JPH0351176B2 - - Google Patents
Info
- Publication number
- JPH0351176B2 JPH0351176B2 JP61270030A JP27003086A JPH0351176B2 JP H0351176 B2 JPH0351176 B2 JP H0351176B2 JP 61270030 A JP61270030 A JP 61270030A JP 27003086 A JP27003086 A JP 27003086A JP H0351176 B2 JPH0351176 B2 JP H0351176B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- gradient
- region
- phase
- encoding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 35
- 238000009825 accumulation Methods 0.000 claims description 11
- 230000001788 irregular Effects 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 230000005284 excitation Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims 1
- 238000003384 imaging method Methods 0.000 description 10
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 8
- 230000001133 acceleration Effects 0.000 description 6
- 238000012937 correction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002592 echocardiography Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000017531 blood circulation Effects 0.000 description 3
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 210000000709 aorta Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000013383 initial experiment Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000000115 thoracic cavity Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- G01R33/54—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
- G01R33/565—Correction of image distortions, e.g. due to magnetic field inhomogeneities
- G01R33/56509—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to motion, displacement or flow, e.g. gradient moment nulling
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- High Energy & Nuclear Physics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US798544 | 1985-11-15 | ||
| US06/798,544 US4731583A (en) | 1985-11-15 | 1985-11-15 | Method for reduction of MR image artifacts due to flowing nuclei by gradient moment nulling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62161354A JPS62161354A (ja) | 1987-07-17 |
| JPH0351176B2 true JPH0351176B2 (US06168655-20010102-C00055.png) | 1991-08-06 |
Family
ID=25173671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61270030A Granted JPS62161354A (ja) | 1985-11-15 | 1986-11-14 | 不規則な位相の累積を補償する方法と装置 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4731583A (US06168655-20010102-C00055.png) |
| EP (1) | EP0222325A3 (US06168655-20010102-C00055.png) |
| JP (1) | JPS62161354A (US06168655-20010102-C00055.png) |
| IL (1) | IL80134A0 (US06168655-20010102-C00055.png) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4728890A (en) * | 1985-08-16 | 1988-03-01 | Picker International, Inc. | Motion artifact suppression technique of magnetic resonance imaging |
| US4937526A (en) * | 1988-11-23 | 1990-06-26 | Mayo Foundation For Medical Education And Research | Adaptive method for reducing motion and flow artifacts in NMR images |
| JP2776844B2 (ja) * | 1988-11-30 | 1998-07-16 | 株式会社日立製作所 | 磁気共鳴動体イメージング装置 |
| JPH02237542A (ja) * | 1989-03-10 | 1990-09-20 | Yokogawa Medical Syst Ltd | Ｍｒｉシーケンスの面外ごみ除去方法 |
| EP0401429A1 (en) * | 1989-06-07 | 1990-12-12 | Koninklijke Philips Electronics N.V. | Magnetic resonance method and device for acquiring short echotime images |
| EP0401908B1 (en) * | 1989-06-07 | 1996-05-15 | Koninklijke Philips Electronics N.V. | Magnetic resonance method and device for acquiring short echo time images |
| US4959611A (en) * | 1989-06-29 | 1990-09-25 | Picker International, Inc. | Out-of-slice artifact reduction technique for magnetic resonance imagers |
| US4973906A (en) * | 1989-08-17 | 1990-11-27 | General Electric Company | Flow compensated NMR fast pulse sequence |
| US5093620A (en) * | 1990-08-09 | 1992-03-03 | General Electric | Encoding for nmr phase contrast flow measurement |
| US5280244A (en) * | 1992-03-19 | 1994-01-18 | General Electric Company | Gradient moment nulling in a fast spin echo NMR pulse sequence |
| US5729140A (en) * | 1996-10-04 | 1998-03-17 | Mayo Foundation For Medical Education And Research | Suppression of artifacts in NMR images by correlation of two NEX acquistions |
| US5926022A (en) * | 1997-04-09 | 1999-07-20 | Mayo Foundation For Medical Education And Research | Method for flow compensating a multi-shot echo-planar MRI pulse sequence |
| US6184682B1 (en) | 1998-04-15 | 2001-02-06 | Mayo Foundation For Medical Education And Research | Correction of MR images for motion artifacts using navigator echoes and autocorrection |
| US6281681B1 (en) | 1999-01-28 | 2001-08-28 | General Electric Company | Magnetic resonance imaging with interleaved Fibonacci spiral scanning |
| US6647134B1 (en) * | 2000-03-30 | 2003-11-11 | Mayo Foundation For Medical Education And Research | Autocorrection of MR projection images |
| US7558612B2 (en) * | 2002-04-16 | 2009-07-07 | The Board Of Trustees Of The Leland Stanford Junior University | Motion compensated spiral FISP MRI |
| US7457655B2 (en) * | 2004-10-08 | 2008-11-25 | Mayo Foundation For Medical Education And Research | Motion correction of magnetic resonance images using moments of spatial projections |
| US10098563B2 (en) * | 2006-11-22 | 2018-10-16 | Toshiba Medical Systems Corporation | Magnetic resonance imaging apparatus |
| US7671587B2 (en) * | 2007-05-04 | 2010-03-02 | California Institute Of Technology | Low field SQUID MRI devices, components and methods |
| WO2009023303A2 (en) * | 2007-05-04 | 2009-02-19 | California Institute Of Technology | Geometries for superconducting sensing coils for squid-based systems |
| WO2011034004A1 (ja) * | 2009-09-17 | 2011-03-24 | 株式会社 日立メディコ | 磁気共鳴イメージング装置及び傾斜磁場印加方法 |
| EP3589197A4 (en) * | 2017-03-01 | 2020-12-09 | The Regents of The University of California | IMPROVED WEIGHTED DIFFUSION IMAGING SYSTEM AND METHOD |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6038644A (ja) * | 1983-08-12 | 1985-02-28 | Hitachi Ltd | 核磁気共鳴を用いた検査装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4431968A (en) * | 1982-04-05 | 1984-02-14 | General Electric Company | Method of three-dimensional NMR imaging using selective excitation |
| US4616180A (en) * | 1983-11-14 | 1986-10-07 | Technicare Corporation | Nuclear magnetic resonance imaging with reduced sensitivity to motional effects |
| US4595879A (en) * | 1983-11-14 | 1986-06-17 | Technicare Corporation | Nuclear magnetic resonance flow imaging |
| US4629988A (en) * | 1984-07-02 | 1986-12-16 | General Electric Company | Method of imaging by depth-resolved surface coil spectroscopy |
| EP0216657B1 (fr) * | 1985-08-13 | 1990-08-01 | General Electric Cgr S.A. | Procédé de modulation de l'effet de la vitesse des parties mobiles d'un corps dans une mesure de densité par résonance magnétique nucléaire |
| US4663591A (en) * | 1985-08-16 | 1987-05-05 | General Electric Company | Method for reducing image artifacts due to periodic signal variations in NMR imaging |
-
1985
- 1985-11-15 US US06/798,544 patent/US4731583A/en not_active Expired - Lifetime
-
1986
- 1986-09-24 IL IL80134A patent/IL80134A0/xx not_active IP Right Cessation
- 1986-11-06 EP EP86115389A patent/EP0222325A3/en not_active Withdrawn
- 1986-11-14 JP JP61270030A patent/JPS62161354A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6038644A (ja) * | 1983-08-12 | 1985-02-28 | Hitachi Ltd | 核磁気共鳴を用いた検査装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0222325A2 (en) | 1987-05-20 |
| EP0222325A3 (en) | 1989-06-07 |
| IL80134A0 (en) | 1986-12-31 |
| JPS62161354A (ja) | 1987-07-17 |
| US4731583A (en) | 1988-03-15 |
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