Abstract #3511

A multisegment detunable HEM-mode dielectric resonator for increased patient comfort at 7 T

Rita Schmidt¹, Wouter M. Teeuwisse¹, and Andrew Webb¹

¹Radiology, Leiden University Medical Center, Leiden, Netherlands

At ultrahigh field (≥7T) cavity- and waveguide-based RF coils become possible to construct, and have the advantage that simple designs can be used. One such design uses materials with a high dielectric constant. So far only completely circular structures have been produced; to improve the usability of such a dielectric resonator, it is important to be able to design a splittable and easily detunable resonator. In this work, we tested designs that allow splitting of the cylinder to sections, while maintaining the circularly polarized RF field. In-vivo measurements of the knee at 7 Tesla showed the feasibility of this approach.

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