ATE127235T1 - Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten frequenz- /phasenverschiebungen infolge unerwünschte magnetfeldänderungen während des messverfahrens zur bestimmung der magnetischen kernresonanz- daten. - Google Patents

Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten frequenz- /phasenverschiebungen infolge unerwünschte magnetfeldänderungen während des messverfahrens zur bestimmung der magnetischen kernresonanz- daten.

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Publication number
ATE127235T1
ATE127235T1 AT89300168T AT89300168T ATE127235T1 AT E127235 T1 ATE127235 T1 AT E127235T1 AT 89300168 T AT89300168 T AT 89300168T AT 89300168 T AT89300168 T AT 89300168T AT E127235 T1 ATE127235 T1 AT E127235T1
Authority
AT
Austria
Prior art keywords
magnetic
nmr
magnetic field
compensation
data
Prior art date
Application number
AT89300168T
Other languages
English (en)
Inventor
Ching Yao
James D Hale
Lawrence E Crooks
Leon Kaufman
Original Assignee
Univ California
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 Univ California filed Critical Univ California
Application granted granted Critical
Publication of ATE127235T1 publication Critical patent/ATE127235T1/de

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    • 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
    • G01R33/56563—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of the main magnetic field B0, e.g. temporal variation of the magnitude or spatial inhomogeneity of B0
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General 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)
  • Magnetic Resonance Imaging Apparatus (AREA)
AT89300168T 1988-04-14 1989-01-10 Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten frequenz- /phasenverschiebungen infolge unerwünschte magnetfeldänderungen während des messverfahrens zur bestimmung der magnetischen kernresonanz- daten. ATE127235T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/181,440 US4885542A (en) 1988-04-14 1988-04-14 MRI compensated for spurious NMR frequency/phase shifts caused by spurious changes in magnetic fields during NMR data measurement processes

Publications (1)

Publication Number Publication Date
ATE127235T1 true ATE127235T1 (de) 1995-09-15

Family

ID=22664291

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89300168T ATE127235T1 (de) 1988-04-14 1989-01-10 Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten frequenz- /phasenverschiebungen infolge unerwünschte magnetfeldänderungen während des messverfahrens zur bestimmung der magnetischen kernresonanz- daten.

Country Status (5)

Country Link
US (1) US4885542A (de)
EP (1) EP0337588B1 (de)
JP (1) JPH0213434A (de)
AT (1) ATE127235T1 (de)
DE (1) DE68923988D1 (de)

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Also Published As

Publication number Publication date
EP0337588A2 (de) 1989-10-18
US4885542A (en) 1989-12-05
JPH0213434A (ja) 1990-01-17
EP0337588A3 (en) 1990-12-12
DE68923988D1 (de) 1995-10-05
EP0337588B1 (de) 1995-08-30

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