Title:
磁気共鳴イメージング装置及び磁気共鳴イメージング方法
Document Type and Number:
Japanese Patent JP5518403
Kind Code:
B2
Abstract:
An MRI apparatus and method reduces eddy currents generated by changing gradient magnetic fields used to image an object. Positioning image data from a pilot imaging mode is used to set reference imaging conditions for a subsequent actual diagnostic imaging mode used to acquire diagnostic image data. An eddy current stimulus index is calculated for a gradient magnetic field polarity successively (i.e., iteratively) renewed (i.e., changed) by renewal of imaging conditions and phase-encoding direction. Diagnostic image data is generated during an actual diagnostic imaging mode based on a gradient magnetic field polarity and phase-encoding direction that provides the lowest eddy current stimulus index value, thus using an optimum set of imaging conditions.
Inventors:
Kasai Yumori
Application Number:
JP2009200779A
Publication Date:
June 11, 2014
Filing Date:
August 31, 2009
Export Citation:
Assignee:
Toshiba Corporation
Toshiba Medical Systems Corporation
Toshiba Medical Systems Corporation
International Classes:
A61B5/055
Domestic Patent References:
| JP2001070282A | ||||
| JP2006280820A | ||||
| JP2006524089A | ||||
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| JP2261430A | ||||
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Foreign References:
| WO2009081379A2 | ||||
| US6762605 | ||||
| US6841999 |
Attorney, Agent or Firm:
Fujiwara Yasutaka