| 摘要 |
The present invention is directed to a tunable electromagnetic device for use in magnetic resonance imaging comprising a primary element (20) electrically coupled to an electromagnetic field generator (32), and a secondary element (10) positioned proximate the primary element, such that the two are inductively coupled. The secondary element is non- tunable, and preferably provided with a coating (16) to allow the element to be implanted within tissue. The primary element comprises tuning and matching circuitry (34, 36, 38) to vary the resonance frequency between the two elements to provide an inductive over- coupling between the two to provide a high resolution magnetic resonance image. Also disclosed is an associated method of using the system.
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