In this paper we propose the adoption of magnetic metasurfaces, whose response is opportunely controlled in order to achieve a homogenized magnetic field distribution, for 1.5 T MRI applications. We firstly introduce the analytical guidelines required to design and control the metasurface response and then we perform full-wave simulations on an arrangement consisting of an actively fed RF coil and the metasurface. The numerical results demonstrate that the proposed solution is able to significantly enhance the RF magnetic field distribution, especially in terms of spatial homogeneity and amplitude. This solution can be extremely useful to enhance the MRI scanner performance by increasing both the covered Field of View and the signal-to-noise ratio.
Design of a Homogenized Magnetic Metasurface for the RF Magnetic Field Enhancement in 1.5 T MRI
Brizi D.;Monorchio A.
2021-01-01
Abstract
In this paper we propose the adoption of magnetic metasurfaces, whose response is opportunely controlled in order to achieve a homogenized magnetic field distribution, for 1.5 T MRI applications. We firstly introduce the analytical guidelines required to design and control the metasurface response and then we perform full-wave simulations on an arrangement consisting of an actively fed RF coil and the metasurface. The numerical results demonstrate that the proposed solution is able to significantly enhance the RF magnetic field distribution, especially in terms of spatial homogeneity and amplitude. This solution can be extremely useful to enhance the MRI scanner performance by increasing both the covered Field of View and the signal-to-noise ratio.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
