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A parametric model for the changes in the complex valued conductivity of a lung during tidal breathing

Nordebo, Sven LU ; Dalarsson, Mariana; Khodadad, Davood; Müller, Beat; Waldman, Andreas D.; Becher, Tobias; Frerichs, Inez; Sophocleous, Louiza; Sjöberg, Daniel LU and Seifnaraghi, Nima, et al. (2018) In Journal of Physics D: Applied Physics 51(20).
Abstract

Classical homogenization theory based on the Hashin-Shtrikman coated ellipsoids is used to model the changes in the complex valued conductivity (or admittivity) of a lung during tidal breathing. Here, the lung is modeled as a two-phase composite material where the alveolar air-filling corresponds to the inclusion phase. The theory predicts a linear relationship between the real and the imaginary parts of the change in the complex valued conductivity of a lung during tidal breathing, and where the loss cotangent of the change is approximately the same as of the effective background conductivity and hence easy to estimate. The theory is illustrated with numerical examples based on realistic parameter values and frequency ranges used with... (More)

Classical homogenization theory based on the Hashin-Shtrikman coated ellipsoids is used to model the changes in the complex valued conductivity (or admittivity) of a lung during tidal breathing. Here, the lung is modeled as a two-phase composite material where the alveolar air-filling corresponds to the inclusion phase. The theory predicts a linear relationship between the real and the imaginary parts of the change in the complex valued conductivity of a lung during tidal breathing, and where the loss cotangent of the change is approximately the same as of the effective background conductivity and hence easy to estimate. The theory is illustrated with numerical examples based on realistic parameter values and frequency ranges used with electrical impedance tomography (EIT). The theory may be potentially useful for imaging and clinical evaluations in connection with lung EIT for respiratory management and control.

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publication status
published
subject
keywords
dielectric properties of biological tissue, dielectric properties of lung tissue, electrical impedance tomography, homogenization theory
in
Journal of Physics D: Applied Physics
volume
51
issue
20
publisher
IOP Publishing
external identifiers
  • scopus:85047182230
ISSN
0022-3727
DOI
10.1088/1361-6463/aabc04
language
English
LU publication?
yes
id
0ae5f362-22ee-4124-9275-2172536acc7a
date added to LUP
2018-06-01 15:30:15
date last changed
2019-10-15 06:39:33
@article{0ae5f362-22ee-4124-9275-2172536acc7a,
  abstract     = {<p>Classical homogenization theory based on the Hashin-Shtrikman coated ellipsoids is used to model the changes in the complex valued conductivity (or admittivity) of a lung during tidal breathing. Here, the lung is modeled as a two-phase composite material where the alveolar air-filling corresponds to the inclusion phase. The theory predicts a linear relationship between the real and the imaginary parts of the change in the complex valued conductivity of a lung during tidal breathing, and where the loss cotangent of the change is approximately the same as of the effective background conductivity and hence easy to estimate. The theory is illustrated with numerical examples based on realistic parameter values and frequency ranges used with electrical impedance tomography (EIT). The theory may be potentially useful for imaging and clinical evaluations in connection with lung EIT for respiratory management and control.</p>},
  articleno    = {205401},
  author       = {Nordebo, Sven and Dalarsson, Mariana and Khodadad, Davood and Müller, Beat and Waldman, Andreas D. and Becher, Tobias and Frerichs, Inez and Sophocleous, Louiza and Sjöberg, Daniel and Seifnaraghi, Nima and Bayford, Richard},
  issn         = {0022-3727},
  keyword      = {dielectric properties of biological tissue,dielectric properties of lung tissue,electrical impedance tomography,homogenization theory},
  language     = {eng},
  month        = {04},
  number       = {20},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics D: Applied Physics},
  title        = {A parametric model for the changes in the complex valued conductivity of a lung during tidal breathing},
  url          = {http://dx.doi.org/10.1088/1361-6463/aabc04},
  volume       = {51},
  year         = {2018},
}