Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12470
ชื่อเรื่อง: Influence of electrode placement error and contact impedance error to scalp voltage in electrical impedance tomography application
ผู้แต่ง: Ouypornkochagorn T.
Keywords: Electric contacts
Electric impedance
Electric impedance measurement
Electric impedance tomography
Electrodes
Brain stimulation
Contact impedance
Electrical impe dance tomography (EIT)
Electrical impedance tomography
Electrode contacts
Electrode placement
Voltage error
Voltage response
Errors
วันที่เผยแพร่: 2019
บทคัดย่อ: 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.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12470
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077969847&doi=10.1109%2fiEECON45304.2019.8939016&partnerID=40&md5=9eeeee7b42e35197e51ab8dd858f0ac1
Appears in Collections:Scopus 1983-2021

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