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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Shen; Weijun
Address:
Florence, SC
No. of patents:
12
Patents:












Patent Number Title Of Patent Date Issued
7639013 Thermal controlling method, magnetic field generator and MRI apparatus December 29, 2009
With a view toward implementing a thermal controlling method for making reversible a temperature characteristic of a magnetic field generator using permanent magnets small in Hcj, a magnetic field generator whose temperature characteristic is reversible, using permanent magnets small
7196520 Method and apparatus for passive shimming of magnets March 27, 2007
An apparatus and method for shimming a magnetic field of a magnet in a volume of interest includes a nonmagnetic holder configured with an array of fluid containing pockets; and a solidified ferromagnetic fluid in each pocket of the array of fluid containing pockets, wherein the solidifi
7064550 Method and apparatus for field drift compensation of a superconducting magnet June 20, 2006
A method and apparatus for magnetic field drift compensation for a superconducting magnet system includes electrically coupling a micro-flux injection system to a secondary B.sub.0 superconducting coil in a secondary compensation circuit; magnetically coupling the secondary compensat
7001479 Methods and apparatus for assembling magnetized permanent magnetic blocks February 21, 2006
A method for bonding a plurality of magnetized blocks together includes providing at least two magnetized blocks, and bonding at least two magnetized blocks together using a door translatable in two orthogonal directions.
6960914 Methods and apparatus for imaging systems November 1, 2005
A method of operating an imaging system having a main coil and a shield coil electromagnetically coupled to the main coil, wherein the method includes monitoring for an external environmental fluctuation of electromagnetism, and controlling current flow through the main and shield co
6958672 System and method for magnetizing blocks on a magnet assembly of an MRI device October 25, 2005
A system and a method for magnetizing one of a plurality of substantially non-magnetized blocks disposed on a plate of a magnetic assembly used in an MRI device are provided. The system includes first and second arm portions operably coupled together. The system further includes a first
6956375 Magnetic resonance imaging magnetic field generator October 18, 2005
A magnetic field generator assembly includes a plurality of magnetic elements configured to collectively generate a magnetic field sufficient for diagnostic data acquisition and a non-magnetizable pane operationally connected to limit separation of one magnetic element from another m
6925873 Liquid helium level sensor for use in a cryogenic environment and method for assembling same August 9, 2005
The present invention provides a method and apparatus for measuring the level of a liquid cryogen. The invention provides for use of a current source (52), a length, or multiple lengths, of superconducting filament (40) situated within a cryostat (1) containing a cryogenic fluid (2) and
6859123 Methods and apparatus for positioning permanent magnetic blocks February 22, 2005
A method for positioning permanent magnetic blocks includes providing a plurality of magnetized blocks, positioning the magnetized blocks on a yoke in a row by applying a mechanical force at a first end of the row with a first clamping member and at a second end of the row with a second
6844801 Methods and apparatus for adjusting center magnetic field of a magnetic field generator for MRI January 18, 2005
A product line of MRI systems includes a first MRI system including a first yoke and a plurality of magnet blocks forming a first central assembly disposed on the first yoke. The product line also includes a second MRI system including a second yoke, a plurality of magnet blocks forming
6809619 System and method for adjusting magnetic center field for permanent MRI magnetic field generator October 26, 2004
The present invention relates to a method and system for adjusting a magnetic center field of a magnetic field generator in an MRI. One embodiment of the presenting invention relates to a magnetic field generator system having a magnetic center field. This embodiment comprises opposi
6664878 Method for assembling magnetic members for magnetic resonance imaging magnetic field generator December 16, 2003
Disclosed herein is a method for assembling a magnetic field generator for a magnetic resonance imaging system. The method comprises: establishing an arrangement for a permanent magnet of a magnet assembly comprising a ferromagnetic yoke plate and a permanent magnet, wherein the arrangem










 
 
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