Reconstructions of chest phantoms by the D-bar method for electrical impedance tomography

• Published in: IEEE transactions on medical imaging Vol. 23; no. 7; pp. 821 - 828
• Main Authors: Isaacson, D., Mueller, J.L., Newell, J.C., Siltanen, S.
• Format: Journal Article
• Language: English
• Published: United States IEEE 01-07-2004; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Agar; Algorithms; Cardiography, Impedance - instrumentation; Cardiography, Impedance - methods; Conductivity; Current density; Electric Impedance; Electrodes; Heart; Image Processing, Computer-Assisted - instrumentation; Image Processing, Computer-Assisted - methods; Image reconstruction; Imaging phantoms; Impedance; Models, Statistical; Phantoms, Imaging; Reconstruction algorithms; Scattering, Radiation; Thorax - physiology; Tomography; Tomography - instrumentation; Tomography - methods; Voltage
• ISSN: 0278-0062; 1558-254X
• DOI: 10.1109/TMI.2004.827482

The problem this paper addresses is how to use the two-dimensional D-bar method for electrical impedance tomography with experimental data collected on finitely many electrodes covering a portion of the boundary of a body. This requires an approximation of the Dirichlet-to-Neumann, or voltage-to-current density map, defined on the entire boundary of the region, from a finite number of matrix elements of the current-to-voltage map. Reconstructions from experimental data collected on a saline filled tank containing agar heart and lung phantoms are presented, and the results are compared to reconstructions by the NOSER algorithm on the same data.