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Abstract #3532

Improving travelling wave efficiency at 7 T using dielectric material placed ”beyond” the region of interest

Rita Schmidt1 and Andrew Webb1

1Radiology, Leiden University Medical Center, Leiden, Netherlands

The concept of traveling-wave MRI has been introduced for ultra-high fields, enabling large field-of-view excitation and physical separation between the antenna and the subject. Several studies have shown that introducing additional materials/structures into the magnet bore or surrounding the subject can improve the efficiency. In this work we explore the use of high permittivity material placed behind the region of interest and show that it can be beneficial for traveling wave efficiency. Separating the region of improved efficiency from that of the dielectric allow positioning of a receive array in the close proximity to the region of interest, physically separate from the dielectric material.

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