Surface coil arrangement for use in a nuclear magnetic resonance

Details Surface coil arrangement for use in a nuclear magnetic resonance Surface coil arrangement for use in a nuclear magnetic resonance

1989-09-20

1991-04-09

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, G01R 3334

Patent

active

050068059

ABSTRACT:
A surface coil arrangement for use in a nuclear mangetic resonance apparatus includes two identically constructed surface coils arranged geometrically anti-parallel and electrically connected to each other so that radio-frequency magnetic fields which penetrate both coils do not generate any resultant (difference) current. Each surface coil is formed by a coaxial line section in a loop, with the jacket shielding of the coaxial line having a gap at one location in the loop. Both the inner conductor and the jacket shielding at one end of each section are electrically connected to the jacket shielding at the other end of that coaxial line section.

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"Doubly Tuned Local Coils for MRI and MRS at 1.5 T," Grist, Magnetic Resonance Medicine, vol. 6, No. 3, Mar. 1988, pp. 253-264.
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"Rotator Cuff Tears: Preliminary Application of High-Resolution MR Imaging with Counter Rotating Current Loop-Gap Resonators," Kneeland et al., Radiology, 1986, pp. 695-699.

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