Electroimpedance Tomography Electrode Belt Cable Routing
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Solution Overview
Problem
Electroimpedance tomography devices face significant noise interference due to magnetic cross-talk during data acquisition, particularly when electrode feed lines for current and voltage measurements are distributed across different multiwire feed cables.
Innovation Solution
The device employs an electrode belt with two groups of electrodes, where at least one adjacent electrode is electrically connected via an additional feed line extending through the adjacent group's cable, reducing magnetic cross-talk and interference by using dual electrical connections for adjacent electrodes across different multiwire feed cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrode feed lines for current and voltage measurements are distributed across different multiwire feed cables, then data acquisition can be performed with standard cable configurations, but magnetic cross-talk and interference signals increase significantly
Solution Approach 1:
The patent combines the feed lines for current and voltage measurements into the same multiwire feed cable when the electrodes are adjacent to each other. This merging of feed lines that were previously separated into different cables eliminates the magnetic cross-talk between cables while maintaining the ability to perform adjacent data acquisition. The control unit is configured to identify adjacent electrodes and route their feed lines through the same cable.
2Object-affected harmful factors
If electrode feed lines are kept within a single multiwire feed cable, then magnetic cross-talk is minimized, but the device complexity increases due to additional routing requirements
Solution Approach 1:
The patent applies different feed line routing strategies based on the local relationship between electrode pairs. For adjacent electrodes, both feed lines are routed through the same cable. For non-adjacent electrodes, feed lines can be routed through different cables. This localized adaptation of the routing configuration minimizes magnetic cross-talk where it matters most while avoiding unnecessary complexity elsewhere in the system.
Solution Approach 2:
The control unit dynamically determines the routing configuration based on the specific electrode pairs being used for current and voltage measurements. The system adapts the feed line routing in real-time based on the measurement requirements, selecting which cables to use for each measurement configuration to optimize the balance between minimizing cross-talk and maintaining operational flexibility.
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 configuration significantly reduces magnetic cross-talk and interference signals during data acquisition, enhancing the noise level and accuracy of impedance distribution measurements in electroimpedance tomography.
Implementation Method 1
Magnetic fields, which compromise the voltage measurements, may develop due to the current feed at adjacent electrodes. This magnetic cross-talk is slight as long as the electrode feed lines affected extend within a single multiwire feed cable.
Data Source
AI summary
A device for electroimpedance tomography with an electrode belt (2), which has electrodes (E1 . . . E16), wherein at least two groups (5, 6) of electrodes located next to each other are formed and the electrodes of one group are contacted with at least one, multiwire feed cable (7, 8). For a reduced noise level during data acquisition, provisions are made for at least one electrode (E9) of two mutually adjacently located electrodes (E8, E9) of two different groups (5, 6) to have an additional electrode feed line (15), which is led over the feed cable (7) of the adjacent group (5).