Numerical Investigation of a self-detuning Signal Enhancement Metasurface for 3T MRI

Endri Stoja,Dennis Philipp,Diego Betancourt,Simon Konstandin,Robin Niklas Wilke, Reinhold Umathum,Jurgen Jenne,Thomas Bertuch,Matthias Gunther

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science（2020）

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摘要

In this work, numerical simulation results regarding an automatically self-detuning signal enhancement plate (DSEP) for use in magnetic resonance imaging at 3T field are presented. The DSEP is composed of a linear alignment of wire resonators milled on a suitable PCB and inductively coupled to a varactor-loaded detuning loop. Eigenmode simulations allow to design the coupled system, whereas full-wave simulations of the device, excited by a circularly-polarized plane wave in the pres-ence of a phantom, show the detuning efficiency. In terms of H-field magnitude, a maximal enhancement factor of about four is observed at the target frequency of 123.5 MHz.

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关键词

numerical investigation,self-detuning signal enhancement metasurface,automatically self-detuning signal enhancement plate,DSEP,magnetic resonance imaging,linear alignment,wire resonators,eigenmode simulations,coupled system,full-wave simulations,circularly-polarized plane wave,detuning efficiency,H-field magnitude,maximal enhancement factor,MRI,varactor-loaded detuning loop,frequency 123.5 MHz

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