System Description and First Application of an FPGA-Based Simultaneous Multi-Frequency Electrical Impedance Tomography
AbstractA new prototype of a multi-frequency electrical impedance tomography system is presented. The system uses a field-programmable gate array as a main controller and is configured to measure at different frequencies simultaneously through a composite waveform. Both real and imaginary components of the data are computed for each frequency and sent to the personal computer over an ethernet connection, where both time-difference imaging and frequency-difference imaging are reconstructed and visualized. The system has been tested for both time-difference and frequency-difference imaging for diverse sets of frequency pairs in a resistive/capacitive test unit and in self-experiments. To our knowledge, this is the first work that shows preliminary frequency-difference images of in-vivo experiments. Results of time-difference imaging were compared with simulation results and shown that the new prototype performs well at all frequencies in the tested range of 60 kHz–960 kHz. For frequency-difference images, further development of algorithms and an improved normalization process is required to correctly reconstruct and interpreted the resulting images. View Full-Text
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Aguiar Santos, S.; Robens, A.; Boehm, A.; Leonhardt, S.; Teichmann, D. System Description and First Application of an FPGA-Based Simultaneous Multi-Frequency Electrical Impedance Tomography. Sensors 2016, 16, 1158.
Aguiar Santos S, Robens A, Boehm A, Leonhardt S, Teichmann D. System Description and First Application of an FPGA-Based Simultaneous Multi-Frequency Electrical Impedance Tomography. Sensors. 2016; 16(8):1158.Chicago/Turabian Style
Aguiar Santos, Susana; Robens, Anne; Boehm, Anna; Leonhardt, Steffen; Teichmann, Daniel. 2016. "System Description and First Application of an FPGA-Based Simultaneous Multi-Frequency Electrical Impedance Tomography." Sensors 16, no. 8: 1158.
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