| US 7,557,575 B2 | ||
| Magnetic resonance imaging apparatus and magnetic resonance imaging method | ||
| Masashi Ookawa, Otawara (Japan); and Hitoshi Kanazawa, Utsunomiya (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Minato-Ku, Tokyo (Japan); and Toshiba Medical Systems Corporation, Otawara-Shi, Tochigi-Ken (Japan) | ||
| Filed on Mar. 27, 2007, as Appl. No. 11/727,441. | ||
| Claims priority of application No. 2006-103271 (JP), filed on Apr. 04, 2006. | ||
| Prior Publication US 2007/0229075 A1, Oct. 04, 2007 | ||
| Int. Cl. G01V 3/00 (2006.01) | ||
| U.S. Cl. 324—309 [324/307; 324/312] | 8 Claims |
| 1. A magnetic resonance imaging apparatus comprising:
a data acquisition unit configured to acquire pieces of echo data due to nuclear magnetic resonance after applying an excitation
pulse;
a frequency offset acquisition unit configured to acquire a frequency offset;
a frequency modulation unit configured to frequency-modulate the excitation pulse according to the frequency offset based
on echo data acquired by a pre-scan; and
a phase shift correction unit configured to cancel a phase shift occurring on each of the pieces of the echo data due to a
frequency modulation according to the frequency offset during a readout of the pieces of the echo data.
|