3D Electrical Impedance Tomography Electrode Array
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Solution Overview
Problem
Conventional electrical impedance tomography (EIT) methods have limited resolution due to the number and arrangement of electrodes, resulting in low-quality three-dimensional images, and increasing the frequency range does not significantly improve resolution.
Innovation Solution
A three-dimensional electrical impedance tomographic method that uses an electrode array with multiple horizontal and vertical electrode sets, where control signals and power parameters are used to selectively drive electrodes and combine voltage data from all electrodes to enhance image resolution and completeness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of electrodes is increased to improve image resolution, then the resolution of EIT images is improved, but the signal to noise ratio of the measurement data deteriorates
Solution Approach 1:
The electrode array is divided into multiple independent groups, with each group capable of performing complete measurement cycles. This segmentation allows the system to process measurements from multiple groups simultaneously or sequentially, increasing the total number of independent measurement data points without requiring a single large electrode array that would degrade signal quality.
Solution Approach 2:
The invention transitions from conventional two-dimensional electrode arrangements to a three-dimensional electrode array configuration. By adding the vertical dimension with multiple electrode groups positioned at different depths, the system increases the number of independent measurement paths and data points, thereby improving image resolution without proportionally increasing the number of surface electrodes.
2Measurement precision
If more electrodes are used to acquire measurement data, then the resolution of EIT images is improved, but the device complexity increases
Solution Approach 1:
The electrode array is divided into multiple independent groups, with each group capable of performing complete measurement cycles. This segmentation allows the system to process measurements from multiple groups simultaneously or sequentially, increasing the total number of independent measurement data points without requiring a single large electrode array that would degrade signal quality.
Solution Approach 2:
Each electrode group is designed to be universally functional, capable of serving as both driving electrodes (for current injection) and measuring electrodes (for voltage detection). This multi-functionality reduces the need for separate electrode sets for different measurement modes, thereby reducing overall device complexity while maintaining high measurement precision.
3Device complexity
If conventional two-dimensional electrode arrangements are used, then the device complexity is kept low, but the completeness of three-dimensional impedance distribution information is insufficient
Solution Approach 1:
The invention transitions from conventional two-dimensional electrode arrangements to a three-dimensional electrode array configuration. By adding the vertical dimension with multiple electrode groups positioned at different depths, the system increases the number of independent measurement paths and data points, thereby improving image resolution without proportionally increasing the number of surface electrodes.
Solution Approach 2:
The electrode array is divided into multiple independent groups, with each group capable of performing complete measurement cycles. This segmentation allows the system to process measurements from multiple groups simultaneously or sequentially, increasing the total number of independent measurement data points without requiring a single large electrode array that would degrade signal quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method improves the resolution and completeness of three-dimensional EIT images by increasing the number of independently measured data points, allowing for more precise reconstruction of impedance distributions within objects.
Implementation Method 1
The electrical impedance tomography (EIT) is a medical imaging technology which produces tomographic images by measuring the conductivity distribution of a certain part of human body
Implementation Method 2
a small amount of alternating current is applied to some or all of the electrodes and the potential difference produced is measured by the electrodes
Data Source
AI summary
A three dimensional electrical impedance tomographic method is disclosed. The three dimensional electrical impedance tomographic method includes steps of disposing an implantation body, wherein an electrode array formed by a plurality of electrodes is disposed on the implantation body; disposing an electrode controller to control any electrode in the electrode array; generating more independent voltage data measured on the plurality of electrodes on the same curve surface by combining current control technology or virtual electrode technology; and performing a calculation to convert the plurality of horizontal or vertical voltage data into a three dimensional electrical impedance tomographic image.