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A high frequency, high frame rate front end for electrical impedance tomography | IEEE Conference Publication | IEEE Xplore

A high frequency, high frame rate front end for electrical impedance tomography


Abstract:

Electrical impedance tomography (EIT) is an imaging modality that takes spectral images of the tissue under study. The EIT imaging approach, compared to the other imaging...Show More

Abstract:

Electrical impedance tomography (EIT) is an imaging modality that takes spectral images of the tissue under study. The EIT imaging approach, compared to the other imaging techniques such as X-ray, offers an affordable, non-ionizing portable device for home health monitoring. A front-end with high frame rate that covers a wide range of frequencies is essential for such applications. This paper presents the circuit design and implementation of a high frequency, high frame rate front-end for electrical impedance tomography system. The proposed front-end comprises a wide bandwidth programmable gain instrumentation amplifier, a mega-sample per second analog-to-digital converter (ADC), and an ADC driver. The readout channel is designed and fabricated in a 0.18 μm CMOS technology. The measurement results show that the proposed front-end covers the wide frequency range of 100 Hz to 10 MHz, with a frame rate of 30 frames per second for a 16-electrode system, with an average signal-to-noise ratio of more than 60 dB. The entire read-out channel consumes between 6.9 mW and 21.8 mW based on its operation frequency.
Date of Conference: 19-21 October 2017
Date Added to IEEE Xplore: 29 March 2018
ISBN Information:
Conference Location: Turin, Italy

References

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