Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1999-07-06
2000-12-12
Oda, Christine
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324322, G01V 300
Patent
active
061603996
ABSTRACT:
In an MR system, a mounting assembly is provided at each end of the bore of the main magnet for supporting a cylindrical gradient coil assembly within the bore. Each mounting assembly comprises first and second brackets, the first bracket being provided with a concave bearing surface having a specified curvature. The first bracket is fixably joined to the main magnet proximate to the lower side of the bore, and the second bracket is provided with a convex bearing surface which is selectively similar to the curvature of the concave bearing surface of the first bracket. The second bracket is attached to a lower portion of the gradient coil, so that the convex bearing surface extends longitudinally outward from the gradient coil assembly. A vibration attenuator is positioned between the convex and concave bearing surfaces of each mounting assembly, the vibration attenuator acting to transmit a static force between the two bearing surfaces to support the gradient coil assembly within the bore. At the same time, the vibration attenuator acts to oppose transmission of mechanical vibrations from the gradient coil assembly to the main magnet. The vibration attenuator comprises first and second pads formed of elastomeric vibration isolation material, which are joined together in a stacked interlocking relationship.
REFERENCES:
patent: 5084676 (1992-01-01), Saho et al.
patent: 5235283 (1993-08-01), Lehne et al.
patent: 5570021 (1996-10-01), Dachniwskyj et al.
patent: 5792210 (1998-08-01), Pla et al.
Dean David E.
Mansell Scott T.
Radziun Michael J.
Cabou Christian G.
General Electric Company
Oda Christine
Price Phyllis Y.
Shrivastav Brij B.
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