Gradient coil for NMR devices

Details Gradient coil for NMR devices Gradient coil for NMR devices

1997-07-10

1999-12-07

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324300, 324306, 324309, 324318, 324319, 324320, 324322, 335216, 335299, 600427, 600412, G01V 300

Patent

active

05998998&

ABSTRACT:
A gradient coil (1) to generate switched magnetic field gradients in an nuclear spin resonance (NMR) device consisting of one or several current paths (a, b) following windings and being arranged on the surface of a geometric body is characterized in that at least two electrical current paths (a, b) are provided for, running geometrically essentially parallel to each other and being electrically connected in parallel, which current paths cross n times per winding, wherein n is an integer with n.ltoreq.8, preferably n=1 or n=2. In this way, eddy current generation by current re-distributions on the gradient coil conductor strips and thereby a time-dependent distortion of the generated magnetic field gradient inside the volume of interest of the NMR apparatus is considerably reduced.

REFERENCES:
patent: 5323135 (1994-06-01), Schmidt
patent: 5334937 (1994-08-01), Peck et al.
patent: 5406205 (1995-04-01), Muller
patent: 5545997 (1996-08-01), Westphal
patent: 5563567 (1996-10-01), Westphal
patent: 5576623 (1996-11-01), Muller
patent: 5663648 (1997-09-01), Chapman
US Patent application S.N. 08/560,874 filed Nov. 20, 1995 "Gradient Coils for Therapy Tomographs".

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