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Conductivity Reconstructions Using Real Data from a New Planar Electrical Impedance Device

Domenii publicaţii > Matematica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: K-H. Georgi, C. Hähnlein, K. Schilcher, C. Sebu and H. Spiesberger

Editorial: Inverse Problems in Science and Engineering, 2013.


In this paper, we present results of reconstructions using real data from a new planar
electrical impedance tomography device developed at the Institut für Physik,
Johannes Gutenberg Universität, Mainz, Germany. The prototype consists of a
planar sensing head of circular geometry, and it was designed mainly for breast
cancer detection. There are 12 large outer electrodes arranged on a ring of radius
R = 4.8 cm where the external currents are injected, and a set of 54 point-like
high-impedance inner electrodes where the induced voltages are measured. Two
direct (i.e. non-iterative) reconstruction algorithms are considered: one is based
on a discrete resistor model, and the other one is an integral equation approach
for smooth conductivity distributions.

Cuvinte cheie: electrical impedance tomography; integral equationmethods; resistor networks; breast cancer detection; nonlinear inverse problems; ill-posed problems