Nuclear magnetic resonance radio frequency antenna

Details Nuclear magnetic resonance radio frequency antenna Nuclear magnetic resonance radio frequency antenna

G - Physics

01

N

324/1

G01N 24/08 (2006.01) G01R 33/34 (2006.01) G01R 33/36 (2006.01)

Patent

CA 1230922

13 Nuclear Magnetic Resonance Radio Frequency Antenna Abstract A nuclear magnetic resonance radio frequency coil. The disclosed coil provides high frequency resonance signals for perturbing a magnetic field within the coil. The coil is impedance matched and tuned with adjustable capacitors. A balanced configuration is achieved with a co-axial cable chosen to phase shift an energization signal coupled to the coil. The preferred coil is a thin metallic foil having a shorting conductor, four wing conductors, and uniquely shaped parallel cross conductors connecting the shorting and wing conductors. When mounted to a rf transmissive plastic substrate and energized the coil produces a homogenous field within a region of interest the size of a patient head. A semi- circular balanced feedbar arrangement is used to minimize undesired field contributions.

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