Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1992-09-01
1994-07-19
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324300, G01R 3320
Patent
active
053312813
ABSTRACT:
A gradient magnetic field-generating coil assembly of MR imaging apparatus has a cylindrical core member for carrying coil windings that is divided into at least two cores at a central portion of a magnet bore, a gap is set up between the two cores at the central portion of the magnet bore and each core is provided at its opposite ends with parts for fixing it to the magnet, whereby the natural vibration frequency of the core can be deviated from an exciting force frequency and sound prevailing in the outside of the core and sound in the inside can be brought into interference with each other to thereby suppress vibration of the cores at the central portion of the magnet bore and reduce noise.
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Hitachi , Ltd.
Mah Raymond Y.
Tokar Michael J.
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