Al writes: "Manuel Freire at the University of Seville in Spain and colleagues are using a metamaterial lens to focus radio frequency magnetic fields in order to boost the resolution of MRI machines. The lens is a metamaterial slab made of a repeating periodic structure, the details of which the authors do not give. However, the results are clear to see in images taken of the knees belonging to one of the authors, in which the focusing slab is placed between the knees. The say that placing a lens between the breasts could similarly improve the resolution of breast images, a potentially important and useful breakthrough."
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