Imaging system design based on electromagnetic tomography for high conductivity medium reconstruction

Area of Science:

• Electrical Engineering
• Imaging Science
• Applied Physics

Background:

• Electromagnetic tomography (EMT) creates images of electrical properties using electromagnetic measurements.
• Current EMT systems often rely on bulky commercial instruments, limiting portability.
• There is a need for more portable and extensible EMT solutions.

Purpose of the Study:

• To develop a purpose-built, flexible, and modularized EMT system.
• To enhance the portability and extensibility of electromagnetic tomography.
• To validate the effectiveness of the novel EMT system design.

Main Methods:

• A modularized hardware system comprising sensor array, signal conditioning, data acquisition, and computer modules was designed.
• Sensitivity matrix calculated using the perturbation method.
• L1 norm regularization problem solved with the split Bregman algorithm.

Main Results:

• The developed EMT system achieved an average signal-to-noise ratio of 48 dB.
• Numerical simulations verified the method's effectiveness.
• Experimental results successfully reconstructed images showing the number and positions of imaging objects.

Conclusions:

• The proposed flexible and modularized EMT system demonstrates feasibility and effectiveness.
• The novel design overcomes the bulkiness limitations of traditional EMT systems.
• This advancement facilitates wider application of portable electromagnetic tomography.