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WO2009037711A3 - Procédés de reconstruction d'images pour des sondes irm - Google Patents

Procédés de reconstruction d'images pour des sondes irm Download PDF

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Publication number
WO2009037711A3
WO2009037711A3 PCT/IL2008/001261 IL2008001261W WO2009037711A3 WO 2009037711 A3 WO2009037711 A3 WO 2009037711A3 IL 2008001261 W IL2008001261 W IL 2008001261W WO 2009037711 A3 WO2009037711 A3 WO 2009037711A3
Authority
WO
WIPO (PCT)
Prior art keywords
image reconstruction
reconstruction method
method involving
mri image
encoding gradients
Prior art date
Application number
PCT/IL2008/001261
Other languages
English (en)
Other versions
WO2009037711A2 (fr
Inventor
Yuval Zur
Original Assignee
Topspin Medical Israel Ltd
Yuval Zur
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 Topspin Medical Israel Ltd, Yuval Zur filed Critical Topspin Medical Israel Ltd
Publication of WO2009037711A2 publication Critical patent/WO2009037711A2/fr
Publication of WO2009037711A3 publication Critical patent/WO2009037711A3/fr

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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
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/3808—Magnet assemblies for single-sided MR wherein the magnet assembly is located on one side of a subject only; Magnet assemblies for inside-out MR, e.g. for MR in a borehole or in a blood vessel, or magnet assemblies for fringe-field MR
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/42—Details of probe positioning or probe attachment to the patient
    • A61B8/4209—Details of probe positioning or probe attachment to the patient by using holders, e.g. positioning frames
    • 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
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
    • 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
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/383—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets
    • 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
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
    • 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
    • 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
    • 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
    • G01R33/54—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
    • G01R33/54—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
    • G01R33/5608—Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels
    • 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
    • G01R33/56572—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of a gradient magnetic field, e.g. non-linearity of a gradient magnetic field

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Signal Processing (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Veterinary Medicine (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

L'invention concerne un procédé pour reconstruire une image à partir d'un ensemble de points de données IRM dans un espace de phase acquis à partir d'une tranche d'imagerie, au moyen d'un codage de phase par un ou plusieurs champs de gradient, chacun étant non linéaire en fonction des positions dans un sens de codage de phase. Selon l'invention, le procédé comprend les étapes suivantes : a) multiplication d'un vecteur de points de données par une matrice de reconstruction qui est différente d'une matrice de transformée de Fourier, au moins à cause de la non linéarité d'un ou plusieurs champs de gradient; et b) obtention d'un vecteur de densités d'éléments de volume pour l'image.
PCT/IL2008/001261 2007-09-20 2008-09-21 Procédés de reconstruction d'images pour des sondes irm WO2009037711A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US96021207P 2007-09-20 2007-09-20
US96021307P 2007-09-20 2007-09-20
US60/960,213 2007-09-20
US60/960,212 2007-09-20

Publications (2)

Publication Number Publication Date
WO2009037711A2 WO2009037711A2 (fr) 2009-03-26
WO2009037711A3 true WO2009037711A3 (fr) 2009-08-13

Family

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Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/IL2008/001261 WO2009037711A2 (fr) 2007-09-20 2008-09-21 Procédés de reconstruction d'images pour des sondes irm
PCT/IL2008/001260 WO2009037710A2 (fr) 2007-09-20 2008-09-21 Sonde d'irm
PCT/IL2008/001259 WO2009037709A2 (fr) 2007-09-20 2008-09-21 Aimant de sonde irm et configurations de bobine

Family Applications After (2)

Application Number Title Priority Date Filing Date
PCT/IL2008/001260 WO2009037710A2 (fr) 2007-09-20 2008-09-21 Sonde d'irm
PCT/IL2008/001259 WO2009037709A2 (fr) 2007-09-20 2008-09-21 Aimant de sonde irm et configurations de bobine

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WO (3) WO2009037711A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2274634B1 (fr) 2008-04-23 2013-03-20 GSI Helmholtzzentrum für Schwerionenforschung GmbH Dispositif de production de champ magnétique
US9089314B2 (en) 2010-01-27 2015-07-28 Medtronic Cryocath Lp Partially compliant balloon device
US9119550B2 (en) * 2012-03-30 2015-09-01 Siemens Medical Solutions Usa, Inc. Magnetic resonance and ultrasound parametric image fusion
WO2015164109A1 (fr) * 2014-04-24 2015-10-29 Dignity Health Système et procédé d'imagerie par résonance magnétique à blocs multiples en spirale
MX2021015362A (es) 2019-06-25 2022-01-24 Promaxo Inc Sistemas y metodos para la reconstruccion de imagen en imagenologia por resonancia magnetica.
US20230366965A1 (en) * 2022-05-16 2023-11-16 c/o Advanced MRI Technologies, LLC Highly Accelerated Sub-Millimeter Resolution 3D GRASE with Controlled T2 Blurring in T2-Weighted Functional MRI at 7 Tesla
CN115604465B (zh) * 2022-12-14 2023-03-10 浙江荷湖科技有限公司 基于相空间连续性的光场显微图像无损压缩方法及装置

Citations (2)

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Publication number Priority date Publication date Assignee Title
US5886524A (en) * 1995-10-30 1999-03-23 Siemens Aktiengesellschaft Method of distortion correction for gradient non-linearities in nuclear magnetic resonance tomography apparatus
WO2004065977A1 (fr) * 2003-01-21 2004-08-05 Koninklijke Philips Electronics N.V. Procede de resonance magnetique avec gradients de champ magnetique non lineaires

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US4862128A (en) * 1989-04-27 1989-08-29 The United States Of America As Represented By The Secretary Of The Army Field adjustable transverse flux sources
US5304930A (en) * 1993-02-01 1994-04-19 Panacea Medical Laboratories Remotely positioned MRI system
US5572132A (en) * 1995-08-15 1996-11-05 Pulyer; Yuly M. MRI probe for external imaging
US6704594B1 (en) * 2000-11-06 2004-03-09 Topspin Medical (Israel) Limited Magnetic resonance imaging device
US6400149B1 (en) * 2001-05-24 2002-06-04 Schlumberger Technology Corporation Nuclear magnetic resonance apparatus and method for generating an axisymmetric magnetic field having straight contour lines in the resonance region
EP1718194A4 (fr) * 2004-01-20 2010-05-12 Topspin Medical Israel Ltd Sonde irm destinee a l'imagerie de la prostate
US20060084861A1 (en) * 2004-10-18 2006-04-20 Topspin Medical (Isreal) Ltd. Magnet and coil configurations for MRI probes
US7372263B2 (en) * 2005-11-23 2008-05-13 Baker Hughes Incorporated Apparatus and method for measuring cased hole fluid flow with NMR
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Patent Citations (2)

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US5886524A (en) * 1995-10-30 1999-03-23 Siemens Aktiengesellschaft Method of distortion correction for gradient non-linearities in nuclear magnetic resonance tomography apparatus
WO2004065977A1 (fr) * 2003-01-21 2004-08-05 Koninklijke Philips Electronics N.V. Procede de resonance magnetique avec gradients de champ magnetique non lineaires

Non-Patent Citations (6)

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Also Published As

Publication number Publication date
WO2009037709A3 (fr) 2009-06-11
WO2009037710A2 (fr) 2009-03-26
WO2009037709A2 (fr) 2009-03-26
WO2009037711A2 (fr) 2009-03-26
WO2009037710A3 (fr) 2009-05-22

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