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In this work a mu=-1 metamaterial (MM) lens for magnetic resonance imaging(MRI) is demonstrated. MRI uses surface coils to detect the radiofrequency(RF)energy absorbed and emitted by the nuclear spins in the imaged object. Theproposed MM lens manipulates the RF field detected by these surface coils, sothat the coil sensitivity and spatial localization is substantially improved.Beyond this specific application, we feel that the reported results are theexperimental confirmation of a new concept for the manipulation of RF field inMRI, which paves the way to many other interesting applications.

Experimental demonstration of a mu=-1 metamaterial lens for magnetic resonance imaging