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Optimal experiments in electrical impedance tomography

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3 Author(s)
Paulson, Kevin ; Sch. of Comput. & Math. Sci., Oxford Brookes Univ., UK ; Lionheart, W. ; Pidcock, Michael

Electrical impedance tomography (EIT) is a noninvasive imaging technique which aims to image the impedance within a body from electrical measurements made on the surface. The reconstruction of impedance images is a ill-posed problem which is both extremely sensitive to noise and highly computationally intensive. The authors define an experimental measurement in EIT and calculate optimal experiments which maximize the distinguishability between the region to be imaged and a best-estimate conductivity distribution. These optimal experiments can be derived from measurements made on the boundary. The analysis clarifies the properties of different voltage measurement schemes. A reconstruction algorithm based on the use of optimal experiments is derived. It is shown to be many times faster than standard Newton-based reconstruction algorithms, and results from synthetic data indicate that the images that it produces are comparable

Published in:

Medical Imaging, IEEE Transactions on  (Volume:12 ,  Issue: 4 )

Date of Publication:

Dec 1993

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