Main results: Microwave Metamaterials

Project EMET researchers have developed a method to improve the penetration of surface coils for magnetic resonance imaging. The method takes advantage of the ability of metamaterials to manipulate the magnetic field. The designed device acts as a “lens”, refocusing the signal coming from the resonant magnetic nuclear spins to a distant coil.

In the illustration, two knees are imaged using the same surface coil without (A) and with (B) the metamaterial device.

Figure (A)

Knee image

Figure (B)

Knee image

Manuel J. Freire, Ricardo Marques, and Lukas Jelinek “Experimental demonstration of a µ=-1 metamaterial lens for magnetic resonance imaging”, Applied Physics Letters, Vol. 93, pp. 231108(1)-231108(3) (2008).