Nuclear magnetic resonance apparatus having semitoroidal rf...

Details Nuclear magnetic resonance apparatus having semitoroidal rf... Nuclear magnetic resonance apparatus having semitoroidal rf...

G - Physics

01

N

324/1

G01N 24/08 (2006.01) G01R 33/34 (2006.01) G01R 33/483 (2006.01)

Patent

CA 1210061

NUCLEAR MAGNETIC RESONANCE APPARATUS HAVING SEMITOROIDAL RF COIL FOR USE IN TOPICAL NMR AND NMR IMAGING ABSTRACT OF THE DISCLOSURE An improved nuclear magnetic resonance (NMR) apparatus for use in topical magnetic resonance (TMR) spectroscopy and other remote sensing NMR applications includes a semi- toroidal radio frequency (rf) coil. The semitoroidal rf coil produces an effective alternating magnetic field at a distance from the poles of the coil, so as to enable NMR measurements to be taken from selected regions inside an object, particularly including human and other living sub- jects. The semitoroidal rf coil is relatively insensitive to magnetic interference from metallic objects located behind the coil, thereby rendering the coil particularly suited for use in both conventional and superconducting NMR magnets. The semitoroidal NMR coil can be constructed so that it emits little or no excess rf electric field associated with the rf magnetic field, thus avoiding adverse effects due to dielectric heating of the sample or to any other interaction of the electric field with the sample.

449961

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