Developments in electrical-property tomography based on the contrast-source inversion method

Developments in electrical-property tomography based on the contrast-source inversion method

Leijsen, R.L. (Leiden University Medical Center)
Fuchs, P.S. (TU Delft Signal Processing Systems)
Brink, Wyger (Leiden University Medical Center)
Webb, A. (Leiden University Medical Center)
Remis, R.F. (TU Delft Signal Processing Systems)

2019

The main objective of electrical-property tomography (EPT) is to retrieve dielectric tissue parameters from B ₁ ⁺ data as measured by a magnetic-resonance (MR) scanner. This is a so-called hybrid inverse problem in which data are defined inside the reconstruction domain of interest. In this paper, we discuss recent and new developments in EPT based on the contrast-source inversion (CSI) method. After a short review of the basics of this method, two- and three-dimensional implementations of CSI-EPT are presented along with a very efficient variant of 2D CSI-EPT called first-order induced current EPT (foIC-EPT). Practical implementation issues that arise when applying the method to measured data are addressed as well, and the limitations of a two-dimensional approach are extensively discussed. Tissue-parameter reconstructions of an anatomically correct male head model illustrate the performance of two- and three-dimensional CSI-EPT. We show that 2D implementation only produces reliable reconstructions under very special circumstances, while accurate reconstructions can be obtained with 3D CSI-EPT.

Contrast-source inversion
Electrical-property tomography
Electromagnetic inverse scattering problems
Magnetic resonance imaging
Nonlinear optimization

http://resolver.tudelft.nl/uuid:9e729808-d97f-4c16-839a-d3bfe288a576

https://doi.org/10.3390/jimaging5020025

2313-433X

Journal of Imaging, 5 (2), 1-19

Institutional Repository

journal article

© 2019 R.L. Leijsen, P.S. Fuchs, Wyger Brink, A. Webb, R.F. Remis