| Patent Number |
Title Of Patent |
Date Issued |
| 7570141 |
Method of designing a shim coil to reduce field settling time |
August 4, 2009 |
| A shim coil design technique determines a position and a geometry of a room temperature (RT) shim coil to provide both a desired field homogeneity and a desired B.sub.0 field setting time. The simultaneous satisfaction of both field homogeneity and field settling time is achieved wit |
| 7439836 |
Magnetic field generating apparatus for magnetic resonance imaging |
October 21, 2008 |
| A Magnetic Resonance Imaging (MRI) system is disclosed. The MRI system includes a cryogenic magnet assembly with a cryogenic vessel housing a superconducting magnet. Disposed radially inboard of the cryogenic magnet assembly are a gradient coil module and a plurality of room temperature |
| 6965236 |
MRI system utilizing supplemental static field-shaping coils |
November 15, 2005 |
| A magnetic resonance imaging system (10) includes a superconducting magnet (14) that generates a static magnetic field. A gradient coil assembly (50) with an associated patient bore enclosure (18) and a gradient coil (52) that generates a gradient magnetic field in the patient bore (18). |
| 6914431 |
MRI system with pulsed readout magnet |
July 5, 2005 |
| A Magnetic Resonance Imaging (MRI) system 50 is provided including a superconducting magnet coil assembly 54. The magnet coil assembly 54 includes a superconducting magnet 82 and forms an imaging volume 60. The superconducting magnet 82 generates a polarizing field in the imaging vol |
| 6850066 |
Systems and methods for gradient compensation in magnetic resonance imaging |
February 1, 2005 |
| A gradient compensation system comprising a magnet assembly, at least one field-generating gradient coil operable for generating magnetic field gradients in three orthogonal coordinates, and at least one gradient compensation coil positioned adjacent to the magnet assembly and operable |
| 6822446 |
MRI magnet vibration induced field instability simulator |
November 23, 2004 |
| A Magnetic Resonance Imaging (MRI) magnet field instability simulator (80) is provided. The simulator includes a rigid body motion generator (82) that simulates motion of one or more MRI system components. An eddy current analyzer (84) generates a magnetic stiffness and damping signal |
| 6636136 |
Mechanical stabilizer-tuned damper for high field open magnet |
October 21, 2003 |
| A mechanical stabilizer-tuned damper is attachable to the first upper magnet assembly of a high field open magnet, which magnet includes a first upper magnet assembly, a lower second magnet assembly and at least one non-magnetizable support beam therebetween. The mechanical stabilize |
| 5900792 |
Magnetic field homogeneity correction for superconducting magnet |
May 4, 1999 |
| Magnetic field homogeneity correction system including coils for a superconducting magnet assembly are wound on the same coil forms as the axially spaced main magnet coils such that they are superimposed radially to simplify the system including design requirements for associated pas |
| 5565831 |
Shielded and open MRI magnet |
October 15, 1996 |
| A shielded and open magnetic resonance imaging (MRI) magnet having two spaced-apart, generally toroidal-shaped superconductive coil assemblies. Each coil assembly has a coil housing containing a generally annular-shaped superconductive main and a radially-outwardly spaced-apart shiel |
| 5488339 |
Passive shielding of mobile magnetic resonance imaging magnet |
January 30, 1996 |
| A lightweight passive magnetic shielding system for a mobile magnetic resonance imaging (MRI) superconducting magnet is provided to enable transportation of the MRI while at superconducting operation within the regulations limiting the strength of the stray magnetic field of the MRI |
| 5389909 |
Open architecture magnetic resonance imaging passively shimmed superconducting magnet assembly |
February 14, 1995 |
| A passively shimmed open architecture magnetic resonance imaging magnet utilizing separated superconducting coil assemblies with open space between including apparatus to obtain field homogeneity in the open space by a non-magnetic cylinder in the bore of the magnets for positioning |
