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  1. IEEE Signal Processing Magazine
  2. Year : 2001 Volume : 18
  3. Issue 6
  4. Electrical impedance tomography
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Year : 2001 Volume : 18
Issue 6
A proposal to minimize the NAAPIPT based on /spl mu/HRR
Emerging medical imaging modalities
Electromagnetic brain mapping
Electrical impedance tomography
Imaging myocardial strain
Imaging the body with diffuse optical tomography
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Issue 4
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Issue 1
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Electrical impedance tomography

Content Provider IEEE Xplore Digital Library
Author Saulnier, G.J. Blue, R.S. Newell, J.C. Isaacson, D. Edic, P.M.
Copyright Year 1991
Description Electrical impedance tomography (EIT) is an imaging modality that estimates the electrical properties at the interior of an object from measurements made on its surface. Typically, currents are injected into the object through electrodes placed on its surface, and the resulting electrode voltages are measured. An appropriate set of current patterns, with each pattern specifying the value of the current for each electrode, is applied to the object, and a reconstruction algorithm uses knowledge of the applied current patterns and the measured electrode voltages to solve the inverse problem, computing the electrical conductivity and permittivity distributions in the object. This article focuses on the type of EIT called adaptive current tomography (ACT) in which currents are applied simultaneously to all the electrodes. A number of current patterns are applied, where each pattern defines the current for each electrode, and the subsequent electrode voltages are measured to generate the data required for image reconstruction. A ring of electrodes may be placed in a single plane around the object, to define a two-dimensional problem, or in several layers of such rings, to define a three-dimensional problem. The reconstruction problem is described and two algorithms are discussed, a one-step, two-dimensional (2-D) Newton-Raphson algorithm and a one-step, full three-dimensional (3-D) reconstructor. Results from experimental data are presented which illustrate the performance of the algorithms.
Starting Page 31
Ending Page 43
Page Count 13
File Size 10334579
File Format PDF
ISSN 10535888
Volume Number 18
Issue Number 6
Language English
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date 2001-11-01
Publisher Place U.S.A.
Access Restriction Subscribed
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword Tomography Electrodes Voltage Current measurement Permittivity measurement Image reconstruction Surface impedance Electric variables measurement Surface reconstruction Impedance measurement
Content Type Text
Resource Type Article
Subject Electrical and Electronic Engineering Applied Mathematics Signal Processing
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