WO1997008525A3 - Method for prepulsing in mri sequence - Google Patents

Method for prepulsing in mri sequence Download PDF

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Publication number
WO1997008525A3
WO1997008525A3 PCT/US1996/013099 US9613099W WO9708525A3 WO 1997008525 A3 WO1997008525 A3 WO 1997008525A3 US 9613099 W US9613099 W US 9613099W WO 9708525 A3 WO9708525 A3 WO 9708525A3
Authority
WO
WIPO (PCT)
Prior art keywords
pulse
flip
prepulsing
mri sequence
magnetization
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.)
Ceased
Application number
PCT/US1996/013099
Other languages
French (fr)
Other versions
WO1997008525A2 (en
Inventor
W Thomas Dixon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emory University
Original Assignee
Emory University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Emory University filed Critical Emory University
Priority to AU67234/96A priority Critical patent/AU6723496A/en
Priority to EP96927403A priority patent/EP0871905A2/en
Publication of WO1997008525A2 publication Critical patent/WO1997008525A2/en
Publication of WO1997008525A3 publication Critical patent/WO1997008525A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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]
    • G01R33/446—Multifrequency selective RF pulses, e.g. multinuclear acquisition mode
    • 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
    • G01R33/56518—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to eddy currents, e.g. caused by switching of the gradient magnetic field

Landscapes

  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

A composite spin lock prepulse method compensates for magnetic field inhomogeneities in objects or materials under study using nuclear magnetic resonance (NMR). When a flip pulse 90y (10) is complete, a second x flip pulse (20) is generated. After application of the second pulse (20), and x locking pulse (30) is applied. Optional flip back pulses (40, 50) can be used to return the magnetization to the position in which it was at t=0.
PCT/US1996/013099 1995-08-18 1996-08-12 Method for prepulsing in mri sequence Ceased WO1997008525A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU67234/96A AU6723496A (en) 1995-08-18 1996-08-12 Methods for prepulsing in nuclear magnetic resonance pulse sequencing
EP96927403A EP0871905A2 (en) 1995-08-18 1996-08-12 Methods for prepulsing in nuclear magnetic resonance pulse sequencing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/515,679 US5614826A (en) 1995-08-18 1995-08-18 Methods for prepulsing in nuclear magnetic resonance pulse sequencing
US08/515,679 1995-08-18

Publications (2)

Publication Number Publication Date
WO1997008525A2 WO1997008525A2 (en) 1997-03-06
WO1997008525A3 true WO1997008525A3 (en) 1997-04-17

Family

ID=24052307

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/013099 Ceased WO1997008525A2 (en) 1995-08-18 1996-08-12 Method for prepulsing in mri sequence

Country Status (4)

Country Link
US (1) US5614826A (en)
EP (1) EP0871905A2 (en)
AU (1) AU6723496A (en)
WO (1) WO1997008525A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10219528A1 (en) * 2002-05-02 2003-11-13 Philips Intellectual Property Fast nuclear magnetic resonance imaging with gradient echoes
JP3995542B2 (en) * 2002-06-28 2007-10-24 東芝医用システムエンジニアリング株式会社 Magnetic resonance imaging apparatus and magnetic resonance imaging data collection method
US6952100B1 (en) * 2004-04-29 2005-10-04 Ge Medical Systems Global Technology, Inc. Phase controlled surface coil magnetic resonance imaging
US8970217B1 (en) 2010-04-14 2015-03-03 Hypres, Inc. System and method for noise reduction in magnetic resonance imaging
US8618797B2 (en) 2010-07-23 2013-12-31 General Electric Company Composite spin locking pulse sequence and method of using the same
CN107690309B (en) * 2016-11-08 2019-03-22 中国科学院深圳先进技术研究院 Magnetic resonance blood vessel wall imaging method and equipment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5262724A (en) * 1990-05-29 1993-11-16 Instrumentarium Corp. Examination method and apparatus
US5347217A (en) * 1990-08-02 1994-09-13 British Technology Group Limited Magnetic resonance spectroscopy and imaging

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02114188A (en) * 1988-10-24 1990-04-26 Jeol Ltd Broad-bank spin locking method
US5270652A (en) * 1992-05-20 1993-12-14 North American Philips Corporation MR method and apparatus employing magnetization transfer contrast inducing fat-selective RF pulse
US5281917A (en) * 1992-08-05 1994-01-25 Wisconsin Alumni Research Foundation Off-resonance spin-locking for enhanced tumor contrast in NMR imaging
US5378985A (en) * 1993-07-15 1995-01-03 General Electric Company Fast spin echo prescan for MRI system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5262724A (en) * 1990-05-29 1993-11-16 Instrumentarium Corp. Examination method and apparatus
US5347217A (en) * 1990-08-02 1994-09-13 British Technology Group Limited Magnetic resonance spectroscopy and imaging

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0871905A4 *

Also Published As

Publication number Publication date
WO1997008525A2 (en) 1997-03-06
EP0871905A2 (en) 1998-10-21
EP0871905A4 (en) 1998-10-21
AU6723496A (en) 1997-03-19
US5614826A (en) 1997-03-25

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