Reconstructions of conductive and insulating targets using the D-bar method on an elliptical domain

• Published in: Physiological measurement Vol. 28; no. 7; p. S101
• Main Authors: Murphy, E K, Mueller, J L, Newell, J C
• Format: Journal Article
• Language: English
• Published: England 01-07-2007
• Subjects: Algorithms; Electric Impedance; Humans; Models, Biological; Phantoms, Imaging; Sodium Chloride; Tomography - methods
• ISSN: 0967-3334
• DOI: 10.1088/0967-3334/28/7/S08

The D-bar algorithm based on A Nachman's 2D global uniqueness proof for the inverse conductivity problem (Nachman 1996 Ann. Math. 143 71-96) is implemented on an elliptical domain. The scattering transform is computed on an ellipse and the complete electrode model (CEM) for the forward problem is computed with the finite element method (FEM) in order to obtain static conductivity reconstructions of conductive and insulating targets in a saline-filled tank. It is demonstrated that the spatial artifacts in the image are significantly reduced when the domain is properly modeled in the reconstruction, as opposed to being modeled as a disk.