MEMS Helmholtz coils for magnetic resonance imaging
نویسندگان
چکیده
Miniature coils for magnetic resonance imaging and spectroscopy are demonstrated. A rectangular Helmholtz arrangement based on a pair of substrates separated by spherical alignment spacers is investigated. An optimal geometry is developed using simple theory and verified by numerical analysis. Prototypes are fabricated using silicon substrates shaped by anisotropic etching to form a trough to hold an internal sample and pits for use as alignment features, and carrying Cu/Au conductors fabricated by electroplating. Q values of 11 are obtained, and devices containing an internal proton source are developed for use as fiducial markers in 1H magnetic resonance imaging at 1.5 T. Magnetic resonance spectroscopy is also performed on the internal source, with a SNR of ≈85.
منابع مشابه
Mems Helmholtz Coils for Magnetic Resonance Spectroscopy
Miniature coils for use in magnetic resonance spectroscopy have been constructed in a rectangular Helmholtz arrangement based on a pair of substrates separated by spherical alignment spacers. An optimal geometry has been developed using simple theory and verified by numerical analysis. Prototype devices have been fabricated using silicon substrates shaped by anisotropic etching to form a samp...
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