Impact of Multiple Layers of High-Permittivity Materials on the EM Fields Transmission for Magnetic Resonance Imaging Applications

High-Permittivity Materials have been used to increase and manipulate the radiofrequency field B1 in Magnetic Resonance Imaging scans. In this work we have explored the possibility to enhance the B1 field even more by using High-Permittivity Pads with different permittivities positioned at different distance from the sample. We have tested this hypothesis by optimizing the permittivity of three layers of a 2D analytical solution, where infinitely long concentric cylinders are excited by a conducting wire. As a result, we have found an increase of the B1 field of about 8% in the center of symmetry of the cylinders.