Abstract
A simple bench test instrument was developed to measure the real part of the impedance of a patient simulated by a phantom (variable R 350-600 ohm in parallel with C=47nF). The instrument is part of an EIT design which includes a EVM-L137 evaluation kit to enhance previous designs. The DSP included in the kit generates the waveform to control current sources. We use this original signal as a time reference to measure voltage phase, thus minimizing unknown delays. Once data are corrected by a linear fit to remove systematic errors in measurement, the values obtained deviate on average 0.9% from the expected. This instrument will allow to further compare design options in EIT circuit development.
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References
A. Rodríguez, A. Ferreira, and F. Simini, 2003 “IMPETOM-C Tomógrafo de Impedancia Eléctrica,” Thesis, Universidad de la República, Montevideo, Uruguay.
R. Hartmam, J. Lobo, M. Ruétalo, and F. Simini, 2002 “IMPETOM-I Tomógrafo de Impedancia Eléctrica,” Thesis, Universidad de la República, Montevideo, Uruguay.
D. C. Barber and B. H. Brown, 1984 “Applied potential tomography,” J. Phys. E., vol. 17, no. 9, p. 723.
S. González, A. Liguori, and F. Simini, 2005 “IMPETOM: Tomógrafo de Impedancia Eléctrica,” Thesis, Universidad de la República - Uruguay.
W. Quinteros and F. Simini, 2007 “IMPETOM-48: Tomógrafo de Impedancia Eléctrica con treshileras de electrodos,” Thesis, Universidad de la República, Montevideo, Uruguay.
E. Santos, 2014 “Alternativas de proyecto e implementación de circuitos y de programas de reconstrucción tendientes a un tomógrafo por impedancia eléctrica para la presentación compacta del estado edemático de cortes torácicos en tiempo real,” Thesis, Universidad de la República - Uruguay.
N. Alfaro, M. Arregui, F. Martinucci, E. Santos, and F. Simini, 2015 “IMPETOM-B: Tomógrafo de Impedancia Eléctrica,” Universidad de la República, Montevideo, Uruguay.
N. Alfaro, M. Arregui, F. Martinucci, E. Santos, and F. Simini, 2016 “Audio Codec and Digital Signal Processor for an Electrical Impedance Tomography System,” in II Latin American Conference on Bioimpedance, F. Simini and P. Bertemes-Filho, Eds., Springer, pp. 16–19.
E. Teschner and M. Imhoff, 2010 Tomografia por Impedancia Electrica: A realização da monitorização da ventilação regional, Drager tec. Lubeck, Alemania.
G. Saulnier, 2005, “EIT Instrumentation,” In Electrical Impedance Tomography: Methods, History And Application, D. Holder, Ed. London: Institute Of Physics, P. 67.
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Arregui, M., Santos, E., Simini, F. (2017). Test Bench to Validate Audio CODEC Kit as EIT Complex Voltage Measurement Circuit. In: Torres, I., Bustamante, J., Sierra, D. (eds) VII Latin American Congress on Biomedical Engineering CLAIB 2016, Bucaramanga, Santander, Colombia, October 26th -28th, 2016. IFMBE Proceedings, vol 60. Springer, Singapore. https://doi.org/10.1007/978-981-10-4086-3_34
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DOI: https://doi.org/10.1007/978-981-10-4086-3_34
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