Document Type
Article
Language
eng
Publication Date
5-2017
Publisher
IOP Publishing
Source Publication
Physiological Measurement
Source ISSN
0967-3334
Abstract
Electrical impedance tomography (EIT) is an emerging imaging modality that uses harmless electrical measurements taken on electrodes at a body's surface to recover information about the internal electrical conductivity and or permittivity. The image reconstruction task of EIT is a highly nonlinear inverse problem that is sensitive to noise and modeling errors making the image reconstruction task challenging. D-bar methods solve the nonlinear problem directly, bypassing the need for detailed and time-intensive forward models, to provide absolute (static) as well as time-difference EIT images. Coupling the D-bar methodology with the inclusion of high confidence a priori data results in a noise-robust regularized image reconstruction method. In this work, the a priori D-bar method for complex admittivities is demonstrated effective on experimental tank data for absolute imaging for the first time. Additionally, the method is adjusted for, and tested on, time-difference imaging scenarios. The ability of the method to be used for conductivity, permittivity, absolute as well as time-difference imaging provides the user with great flexibility without a high computational cost.
Recommended Citation
Hamilton, Sarah J., "EIT Imaging of Admittivities with a D-Bar Method and Spatial Prior: Experimental Results for Absolute and Difference Imaging" (2017). Mathematics, Statistics and Computer Science Faculty Research and Publications. 573.
https://epublications.marquette.edu/mscs_fac/573
ADA Accessible Version
Comments
Accepted version. Physiological Measurement, Vol. 38, No. 6 (May 2017): 1176-1192. DOI. © 2017 Institute of Physics and Engineering in Medicine. Used with permission.