RF shielded room for NMR imaging system
First Claim
1. A radio-frequency (RF) shielded room for use in a nuclear-magnetic-resonance (NMR) imaging system having magnet means having a bore therethrough and having first and second opposed surfaces respectively at the respective opposite ends of said magnet means bore, comprising:
- at least one electrically-conductive shield wall means for substantially enclosing a workroom volume adjacent to said magnet means bore first end without enclosing any portion of the bore of said magnet means, said at least one wall means having an aperture formed through at least a portion thereof, said aperture being substantially in registration with, and adjacent to, said magnet means bore first end; and
electrically-conductive means, extending at least partly through said magnet means bore from said first end toward said second end and conductively joined to the periphery of said wall means aperture, for substantially enclosing an imaging volume extending at least partly through said magnet means bore and joined to said workroom volume to form a unitary volume of the RF shielded room.
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Accused Products
Abstract
A radio-frequency shielded room for a nuclear magnetic resonance imaging system has at least one electrically-conductive shield wall substantially enclosing a predetermined volume adjacent to one end of the bore formed through an imaging magnet within which bore the imaging process is carried out. The at least one wall has an aperture therethrough substantially at and in registration with the one bore end. A hollow shield member, of an electrically-conductive material, extends through the magnet bore and has a first end region periphery aligned with and substantially electrically connected to the entire periphery of the aperture in the at least one wall. A second end of hollow shield member extends at least to the remaining end of the magnet bore, where it is enclosed with an electrically-conductive cap substantially electrically connected about the entire periphery of the hollow shield member second end. The at least one wall, the hollow shield member and the second end cap form a shielded room substantially completely enclosing the volume extending through the magnet bore and adjacent to one end thereof, which volume is effectively shielded from radio frequency signals emanating from outside the enclosed volume.
107 Citations
20 Claims
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1. A radio-frequency (RF) shielded room for use in a nuclear-magnetic-resonance (NMR) imaging system having magnet means having a bore therethrough and having first and second opposed surfaces respectively at the respective opposite ends of said magnet means bore, comprising:
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at least one electrically-conductive shield wall means for substantially enclosing a workroom volume adjacent to said magnet means bore first end without enclosing any portion of the bore of said magnet means, said at least one wall means having an aperture formed through at least a portion thereof, said aperture being substantially in registration with, and adjacent to, said magnet means bore first end; and electrically-conductive means, extending at least partly through said magnet means bore from said first end toward said second end and conductively joined to the periphery of said wall means aperture, for substantially enclosing an imaging volume extending at least partly through said magnet means bore and joined to said workroom volume to form a unitary volume of the RF shielded room. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification