WO2008004324A1 - Dispositif d'imagerie par résonance magnétique - Google Patents
Dispositif d'imagerie par résonance magnétique Download PDFInfo
- Publication number
- WO2008004324A1 WO2008004324A1 PCT/JP2006/325416 JP2006325416W WO2008004324A1 WO 2008004324 A1 WO2008004324 A1 WO 2008004324A1 JP 2006325416 W JP2006325416 W JP 2006325416W WO 2008004324 A1 WO2008004324 A1 WO 2008004324A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frequency
- magnetic field
- magnetic resonance
- pulse sequence
- imaging apparatus
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/483—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
- G01R33/485—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy based on chemical shift information [CSI] or spectroscopic imaging, e.g. to acquire the spatial distributions of metabolites
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/5607—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reducing the NMR signal of a particular spin species, e.g. of a chemical species for fat suppression, or of a moving spin species for black-blood imaging
Definitions
- Patent Document 1 Japanese Patent Laid-Open No. 63-230156
- Patent Document 2 JP 2002-291718
- Patent Document 1 uses a predicted value from the frequency fluctuation characteristic that is measured in advance before performing MRSI measurement, and therefore, when sudden frequency fluctuation that is difficult to predict occurs. Cannot obtain a sufficient correction effect.
- Patent Document 2 requires a long signal measurement time for directly measuring the resonance frequency for each MRI measurement, and there is a problem that the repetition time TR of measurement becomes long.
- the second pulse sequence is an MRSI pulse sequence or an MRS pulse sequence.
- it is an MRS less sequence that includes the application of at least one high-frequency magnetic field of the second frequency and the application of a phase encoding gradient magnetic field, and is repeated while changing the phase encoding gradient magnetic field.
- it includes the application of at least three high-frequency magnetic fields of the second frequency and the application of slice-selective gradient magnetic fields having different slice directions for each application of the high-frequency magnetic fields, and the cores of the intersecting regions in three different slice directions.
- This is an MRS pulse sequence that measures magnetic resonance signals. The invention's effect
- FIG. 1 is an external view of a magnetic resonance imaging apparatus to which the present invention is applied.
- Fig. 1 (a) shows a magnetic resonance imaging apparatus using a tunnel magnet that generates a static magnetic field with a solenoid coil.
- control unit 20 performs various operations such as Fourier transform and correction processing on the nuclear magnetic resonance signal received by the receiver 19 to obtain a spectrum, a spectrum image, etc. Is provided with a computer (spectrum calculation unit) 22, a determination unit 23 for determining frequency fluctuations, and a main control unit 25.
- a storage unit 30 for storing parameters and measurement conditions necessary for computation and control performed by the control unit 20, a display 40 for displaying spectrum information and image information generated by the computer 22, and a user command to the control unit 20
- An input device 50 is also provided.
- the storage unit 30 includes a main measurement signal storage unit 31 for storing a signal obtained from the main measurement (special information), a parameter storage unit 32 for storing parameters and the like, and signal information for storing signal strength information. There is a storage unit 33. The functions of these control units 20 will be described in detail below together with the operation of the magnetic resonance imaging apparatus.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- High Energy & Nuclear Physics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/307,809 US8400148B2 (en) | 2006-07-07 | 2006-12-20 | Magnetic resonance imaging apparatus |
JP2008523596A JP4808254B2 (ja) | 2006-07-07 | 2006-12-20 | 磁気共鳴撮影装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-187463 | 2006-07-07 | ||
JP2006187463 | 2006-07-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008004324A1 true WO2008004324A1 (fr) | 2008-01-10 |
Family
ID=38894300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/325416 WO2008004324A1 (fr) | 2006-07-07 | 2006-12-20 | Dispositif d'imagerie par résonance magnétique |
Country Status (3)
Country | Link |
---|---|
US (1) | US8400148B2 (ja) |
JP (1) | JP4808254B2 (ja) |
WO (1) | WO2008004324A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101343029B1 (ko) * | 2011-11-08 | 2013-12-18 | 한국과학기술원 | 자기 공명 영상 장치 및 그 제어 방법 |
JP7018297B2 (ja) * | 2017-11-16 | 2022-02-10 | 日本電子株式会社 | スペクトル解析装置及び方法 |
JP6817243B2 (ja) * | 2018-02-28 | 2021-01-20 | 日本電子株式会社 | スペクトル処理装置及び方法 |
CN112244812B (zh) * | 2020-10-19 | 2023-08-22 | 上海联影医疗科技股份有限公司 | 磁共振成像方法、磁共振成像系统和电子装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04102442A (ja) * | 1990-08-23 | 1992-04-03 | Toshiba Corp | 磁気共鳴スペクトロスコピー装置 |
JP2004254884A (ja) * | 2003-02-26 | 2004-09-16 | Ge Medical Systems Global Technology Co Llc | 磁気共鳴撮影装置 |
WO2005000116A1 (ja) * | 2003-06-30 | 2005-01-06 | Hitachi Medical Corporation | 磁気共鳴撮影装置 |
WO2006040866A1 (ja) * | 2004-10-13 | 2006-04-20 | Hitachi Medical Corporation | 磁気共鳴撮影装置及び磁気共鳴撮影方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2528864B2 (ja) | 1987-03-20 | 1996-08-28 | 株式会社日立製作所 | 核磁気共鳴を用いた検査装置 |
US4885542A (en) * | 1988-04-14 | 1989-12-05 | The Regents Of The University Of California | MRI compensated for spurious NMR frequency/phase shifts caused by spurious changes in magnetic fields during NMR data measurement processes |
JPH05116A (ja) * | 1991-06-24 | 1993-01-08 | Matsushita Electric Works Ltd | 厨房収納装置 |
JP3858194B2 (ja) * | 2001-04-04 | 2006-12-13 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | Mri装置 |
US6472872B1 (en) * | 2001-06-29 | 2002-10-29 | Mayo Foundation For Medical Education And Research | Real-time shimming of polarizing field in magnetic resonance system |
US7218110B2 (en) * | 2005-09-02 | 2007-05-15 | Toshiba America Mri, Inc. | Method and apparatus for diffusion magnetic resonance imaging with the effects of eddy currents compensated |
-
2006
- 2006-12-20 JP JP2008523596A patent/JP4808254B2/ja not_active Expired - Fee Related
- 2006-12-20 WO PCT/JP2006/325416 patent/WO2008004324A1/ja active Application Filing
- 2006-12-20 US US12/307,809 patent/US8400148B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04102442A (ja) * | 1990-08-23 | 1992-04-03 | Toshiba Corp | 磁気共鳴スペクトロスコピー装置 |
JP2004254884A (ja) * | 2003-02-26 | 2004-09-16 | Ge Medical Systems Global Technology Co Llc | 磁気共鳴撮影装置 |
WO2005000116A1 (ja) * | 2003-06-30 | 2005-01-06 | Hitachi Medical Corporation | 磁気共鳴撮影装置 |
WO2006040866A1 (ja) * | 2004-10-13 | 2006-04-20 | Hitachi Medical Corporation | 磁気共鳴撮影装置及び磁気共鳴撮影方法 |
Also Published As
Publication number | Publication date |
---|---|
US8400148B2 (en) | 2013-03-19 |
JPWO2008004324A1 (ja) | 2009-12-03 |
JP4808254B2 (ja) | 2011-11-02 |
US20100026296A1 (en) | 2010-02-04 |
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