Transverse-EPT: A local first order electrical properties tomography approach not requiring estimation of the incident fields
| Autor: | Xin An, Wyger M. Brink, Andrew G. Webb, Reijer Leijsen, Rob Remis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Transverse plane Acoustics 020208 electrical & electronic engineering 0202 electrical engineering electronic engineering information engineering 020206 networking & telecommunications 02 engineering and technology Tomography Condensed Matter Physics First order Electronic Optical and Magnetic Materials |
| Zdroj: | Progress in Electromagnetics Research, 102 Progress In Electromagnetics Research M |
| ISSN: | 1070-4698 |
| Popis: | A new local method for magnetic resonance electrical properties tomography (EPT), dubbed transverse-EPT (T-EPT), is introduced. This approach iteratively optimizes the dielectric properties (conductivity and permittivity) and the z-component of the electric field strength, exploiting the locally E-polarized field structure typically present in the midplane of a birdcage radiofrequency (RF) coil. In contrast to conventional Helmholtz-based EPT, T-EPT does not impose homogeneity assumptions on the object and requires only first order differentiation operators, which makes the method more accurate near tissue boundaries and more noise robust. Additionally, in contrast to integral equation-based approaches, estimation of the incident fields is not required. The EPT approach is derived from Maxwell’s equations and evaluated on simulated data of a realistic tuned RF coil model to demonstrate its potential. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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