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Fisher information ...
Fisher information analysis and preconditioning in electrical impedance tomography
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- Nordebo, Sven (author)
- Lund University,Lunds universitet,Linnéuniversitetet,Institutionen för datavetenskap, fysik och matematik, DFM,Vågor och signaler,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH
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- Bayford, Richard (author)
- Middlesex University, UK
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- Bengtsson, Bengt (author)
- Romele Elektronik AB, Sweden
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- Fhager, Andreas, 1976 (author)
- Department of Signals and Systems, Chalmers University of Technology,,Chalmers tekniska högskola,Chalmers University of Technology
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- Gustafsson, Mats (author)
- Lund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH,Department of Electrical and Information Technology, Lund University
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- Hashemzadeh, Parham (author)
- Department of Natural Sciences, Middlesex university,Middlesex University
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- Nilsson, Börje, 1949- (author)
- Linnéuniversitetet,Institutionen för datavetenskap, fysik och matematik, DFM,Vågor och signaler
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- Rylander, Thomas, 1972 (author)
- Department of Signals and Systems, Chalmers University of Technology,Chalmers tekniska högskola,Chalmers University of Technology
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- Sjödén, Therese (author)
- Linnéuniversitetet,Institutionen för datavetenskap, fysik och matematik, DFM,Vågor och signaler
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(creator_code:org_t)
- 2010-05-19
- 2010
- English.
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In: Journal of Physics: Conference Series 224 (2010), 1742-6588. - : IOP Publishing. - 1742-6596 .- 1742-6588. ; , s. 012057-
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Abstract
Subject headings
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- An adjoint field approach is used to formulate a general numerical framework for Fisher information based sensitivity analysis in electrical impedance tomography. General expressions are given for the gradients used in standard least squares optimization, i.e., the Jacobian related to the forward problem, and it is shown that these gradient expressions are consistent with commonly used electrode models such as the shunt model and the complete electrode model. By using the adjoint field formulations together with a variational analysis, it is also shown how the computation of the Fisher information can be integrated with the gradient calculations used for optimization. It is furthermore described how the Fisher information analysis and the related sensitivity map can be used in a preconditioning strategy to obtain a well balanced parameter sensitivity and improved performance for gradient based quasi-Newton optimization algorithms in electrical impedance tomography. Numerical simulations as well as reconstructions based on experimental data are used to illustrate the sensitivity analysis and the performance of the improved inversion algorithm in a four-electrode measurement set-up.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Electrical engineering
- Elektroteknik
- Electrotechnology
- Elektroteknik alt Electrical engineering
Publication and Content Type
- ref (subject category)
- kon (subject category)
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- By the author/editor
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Nordebo, Sven
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Bayford, Richard
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Bengtsson, Bengt
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Fhager, Andreas, ...
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Gustafsson, Mats
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Hashemzadeh, Par ...
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show more...
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Nilsson, Börje, ...
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Rylander, Thomas ...
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Sjödén, Therese
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- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Electrical Engin ...
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and Other Electrical ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Electrical Engin ...
- Articles in the publication
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Journal of Physi ...
- By the university
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Linnaeus University
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Chalmers University of Technology
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Lund University