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2010.34: Shape corrections for 3D EIT

2010.34: Kyriakos Paridis and William R. B. Lionheart (2010) Shape corrections for 3D EIT. In: 14th International Conference on Electrical Bioimpedance and the 11th Conference on Biomedical Applications of EIT, 4-8 Apr 2010, Gainesville, FL, USA.

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Abstract

Movement of the boundary in biomedical Electrical Impedance Tomography (EIT) has been always a source of error in image reconstruction. In the case of pulmonary EIT, where the patient's chest shape changes during respiration, this is inevitable, so it is essential to be able to correct for shape changes and consequently avoid artifacts. Assuming that the conductivity is isotropic, an assumption that is reasonable for lung tissue but admittedly violated for muscle, the boundary shape up to a Mobius transformation (conformal mapping) as well as the conductivity can theoretically be determined by 3D EIT data. While in two dimensions the space of conformal mappings are infinite dimensional, in the three dimensional case the Mobius transformations are given by a finite number of parameters. In this paper, we concentrate on the three dimensional case and take a linear approximation. We will give results of numerical studies analogous to the two dimensional work of Boyle et al. on the effect of electrode movement and shape error in 3D EIT.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Shape corrections, Inverse problems, Conformal map, Medical imaging, Electrical Impedance Tomography
Subjects:MSC 2000 > 35 Partial differential equations
MSC 2000 > 65 Numerical analysis
PACS 2003 > 89 Other areas of applied and interdisciplinary physics
MIMS number:2010.34
Deposited By:Mr Kyriakos Paridis
Deposited On:02 May 2010

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