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Comparing D-bar and common regularization-based methods for electrical impedance tomography
OBJECTIVE: To compare D-bar difference reconstruction with regularized linear reconstruction in electrical impedance tomography. APPROACH: A standard regularized linear approach using a Laplacian penalty and the GREIT method for comparison to the D-bar difference images. Simulated data was generated...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6800026/ https://www.ncbi.nlm.nih.gov/pubmed/30925491 http://dx.doi.org/10.1088/1361-6579/ab14aa |
Sumario: | OBJECTIVE: To compare D-bar difference reconstruction with regularized linear reconstruction in electrical impedance tomography. APPROACH: A standard regularized linear approach using a Laplacian penalty and the GREIT method for comparison to the D-bar difference images. Simulated data was generated using a circular phantom with small objects, as well as a ‘Pac-Man’ shaped conductivity target. An L-curve method was used for parameter selection in both D-bar and the regularized methods. MAIN RESULTS: We found that the D-bar method had a more position independent point spread function, was less sensitive to errors in electrode position and behaved differently with respect to additive noise than the regularized methods. SIGNIFICANCE: The results allow a novel pathway between traditional and D-bar algorithm comparison. |
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