Abstract #3565

Lenz lenses: RF field amplification and increased sensitivity using passive inductive elements

Peter T. While^1,2, Nils Spengler^3,4, and Jan G. Korvink³

¹Department of Radiology and Nuclear Medicine, St. Olav's University Hospital, Trondheim, Norway, ²IMTEK - Laboratory for Simulation, University of Freiburg, Freiburg, Germany, ³Institute of Microstructure Technology, Karlsruhe Institute of Technology, Karlsruhe, Germany, ⁴IMTEK - Laboratory for Microactuators, University of Freiburg, Freiburg, Germany

Lenz lenses are discrete elements that focus magnetic flux by virtue of their configuration. By the principle of reciprocity, Lenz lenses may be used to increase both B₁-field strength and receiver sensitivity in an NMR experiment. We present the theory that describes Lenz lenses and their geometrical optimization, plus some preliminary experimental results that demonstrate a three-fold increase in local SNR.

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