A digital biomedical electrical impedance tomography
(EIT) system is developed with the aid of FPGA. The key elements of EIT system
are described specifically in the paper. The functions are realized to generate
excitation source, switch electrode channels, deal collected signals,
demodulate measured voltages etc. The system is tested by a circular tank with
16 stainless electrodes attached around the boundary. The adjacent incentive
adjacent measurement mode is adapted to collect boundary voltages of the interesting
field. By testing, the system works with 36 dB signal-to-noise ratio (SNR) when
1 mA 100 KHz current is applied into a homogenous tank.
Cite this paper
Wu, J. , Chen, X. and Ding, Z. (2013) Digital biomedical electrical impedance tomography based on FPGA. Journal of Biosciences and Medicines
, 14-18. doi: 10.4236/jbm.2013.12004
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