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.
