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Title:
MAGNETIC RESONANCE IMAGING APPARATUS AND REGION-IMAGING METHOD
Document Type and Number:
WIPO Patent Application WO/2013/105384
Kind Code:
A1
Abstract:
In order to comply with imaging conditions and reduce deterioration of image quality due to static magnetic field heterogeneity without increasing operator workload: a shimming current that reduces the static magnetic field heterogeneity of a selected region is determined; the selected region is shimmed using the determined local BO shimming current; and the irradiation phase increment (RF-Phase) or the post-adjustment excitation frequency (f0'), which is the excitation frequency, of the RF pulse that excites the selected region is determined when the static magnetic field heterogeneity of the selected region is reduced. The irradiation phase increment (RF-Phase) and the post-adjustment excitation frequency (f0'), which is the excitation frequency, are quantities that correspond with each other.

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Inventors:
NAKANISHI KENJI (JP)
ITAGAKI HIROYUKI (JP)
NISHIHARA TAKASHI (JP)
Application Number:
PCT/JP2012/082139
Publication Date:
July 18, 2013
Filing Date:
December 12, 2012
Export Citation:
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Assignee:
HITACHI MEDICAL CORP (JP)
International Classes:
A61B5/055
Foreign References:
JP2011229632A2011-11-17
JP2003210431A2003-07-29
JP2005152175A2005-06-16
JP2009050605A2009-03-12
Other References:
N. K. BANGERTER: "SNR Analysis of Multiple Acquisition SSFP", PROCEEDINGS OF INTERNATIONAL SOCIETY FOR MAGNETIC RESONANCE IN MEDICINE, 18 May 2002 (2002-05-18)
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