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Spatial resolution in electrical impedance tomography: A topical review

Venkatratnam Chitturi
Venkatratnam Chitturi
 and 
Nagi Farrukh
Nagi Farrukh
   | Jul 23, 2017
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Article Category: Reviews
Published Online: Jul 23, 2017
Page range: 66 - 78
Received: Jul 19, 2016
DOI: https://doi.org/10.5617/jeb.3350
Keywords
© 2017 Venkatratnam Chitturi and Nagi Farrukh, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

General block diagram of an EIT system. The input current is injected through a pair of electrodes attached to the test object. The corresponding output voltages are measured and finally an image of conductivity distribution is reconstructed.
General block diagram of an EIT system. The input current is injected through a pair of electrodes attached to the test object. The corresponding output voltages are measured and finally an image of conductivity distribution is reconstructed.

Fig. 2

Coordinate systems. Arbitrary point P has cylindrical polar coordinates (r, ϴ) with origin O and curvilinear polar coordinates with origin O; Φ is constant on the curved dashed lines and ρ is constant on the curved full line intersecting the dashed line as redrawn from [11].
Coordinate systems. Arbitrary point P has cylindrical polar coordinates (r, ϴ) with origin O and curvilinear polar coordinates with origin O; Φ is constant on the curved dashed lines and ρ is constant on the curved full line intersecting the dashed line as redrawn from [11].

Fig. 3

A compound electrode uses an outer electrode to inject current and an inner electrode to measure voltage as redrawn from [13].
A compound electrode uses an outer electrode to inject current and an inner electrode to measure voltage as redrawn from [13].

Fig. 4

Block diagram of a REIT system based on [20].
Block diagram of a REIT system based on [20].

Fig. 5

(a) Inflatable belt [21] (b) Active electrode belt [22] (c) Nano fiber web electrode belt [23].
(a) Inflatable belt [21] (b) Active electrode belt [22] (c) Nano fiber web electrode belt [23].

Fig. 6

(a) Neighboring (b) Opposite (c) Cross methods of current injection.
(a) Neighboring (b) Opposite (c) Cross methods of current injection.

Fig. 7

Novel electrode configuration based on [30].
Novel electrode configuration based on [30].

Fig. 8

Block diagram of the EIT system redrawn from [31].
Block diagram of the EIT system redrawn from [31].

Fig. 9

Longitudinal section of the reconstructed images with the perturbations located in the movement region of the brain a) The original distributions of the two perturbations (b) The images reconstructed by the sLORETA alone (c) The images reconstructed by shrinking sLORETA-FOCUSS based on [37].
Longitudinal section of the reconstructed images with the perturbations located in the movement region of the brain a) The original distributions of the two perturbations (b) The images reconstructed by the sLORETA alone (c) The images reconstructed by shrinking sLORETA-FOCUSS based on [37].

Fig. 10

Plots of the actual and reconstructed conductivities for the virtual phantom chest as re-arranged from [41].
Plots of the actual and reconstructed conductivities for the virtual phantom chest as re-arranged from [41].

Fig. 11

Wavelet image fusion algorithm redrawn from [52].
Wavelet image fusion algorithm redrawn from [52].

Fig. 12

Meshes refined by COMSOL based on [54].
Meshes refined by COMSOL based on [54].

Fig. 13

Locations of 3 representative pixels in grids based on [54].
Locations of 3 representative pixels in grids based on [54].
eISSN:
1891-5469
Language:
English
Publication timeframe:
Volume Open
Journal Subjects:
Engineering, Bioengineering and Biomedical Engineering, Biomedical Electronics, Life Sciences, Biophysics, Medicine, Biomedical Engineering, Physics, Spectroscopy and Metrology
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