Magnetic resonance RF probe with electromagnetically isolated tr

Details Magnetic resonance RF probe with electromagnetically isolated tr Magnetic resonance RF probe with electromagnetically isolated tr

1989-08-07

1991-02-26

Williams, Hezron E.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324322, G01R 3330

Patent

active

049964810

ABSTRACT:
An RF probe for use in magnetic resonance applications includes a transmitter coil for transmitting RF energy to excite a specimen and a receiver coil for sensing the RF energy absorbed or emitted by the specimen wherein the receiver coil is electrically decoupled from the transmitter coil through the geometrical shape and positioning of the receiver coil with respect to the transmitter coil. Both the transmitter and receiver coils are used to produce well defined RF magnetic fields. The technique includes the concept of physically locating multiple elements of either a transmitter or receiver coil such that the net current induced in the receiver coil is equal to zero. This technique is achieved in a frequency independent manner without orthogonally aligning the receiver coil with the transmitter coil, the coils being suitable for co-axial alignment as well as other alignments, much akin to prior art probes and thus readily adaptable to exisiting devices and protocols.

REFERENCES:
patent: 2220070 (1940-11-01), Aiken
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patent: 3826973 (1974-07-01), Pflaum
patent: 4093910 (1978-06-01), Hill
patent: 4620155 (1986-10-01), Edelstein
patent: 4636730 (1987-01-01), Bottomley
patent: 4887039 (1989-12-01), Roemer et al.
Article from the Journal of Magnetic Resonance, 64, 20-31, (1985), by Crowley, Evelhoch, and Ackerman entitled "The Surface-Coil NMR Receiver in the Presence of Homogenous B.sub.1 Excitation".
Article from Magnetic Resonance in Medicine 3, 590-603, (1986), by Froncisz, Jesmanowicz, Kneeland, and Hyde entitled "Counter Rotating Current Local Coils for High-Resolution Magnetic Resonance Imaging".
Article from Magnetic Resonance in Medicine 2, 402-409, (1985), by Styles, Scott, and Radda entitled "A Method for Localizing High-Resolution NMR Spectra from Human Subjects".
Article by Hyde, Froncisz, Jesmanowicz, and Kneeland entitled "Planar-Pair Local Coils for High-Resolution Magnetic Resonance Imaging, Particularly of the Temporomandibular Joint", Medical Physics, 13, (1986).
Article from the Journal of Magnetic Resonance 70, 512-517, (1986), by Hyde, Jesmanowicz, Froncisz, Kneeland, and Grist entitled "Parallel Image Acquisition from Noninteracting Local Coils".
Article from the Bulletin of Magnetic Resonance, Oct. 1986, by Bendall entitled "Surface Coil Techniques for in Vivo NMR".

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