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Imaging Cardiac Activity by the D-bar Method for <br/><br/>Electrical Impedance Tomography

Wednesday, December 31, 1969 - 6:00pm
EE/CS 3-180
Jennifer Mueller (Colorado State University)
Electrical Impedance Tomography (EIT) is an imaging technique that uses the
propagation of electromagnetic waves through a medium to form an image. In
medical EIT, current is applied through electrodes on the surface of the body,
the resulting voltages are measured on the electrodes, and the inverse
conductivity problem is solved numerically to reconstruct the conductivity
distribution in the interior. Here results are shown from EIT data taken on
electrodes placed around the circumference of a human chest to reconstruct a 2-D
cross-section of the torso. The images show changes in conductivity during a
cardiac cycle made from the D-bar reconstruction algorithm based on the 1996
uniqueness proof of A. Nachman [Ann.Math. 143].