IL86570A - Reduction of truncation caused artifacts - Google Patents

Reduction of truncation caused artifacts

Info

Publication number
IL86570A
IL86570A IL86570A IL8657088A IL86570A IL 86570 A IL86570 A IL 86570A IL 86570 A IL86570 A IL 86570A IL 8657088 A IL8657088 A IL 8657088A IL 86570 A IL86570 A IL 86570A
Authority
IL
Israel
Prior art keywords
reduction
truncation caused
caused artifacts
artifacts
truncation
Prior art date
Application number
IL86570A
Other languages
English (en)
Other versions
IL86570A0 (en
Inventor
Zur Yuval
Original Assignee
Elscint Ltd
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 Elscint Ltd filed Critical Elscint Ltd
Priority to IL86570A priority Critical patent/IL86570A/xx
Publication of IL86570A0 publication Critical patent/IL86570A0/xx
Priority to DE3917309A priority patent/DE3917309A1/de
Priority to NL8901353A priority patent/NL8901353A/nl
Priority to JP1139016A priority patent/JPH02119845A/ja
Priority to US07/359,488 priority patent/US4950991A/en
Priority to IL9805391A priority patent/IL98053A/en
Publication of IL86570A publication Critical patent/IL86570A/xx

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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/021—Detachable or loose seat cushions
    • 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
    • G01R33/56545—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by finite or discrete sampling, e.g. Gibbs ringing, truncation artefacts, phase aliasing artefacts
    • 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
    • G01R33/567—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution gated by physiological signals, i.e. synchronization of acquired MR data with periodical motion of an object of interest, e.g. monitoring or triggering system for cardiac or respiratory gating
    • G01R33/5676—Gating or triggering based on an MR signal, e.g. involving one or more navigator echoes for motion monitoring and correction

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)
IL86570A 1988-05-31 1988-05-31 Reduction of truncation caused artifacts IL86570A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IL86570A IL86570A (en) 1988-05-31 1988-05-31 Reduction of truncation caused artifacts
DE3917309A DE3917309A1 (de) 1988-05-31 1989-05-27 Verfahren und einrichtung zum reduzieren von durch verstuemmelung verursachten artefakten
NL8901353A NL8901353A (nl) 1988-05-31 1989-05-29 Vermindering van door afsluiting veroorzaakte artefacten.
JP1139016A JPH02119845A (ja) 1988-05-31 1989-05-31 切捨てによって生じるアーティファクトの減少法
US07/359,488 US4950991A (en) 1988-05-31 1989-05-31 Reduction of truncation caused artifacts
IL9805391A IL98053A (en) 1988-05-31 1991-05-03 Reduction of truncation artifacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL86570A IL86570A (en) 1988-05-31 1988-05-31 Reduction of truncation caused artifacts

Publications (2)

Publication Number Publication Date
IL86570A0 IL86570A0 (en) 1988-11-15
IL86570A true IL86570A (en) 1991-07-18

Family

ID=11058894

Family Applications (1)

Application Number Title Priority Date Filing Date
IL86570A IL86570A (en) 1988-05-31 1988-05-31 Reduction of truncation caused artifacts

Country Status (5)

Country Link
US (1) US4950991A (ja)
JP (1) JPH02119845A (ja)
DE (1) DE3917309A1 (ja)
IL (1) IL86570A (ja)
NL (1) NL8901353A (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4994746A (en) * 1989-09-05 1991-02-19 Advanced Techtronics, Inc. Method of and apparatus for nuclear magnetic resonance analysis using true logarithmic amplifier
US5001429A (en) * 1989-11-21 1991-03-19 General Electric Company Removal of truncation artifacts in NMR imaging
DE4005675C2 (de) * 1990-02-22 1995-06-29 Siemens Ag Verfahren zur Unterdrückung von Artefakten bei der Bilderzeugung mittels kernmagnetischer Resonanz
US5168227A (en) * 1991-05-01 1992-12-01 General Electric High resolution imaging using short te and tr pulse sequences with asymmetric nmr echo acquisition
US5285157A (en) * 1991-05-03 1994-02-08 Elscint Ltd. Reduction of truncation caused artifacts
JP3146534B2 (ja) * 1991-08-02 2001-03-19 株式会社日立製作所 核磁気共鳴装置
IL100530A (en) * 1991-12-26 1996-05-14 Elscint Ltd Evolving image
US5560361A (en) * 1994-01-31 1996-10-01 General Electric Company MRI system with time varying gradient during signal acquisition
GB2303453A (en) * 1995-07-17 1997-02-19 Univ California Digital MRI receiver with reduced data truncation effects
US5739691A (en) * 1995-11-28 1998-04-14 The Regents Of The University Of California Multi-frequency digital low pass filter for magnetic resonance imaging
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
JP2002085207A (ja) * 2000-09-12 2002-03-26 Toyobo Co Ltd 姿勢保持座布団
CN1327810C (zh) * 2005-03-28 2007-07-25 南方医科大学 磁共振图像重建时所产生Gibbs环状伪影的消除方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1584950A (en) * 1978-05-25 1981-02-18 Emi Ltd Imaging systems
EP0132337A3 (en) * 1983-07-21 1986-12-30 The Regents Of The University Of California Apparatus and method for reducing aliasing in sagittal or coronal nmr imaging
US4689562A (en) * 1983-10-11 1987-08-25 Elscint Ltd. NMR Imaging method and system
JPS60104272A (ja) * 1983-11-11 1985-06-08 Jeol Ltd 積算処理過程において疑似的フイルタ効果を得る方法及びそれを利用した核磁気共鳴測定方法
US4535460A (en) * 1984-02-01 1985-08-13 The United States Of America As Represented By The Secretary Of The Army Method and apparatus to filter pulsed RF signals
IL76831A0 (en) * 1985-10-25 1986-02-28 Elscint Ltd Magnet resonance system with reduced artifacts
US4728843A (en) * 1985-11-11 1988-03-01 Taga Electric Co., Ltd. Ultrasonic vibrator and drive control method thereof
US4780675A (en) * 1987-08-14 1988-10-25 Picker International, Inc. Conjugate symmetry magnetic resonance imaging

Also Published As

Publication number Publication date
DE3917309A1 (de) 1989-12-14
IL86570A0 (en) 1988-11-15
US4950991A (en) 1990-08-21
JPH02119845A (ja) 1990-05-07
NL8901353A (nl) 1989-12-18

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