Cryogenic MRI magnets
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United States of America Patent
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Apr 7, 1998
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N/A
app pub date -
Nov 13, 1995
filing date -
Nov 29, 1994
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Abstract
An electromagnet for use in an MRI apparatus includes an annular vessel inside of which annular windings, energizable to produce a magnetic field, are contained together with cold iron components. The iron components are mechanically anchored with respect to the windings. A pair of iron rings is positioned so that one ring is provided at each end of the magnet in close proximity to the annular windings. The rings are formed so as to define a flared opening at each end of a cylindrical space within the magnet which, in use of the magnet for MRI purposes, is occupied by a patient.
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