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Zusammenfassung:
A torus-shaped dielectric resonator is introduced and a proof of concept is given for imaging at 7T. Due to the relatively high frequency of 300 MHz, water can be used as a dielectric while the torus has practical dimensions. Experimental B1+ patterns show good comparison to those obtained in numerical simulations. In-vivo images of the human calf at 7T are obtained using the torus as a transmit/receive coil.