Abstract
Electrical impedance tomography (EIT) is a non-invasive detection technique for human tissue imaging. However, most of the current EIT systems are complex and expensive in design. In this paper, we have developed a portable and economic EIT system, which just consists of five parts, including a data acquisition card (DAQ), a power module, a signal generator, a voltage-controlled current source, and a multiplexer module. The fast Fourier transform is used to extract the amplitude of the voltage signals collected by the DAQ. The Tikhonov regularization algorithm is adopted to reconstruct the image of conductivity distribution. Experiments on a practical phantom were designed and conducted to validate the performance of the system. The results showed that the developed system has an average signal-to-noise ratio of 65 dB for measurement channels and a high imaging signal accuracy of 0.99. The conductivity distribution in the phantom was successfully reconstructed by the developed EIT system.
This work was supported by the National Natural Science Foundation of China (U1913208, 61873135) and the Chinese fundamental research funds for the central universities.
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Xu, J., Lu, J., Zhang, S., Yu, N., Han, J. (2021). Design and Development of a Portable Electrical Impedance Tomography System. In: Liu, XJ., Nie, Z., Yu, J., Xie, F., Song, R. (eds) Intelligent Robotics and Applications. ICIRA 2021. Lecture Notes in Computer Science(), vol 13014. Springer, Cham. https://doi.org/10.1007/978-3-030-89098-8_40
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