| 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 |
