| US 7,541,812 B2 | ||
| MRI apparatus, NMR analyzer, and gantry | ||
| Kazuto Nogami, Nasushiobara (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Minato-Ku, Tokyo (Japan); and Toshiba Medical Systems Corporation, Otawara-Shi, Tochigi (Japan) | ||
| Filed on Jan. 31, 2008, as Appl. No. 12/10,959. | ||
| Claims priority of application No. 2007-031875 (JP), filed on Feb. 13, 2007; and application No. 2007-300458 (JP), filed on Nov. 20, 2007. | ||
| Prior Publication US 2008/0191698 A1, Aug. 14, 2008 | ||
| Int. Cl. G01V 3/00 (2006.01) | ||
| U.S. Cl. 324—319 [324/318] | 25 Claims |
| 1. A magnetic resonance imaging apparatus comprising:
a static magnetic field generating unit that generates a static magnetic field within a bore;
a gradient magnetic coil that applies a gradient magnetic field to a test subject arranged in the static magnetic field;
a radio frequency coil that receives a magnetic resonance signal from the test subject to which the gradient magnetic field
is applied; and
a shimming structure unit that adjusts static magnetic field uniformity, wherein the shimming structure unit includes
a first magnetic member disposed between a main coil and a shield coil of the gradient magnetic coil and disposed in a central
axial center of the static magnetic field; and
a second magnetic member disposed on an outer side of the main coil and the shield coil and disposed on a central axial end
of the static magnetic field generating unit.
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