A reconstruction algorithm for electrical impedance tomography data collected on rectangular electrode arrays

• Published in: IEEE transactions on biomedical engineering Vol. 46; no. 11; pp. 1379 - 1386
• Main Authors: Mueller, J.L., Isaacson, D., Newell, J.C.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-11-1999; Institute of Electrical and Electronics Engineers
• Subjects: Algorithms; Biological and medical sciences; Breast Neoplasms - diagnosis; Conductivity measurement; Electric Impedance; Electric impedance tomography; Electric variables measurement; Electrodes; Electrodes - statistics & numerical data; Female; Humans; Image reconstruction; Impedance measurement; Investigative techniques, diagnostic techniques (general aspects); Medical sciences; Medium voltage; Miscellaneous. Technology; Models, Biological; Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques; Reconstruction algorithms; Surface impedance; Surface reconstruction; Tomography; Tomography - instrumentation; Tomography - methods; Tomography - statistics & numerical data; Voltage measurement; Electrode configuration; Rectangular configuration; Impedancemeter; Electrical properties; Tomography; Tridimensional image; Diagnosis; Spatial resolution; Implementation; Image reconstruction
• ISSN: 0018-9294; 1558-2531
• DOI: 10.1109/10.797998

A three-dimensional reconstruction algorithm in electrical impedance imaging is presented for determining the conductivity distribution beneath the surface of a medium, given surface voltage data measured on a rectangular array of electrodes. Such an electrode configuration may be desirable for using electrical impedance tomography to detect tumors in the human breast. The algorithm is based on linearizing the conductivity about a constant value. Here, the authors describe a simple implementation of the algorithm on a four electrode-by-four-electrode array and the reconstructions obtained from numerical and experimental tank data. The results demonstrate significantly better spatial resolution in the plane of the electrodes than with respect to depth.