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Reconfigurable bioimpedance emulation system for electrical impedance tomography system validation.

Nan Li¹, Hui Xu, Zhou Zhou

¹College of Electronic Science and Engineering, National University of Defense Technology, 410073 Changsha, China. linan@nudt.edu.cn

IEEE Transactions on Biomedical Circuits and Systems

|July 30, 2013

Summary

A new bioimpedance emulation method offers accurate and flexible validation for electrical impedance tomography systems. This cost-effective hardware prototype simplifies system testing across a wide frequency range.

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Area of Science:

Biomedical Engineering
Electrical Engineering
Signal Processing

Background:

Electrical Impedance Tomography (EIT) systems require accurate validation.
Traditional methods for emulating bioimpedance are often inflexible and costly.

Purpose of the Study:

To present a novel, configurable bioimpedance emulation method for EIT system validation.
To demonstrate the accuracy and advantages of the proposed emulation technique.

Main Methods:

Development of a hardware prototype for bioimpedance emulation.
Utilizing a field-programmable gate array (FPGA) for digital control of impedance.
Emulating impedance frequency characteristics of biological samples.

Main Results:

The emulation system achieved high accuracy (>97% at 1 kOhm magnitude) from 1 kHz to 1 MHz.
Demonstrated flexibility, repeatability, and cost-efficiency compared to traditional methods.

Conclusions:

The novel bioimpedance emulation method effectively validates EIT systems.
Digital configurability simplifies the EIT system validation process, offering significant advantages.