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Reconfigurable Bioimpedance Emulation System for Electrical Impedance Tomography System Validation

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6 Author(s)
Nan Li ; Coll. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China ; Hui Xu ; Zhou Zhou ; Jinling Xin
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This paper presents a novel bioimpedance emulation method designed for electrical impedance tomography system validation. The proposed method can emulate the impedance frequency characteristics of various biological samples from user configurations. The bioimpedance emulation system is realized in a hardware prototype comprising current sensing circuitry, voltage generating circuitry, a USB controller and a field-programmable gate array (FPGA) for reconfigurable digital control of emulated impedance. Experimental validation shows that the emulation system exhibits good accuracy ( > 97% at 1 kOhm magnitude) in the frequency range 1 kHz to 1 MHz. The digitally configurability offers advantages in flexibility, repeatability, and cost-efficient compared to more traditional approaches, simplifying the validation process of electrical impedance tomography systems.

Published in:

Biomedical Circuits and Systems, IEEE Transactions on  (Volume:7 ,  Issue: 4 )

Date of Publication:

Aug. 2013

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