Surface gradient assembly for high speed nuclear magnetic resona

Electricity: measuring and testing – Particle precession resonance – Spectrometer components

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G01R 3320

Patent

active

049261258

ABSTRACT:
A novel surface gradient assembly for high-speed, high-resolution NMR imaging has at least one substantially planar gradient coil. Each of the planar coils is disposed substantially parallel to any other planar coil of the assembly, and in a chosen plane of two selected Cartesian coordinates. Thus, one or more, planar coils lying in, say, the XZ plane can provide a magnetic gradient field in 1, 2 or all 3 of the X, Y and/or Z directions. Each coil can be formed of 1, 2, 4 or more windings, each of which is a "fingerprint" coil of configuration established by current-flow stream functions. An RF shield can be placed between the substantially planar gradient coil(s) and a RF antenna, to prevent interaction between the antenna and gradient coils, so that the quality factor (Q) of the RF antenna is not appreciable lowered.

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