Improving spatial resolution for EIT reconstructed images through measurement strategies

Chin, Renee Ka Yin; York, T.A.

doi:10.1109/icsipa.2013.6707968

Cited by 6 publications

(2 citation statements)

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“…As a consequence, the number of electrodes, their shape and the mesh used in the reconstruction algorithm could be optimised so as to converge more quickly or lead to better results. Although spatial resolution has already been discussed in the case of other electrical imaging techniques such as electrical impedance tomography (EIT) [20], it is generally related to the smallest detectable element [21] or to the effect of the reconstruction algorithm [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Physical limitations on spatial resolution in electrical capacitance tomography

Lucas

Margo

Oussar

et al. 2015

Meas. Sci. Technol.

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Electrical Capacitance Tomography (ECT) is an imaging technique providing the distribution of permittivity in a medium by the mean of electrodes. As for any imaging systems, the reachable spatial resolution is a key parameter. In this paper the spatial resolution of ECT sensors is analyzed in terms of the accuracy of an object position and of the ability to distinguish between two close objects. Cylindrical geometry sensors are particularly studied and the example of a square geometry sensor is used to show how to study any other geometries. In cylindrical geometries, it is shown that a 50% gap between electrodes is a good compromise and that increasing the number of electrodes improves the spatial resolution near the electrodes but decreases the spatial resolution in the center. The best spatial resolution at the center of the sensor is obtained with 3 or 4 electrodes. In the square geometry studied, it is shown that a better distribution of the spatial resolution is obtained when there are electrodes in the corners.

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Section: Introductionmentioning

confidence: 99%

Physical limitations on spatial resolution in electrical capacitance tomography

Lucas

Margo

Oussar

et al. 2015

Meas. Sci. Technol.

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“…The lesser the FWHM percentage, the higher will be the spatial resolution. The use of two layers provides somewhat better information about the test object [28].…”

Section: Factors Limiting Resolution Hardwarementioning

confidence: 99%

Spatial resolution in electrical impedance tomography: A topical review

Chitturi¹,

Nagi²

2017

Journal of Electrical Bioimpedance

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Electrical impedance tomography (EIT) is a relatively new imaging technique. It has the advantages of low cost, portability, noninvasiveness and is free from radiation effects. So far, this imaging technique has shown satisfactory results in functional imaging. However, it is not yet fully suitable for anatomical imaging due to its poor spatial resolution. In this paper, we review the basic directions of research in the area of the spatial resolution of the EIT systems. The improvements to the hardware and the software developments are highlighted. Finally, possible techniques to enhance the spatial resolution of the EIT systems using array processing beamforming methods are discussed.

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