Imaging cardiac activity by the D-bar method for electrical impedance tomography.
A practical D-bar algorithm for reconstructing conductivity changes from EIT data taken on electrodes in a 2D geometry is described. The algorithm is based on the global uniqueness proof of Nachman (1996 Ann. Math. 143 71-96) for the 2D inverse conductivity problem. Results are shown for reconstructions from data collected on electrodes placed around the circumference of a human chest to reconstruct a 2D cross-section of the torso. The images show changes in conductivity during a cardiac cycle.
Isaacson
D
D
Department of Mathematical Sciences, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
Mueller
J L
JL
Newell
J C
JC
Siltanen
S
S
D000465:Algorithms; D016477:Artifacts; D002307:Cardiography, Impedance / Q000379:methods*; D017097:Electric Impedance; D006321:Heart / Q000033:anatomy & histology / Q000502:physiology; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D019047:Phantoms, Imaging; D010992:Plethysmography, Impedance / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014054:Tomography / Q000379:methods*