Publication: In vivo estimation of the head tissue conductivities by electrical impedance tomography technique and positivity constraint
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Issued Date
2017
Resource Type
File Type
application/pdf
Other identifier(s)
2-s2.0-85039947538
Rights Holder(s)
Scopus
Bibliographic Citation
2017 International Electrical Engineering Congress, iEECON 2017. (2017)
Suggested Citation
Ouypornkochagorn T. In vivo estimation of the head tissue conductivities by electrical impedance tomography technique and positivity constraint. 2017 International Electrical Engineering Congress, iEECON 2017. (2017). doi:10.1109/IEECON.2017.8075867 Retrieved from: https://hdl.handle.net/20.500.14740/4050
Author(s)
Abstract
Reported head tissue conductivities to date are usually obtained from sample investigation in situ or in vitro. However, there are many issues to concern e.g. sample selection and preparation or the deterioration of physiological property over time. In vivo estimation is recently used to estimate based on certain techniques. Electrical impedance tomography (EIT) is a mentioned technique, however regarding the susceptibility to noise of EIT, the estimation often results unexpected outcome. The estimated conductivity values may be inaccurate and/or be negative. The number of tissues in the estimation is then usually not over two. In this work, positivity constraint was employed to restrain the estimate to be only positive. Simulation result shows that the employment of the constraint can improve estimation accuracy and robustness to noise and also modeling error. Simultaneous estimation for all five main tissues is possible as well, even though the estimation of the cerebrospinal fluid conductivity is still not accurate. ©2017 IEEE.
Subject(s)
Cerebrospinal fluid
Electric impedance
Electric impedance measurement
Electric impedance tomography
Histology
Tomography
Electrical impe dance tomography (EIT)
Electrical impedance tomography
In-vivo
Physiological properties
Posivity constraint
Robustness to noise
Simultaneous estimation
Tissue conductivity
Tissue
Electric impedance
Electric impedance measurement
Electric impedance tomography
Histology
Tomography
Electrical impe dance tomography (EIT)
Electrical impedance tomography
In-vivo
Physiological properties
Posivity constraint
Robustness to noise
Simultaneous estimation
Tissue conductivity
Tissue