

A technology of electrical impedance tomography and structural information, applied in the direction of diagnosis, diagnostic recording/measurement, medical science, etc., to achieve the effect of improving image quality, improving analysis ability, and improving accuracy

Active Publication Date: 2009-10-28
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] At present, in the field of electrical impedance tomography, there is no one that can provide a comp

Method used

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  • Method for structural information fused electrical impedance tomography
  • Method for structural information fused electrical impedance tomography
  • Method for structural information fused electrical impedance tomography

Examples

Experimental program
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Embodiment 1

[0038] Embodiment 1, with reference to figure 1 and figure 2 The devices required in this embodiment include a CT machine 301 for detecting the object to be tested to realize structural imaging, that is, a structural information acquisition device to collect images, a digital imaging scanner 302, an electrical impedance tomography system (EIT) 303, and an electrical impedance tomography imaging system. Professional electrode and electrode belt 304, film printer 305, CD recorder 306 and CT calibration object 307.

[0039]In the embodiment of the present invention, the object to be tested is a cross-sectional area of ​​the chest of a human body, and CT images with relatively high resolution are used for structural imaging. The structural information acquisition device is a digital image scanner capable of scanning CT slices, and the image output device is a film printer capable of printing CT slices.

[0040] In the flow of the embodiment such as image 3 shown.

[0041] Fi...

Embodiment 2

[0042] Example 2: In this example, refer to figure 1 , Figure 4 As shown, in the embodiment of the present invention, the object to be measured is a cross-sectional area of ​​the human head, and the structural image adopts a higher-resolution MRI image. The structural information collection device is a standard hospital information system network (Hospital Information Systems, HIS), and the image output device is a remote communication network. Its process is as follows Figure 4 shown. Use MRI to collect MRI images of the human head. The EIT system directly reads the MRI images through the HIS system and extracts the EIT prior information. Step is identical with embodiment 1.

Embodiment 3

[0043] Example 3: In this example, refer to figure 1 , figure 2 and image 3 As shown, in the embodiment of the present invention, instead of pasting CT calibration objects, optical or electromagnetic six-dimensional position sensors are used to directly obtain the position information of the pasted electrodes, and input them into the EIT system for use as prior information. All the other steps are the same as in Example 1.

[0044] In the following, the common processing methods in each preferred embodiment of the present invention will be further described in detail.

[0045] Pretreatment method

[0046] The EIT preprocessing method described in the present invention refers to the method of extracting EIT prior information from the structural image, and the EIT prior information includes but not limited to the boundary information of the object to be tested, the position information of the electrode pasting place, the boundary information of the internal structure of the...

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Abstract

The invention discloses a method for structural information fused electrical impedance tomography, which comprises the following steps: extracting internal structural information of an imaging target; converting the structural information into apriori information required by the electrical impedance tomography; performing the electrical impedance tomography by combining the obtained apriori information; and reconstructing structural information fused electrical impedance tomographic images to achieve the function. The method achieves the fused imaging of structural images and electrical impedance images, improves the accuracy of the electrical impedance images as functional images, improves the resolution of the images, and is helpful for a user to analyze the electrical impedance images at the same time.

Description

technical field [0001] The invention relates to a method for obtaining an internal impedance distribution image of a body to be measured by using an electrical impedance tomography (Electrical Impedance Tomography, EIT) technology, in particular to an electrical impedance tomography method for structural information fusion. Background technique [0002] Electrical impedance tomography (Electrical Impedance Tomography, EIT) technology is to apply a weak alternating current excitation on the surface of the object to be tested, detect the voltage distribution of the boundary of the measured area from the corresponding detection electrodes, and reconstruct the object through the algorithm. The distribution image of electrical impedance or the distribution image of electrical impedance change inside the measured area, when the object to be measured is a living body, can further reflect the change of the electrical impedance characteristic of the internal tissue of the living body ...

Claims

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Application Information

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IPC IPC(8): A61B5/053
Inventor 董秀珍付峰徐灿华刘锐岗史学涛尤富生
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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