Title:
MAGNETIC RESONANCE IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/044501
Kind Code:
A1
Abstract:
A magnetic resonance imaging device includes: magnetic field generation means and
control means for controlling reception means according to a predetermined pulse
sequence. The predetermined pulse sequence includes an unnecessary material suppressing
sequence unit for erasing a signal from an unnecessary material which is not a
measurement object and a main imaging sequence unit for measuring a nuclear magnetic
resonance signal used for creation of an examinee. The unnecessary material
suppressing sequence unit generates two or more high-frequency magnetic field
pulses so as to spatially homogenize the magnetization of the unnecessary material
in the imaging space when a first high-frequency magnetic pulse is applied in
the main imaging sequence unit. The magnetic resonance imaging device further includes
adjusting means for adjusting a flip angle of the two or more high-frequency magnetic
field pulses. The control means applies the two or more high-frequency magnetic
pulses with the flip angle adjusted by the adjusting means.
Inventors:
ABE TAKAYUKI (JP)
TAKEUCHI HIROYUKI (JP)
TAKAHASHI TETSUHIKO (JP)
TAKEUCHI HIROYUKI (JP)
TAKAHASHI TETSUHIKO (JP)
Application Number:
PCT/JP2007/069056
Publication Date:
April 17, 2008
Filing Date:
September 28, 2007
Export Citation:
Assignee:
HITACHI MEDICAL CORP (JP)
ABE TAKAYUKI (JP)
TAKEUCHI HIROYUKI (JP)
TAKAHASHI TETSUHIKO (JP)
ABE TAKAYUKI (JP)
TAKEUCHI HIROYUKI (JP)
TAKAHASHI TETSUHIKO (JP)
International Classes:
A61B5/055
Foreign References:
| JP2002263079A | 2002-09-17 | |||
| JP2000014657A | 2000-01-18 | |||
| JPH07289534A | 1995-11-07 | |||
| JPH07289534A | 1995-11-07 |
Other References:
LI T. ET AL.: "Real-time Compensation for B0 Field Drift in Proton Echo Planar Spectroscopic Imaging Improves Water Suppression Efficiency", PROC. INTL. SOC. MAG. RESON. MED., vol. 13, May 2005 (2005-05-01), pages 2524, XP008101336
"Design of Adiabatic Pulses for Fat-Suppression Using Analytic Solutions of the Bloch Equation", MRM, vol. 37, pages 797 - 801
"Combined Chemical-Shift and Phase-Selective for Fat Suppression", THEORY AND INITIAL CLINICAL EXPERIENCE, RADIOLOGY, vol. 181, 1991, pages 41 - 47
"Mapping of the Radiofrequency Field", JMR, vol. A103, 1993, pages 82 - 85
"Design of Adiabatic Pulses for Fat-Suppression Using Analytic Solutions of the Bloch Equation", MRM, vol. 37, pages 797 - 801
"Combined Chemical-Shift and Phase-Selective for Fat Suppression", THEORY AND INITIAL CLINICAL EXPERIENCE, RADIOLOGY, vol. 181, 1991, pages 41 - 47
"Mapping of the Radiofrequency Field", JMR, vol. A103, 1993, pages 82 - 85
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