AU2002232876A1 - Method and apparatus for spin-echo-train mr imaging using prescribed signal evolutions - Google Patents

Method and apparatus for spin-echo-train mr imaging using prescribed signal evolutions

Info

Publication number
AU2002232876A1
AU2002232876A1 AU2002232876A AU3287602A AU2002232876A1 AU 2002232876 A1 AU2002232876 A1 AU 2002232876A1 AU 2002232876 A AU2002232876 A AU 2002232876A AU 3287602 A AU3287602 A AU 3287602A AU 2002232876 A1 AU2002232876 A1 AU 2002232876A1
Authority
AU
Australia
Prior art keywords
echo
spin
train
imaging
prescribed signal
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.)
Abandoned
Application number
AU2002232876A
Inventor
James R. Brookeman
John P. Mugler Iii
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.)
University of Virginia Patent Foundation
Original Assignee
University of Virginia UVA
University of Virginia Patent Foundation
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22975229&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU2002232876(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by University of Virginia UVA, University of Virginia Patent Foundation filed Critical University of Virginia UVA
Publication of AU2002232876A1 publication Critical patent/AU2002232876A1/en
Abandoned 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]
    • G01R33/48—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
    • G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
    • G01R33/5615—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE]
    • 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
    • G01R33/50—NMR imaging systems based on the determination of relaxation times, e.g. T1 measurement by IR sequences; T2 measurement by multiple-echo sequences
    • 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
    • G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
    • G01R33/5615—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE]
    • G01R33/5617—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE] using RF refocusing, e.g. RARE
    • 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
    • G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
    • G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency
    • G01R33/586—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency for optimal flip angle of RF pulses

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)
AU2002232876A 2000-12-21 2001-12-21 Method and apparatus for spin-echo-train mr imaging using prescribed signal evolutions Abandoned AU2002232876A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US25718200P 2000-12-21 2000-12-21
US60257182 2000-12-21
PCT/US2001/050551 WO2002050574A1 (en) 2000-12-21 2001-12-21 Method and apparatus for spin-echo-train mr imaging using prescribed signal evolutions

Publications (1)

Publication Number Publication Date
AU2002232876A1 true AU2002232876A1 (en) 2002-07-01

Family

ID=22975229

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002232876A Abandoned AU2002232876A1 (en) 2000-12-21 2001-12-21 Method and apparatus for spin-echo-train mr imaging using prescribed signal evolutions

Country Status (3)

Country Link
US (4) USRE48347E1 (en)
AU (1) AU2002232876A1 (en)
WO (1) WO2002050574A1 (en)

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Also Published As

Publication number Publication date
USRE48347E1 (en) 2020-12-08
USRE47178E1 (en) 2018-12-25
US20040051527A1 (en) 2004-03-18
USRE44644E1 (en) 2013-12-17
WO2002050574A1 (en) 2002-06-27
US7164268B2 (en) 2007-01-16

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