Publication: Influence of electrode placement error and contact impedance error to scalp voltage in electrical impedance tomography application
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Issued Date
2019
Resource Type
File Type
application/pdf
Other identifier(s)
2-s2.0-85077969847
Rights Holder(s)
Scopus
Bibliographic Citation
iEECON 2019 - 7th International Electrical Engineering Congress, Proceedings. (2019)
Suggested Citation
Ouypornkochagorn T. Influence of electrode placement error and contact impedance error to scalp voltage in electrical impedance tomography application. iEECON 2019 - 7th International Electrical Engineering Congress, Proceedings. (2019). doi:10.1109/iEECON45304.2019.8939016 Retrieved from: https://hdl.handle.net/20.500.14740/5419
Author(s)
Abstract
Electrical Impedance Tomography (EIT) is an imaging technique which relies on the accuracy of boundary voltage measurement. In application to the head of EIT, the scalp voltage is very small and sensitive to noise and error. Electrode placement error is an error which is difficult to avoid in practice. Furthermore, the exact value of electrode contact impedance is difficult to know. In this study, the influence of electrode placement error and inaccurate electrode contact impedance were investigated by simulation. The result shows that the scalp voltage error due to the placement error was between 0.003 mV and 4.670 mV. Comparing to the scalp voltage response obtained from brain stimulation, which has been reported less than 90 μV, the most of the error values were much larger. The voltage errors due to inaccurate contact impedance were less than 1.2 μV which is very small and ignorable. This indicates the importance of the attachment procedure of electrodes that needs to be very careful. © 2019 IEEE.