Title:
磁気共鳴撮像装置、高周波磁場照射方法およびプログラム
Document Type and Number:
Japanese Patent JP5797765
Kind Code:
B2
Abstract:
With minimizing extension of imaging time, the B 1 non-uniformity reducing effect of RF shimming is maximized for an imaging section of an arbitrary axis direction and an arbitrary position. B 1 distributions are measured for only several sections of one predetermined direction, and a radio frequency magnetic field condition that maximizes the B 1 non-uniformity reducing effect for an imaging section of an arbitrary direction and an arbitrary position is calculated from the B 1 distribution data. For example, after B 1 distributions of only several sections of the AX direction are measured, the optimal radio frequency magnetic field condition for an imaging section of an arbitrary position for the AX direction is obtained by interpolation with optimal radio frequency magnetic field conditions calculated from B 1 distributions of two sections near the imaging section, and the optimal radio frequency magnetic field condition for an imaging section of an arbitrary position for the SAG or COR direction is obtained by using only B 1 values of a crossing region with the imaging section extracted from the B 1 distributions.
Inventors:
Yukio Kaneko
May woman Etsuhisa
Yoshitaka Bito
Hiroyuki Takeuchi
Tetsuhiko Takahashi
Shuta Habara
Yousuke Otake
May woman Etsuhisa
Yoshitaka Bito
Hiroyuki Takeuchi
Tetsuhiko Takahashi
Shuta Habara
Yousuke Otake
Application Number:
JP2013536022A
Publication Date:
October 21, 2015
Filing Date:
July 27, 2012
Export Citation:
Assignee:
Hitachi Medical Co., Ltd.
International Classes:
A61B5/055
Domestic Patent References:
| JP2007283104A | ||||
| JP2010508054A |
Foreign References:
| WO2003092497A1 | ||||
| WO2005082245A1 | ||||
| WO2010032172A1 |
Attorney, Agent or Firm:
Patent Business Corporation Sannozaka Patent Office