US 7,514,929 B2
Magnetic resonance imaging apparatus and static magnetic field correction method
Shigehide Kuhara, Otawara (Japan); Hirofumi Anno, Toyoake (Japan); and Masato Ikedo, Otawara (Japan)
Assigned to Kabushiki Kaisha Toshiba, Minato-Ku, Tokyo (Japan); and Toshiba Medical Systems Corporation, Otawara-Shi, Tochigi (Japan)
Filed on Jan. 16, 2007, as Appl. No. 11/653,430.
Claims priority of application No. 2006-007911 (JP), filed on Jan. 16, 2006.
Prior Publication US 2007/0164744 A1, Jul. 19, 2007
Int. Cl. G01V 3/00 (2006.01)
U.S. Cl. 324—320  [324/309] 15 Claims
OG exemplary drawing
 
1. A magnetic resonance imaging apparatus adapted to reconstruct an image associated with a subject placed in a static magnetic field on the basis of magnetic resonance signals emitted from the subject, said apparatus comprising:
a collector which collects magnetic resonance signals emitted from a region of interest of the subject; and
a correction magnetic field generator which generates a correction magnetic field to correct the nonuniformity of the static magnetic field on the basis of magnetic resonance signals which (a) are contained in the magnetic resonance signals collected by the collector, and (b) are emitted from within a specific smaller region which contains only a portion of the region of interest.