Abstract

Magnetic resonance imaging and spectroscopy systems use coils, either singly or as arrays, to intercept radio-frequency (RF) magnetic flux from regions of interest, often deep within the body. Here, we show that a new magnetic material offers novel possibilities for guiding RF flux to the receiver coil, permitting a clear image to be obtained where none might otherwise be detectable. The new material contains microstructure designed according to concepts taken from the field of photonic band gap materials. In the RF range, it has a magnetic permeability that can be produced to specification while exhibiting negligible direct-current magnetism. The latter property is vital to avoid perturbing the static and audio-frequency magnetic fields needed to obtain image and spectral data. The concept offers a new paradigm for the manipulation of RF flux in all nuclear magnetic resonance systems.

Keywords

Magnetic fluxMagnetismRadio frequencyMagnetic fieldElectromagnetic coilNuclear magnetic resonanceMaterials sciencePermeability (electromagnetism)Flux (metallurgy)PhysicsCondensed matter physicsChemistryElectrical engineeringEngineering

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Publication Info

Year
2001
Type
article
Volume
291
Issue
5505
Pages
849-851
Citations
464
Access
Closed

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Cite This

M C K Wiltshire, J. B. Pendry, I. R. Young et al. (2001). Microstructured Magnetic Materials for RF Flux Guides in Magnetic Resonance Imaging. Science , 291 (5505) , 849-851. https://doi.org/10.1126/science.291.5505.849

Identifiers

DOI
10.1126/science.291.5505.849