WO2009037709A3 - Magnet and gradient coil configurations for self-contained mri probes - Google Patents

Magnet and gradient coil configurations for self-contained mri probes Download PDF

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Publication number
WO2009037709A3
WO2009037709A3 PCT/IL2008/001259 IL2008001259W WO2009037709A3 WO 2009037709 A3 WO2009037709 A3 WO 2009037709A3 IL 2008001259 W IL2008001259 W IL 2008001259W WO 2009037709 A3 WO2009037709 A3 WO 2009037709A3
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
self
positive
component
gradient coil
Prior art date
Application number
PCT/IL2008/001259
Other languages
French (fr)
Other versions
WO2009037709A2 (en
Inventor
Aharon Blank
Yuval Zur
Eric Tammam
Amir Harel
Original Assignee
Topspin Medical Israel Ltd
Technion Res & Dev Foundation
Aharon Blank
Yuval Zur
Eric Tammam
Amir Harel
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, Technion Res & Dev Foundation, Aharon Blank, Yuval Zur, Eric Tammam, Amir Harel filed Critical Topspin Medical Israel Ltd
Publication of WO2009037709A2 publication Critical patent/WO2009037709A2/en
Publication of WO2009037709A3 publication Critical patent/WO2009037709A3/en

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

Abstract

A magnet assembly for a self-contained MRI probe having a longitudinal axis in a z-direction, the probe adapted to image an imaging region located relative to the probe, in terms of a Cartesian x-y-z coordinate system, at least partly in a positive x direction, the magnet assembly comprising magnet portions which produce a static magnetic field in the imaging region, including at least: a) a first portion located at y < 0, with magnetization having a positive y component and a negative x component; and b) a second portion, located at y > 0, with magnetization having a positive y component and a positive x component.
PCT/IL2008/001259 2007-09-20 2008-09-21 Magnet and gradient coil configurations for self-contained mri probes WO2009037709A2 (en)

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
US60/960,212 2007-09-20
US60/960,213 2007-09-20

Publications (2)

Publication Number Publication Date
WO2009037709A2 WO2009037709A2 (en) 2009-03-26
WO2009037709A3 true WO2009037709A3 (en) 2009-06-11

Family

ID=40149595

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/IL2008/001259 WO2009037709A2 (en) 2007-09-20 2008-09-21 Magnet and gradient coil configurations for self-contained mri probes
PCT/IL2008/001261 WO2009037711A2 (en) 2007-09-20 2008-09-21 Mri image reconstruction method involving nonlinear encoding gradients or phase cycling
PCT/IL2008/001260 WO2009037710A2 (en) 2007-09-20 2008-09-21 Dual imaging endoscopic probe with a self-contained mri module and an ultrasound imaging module

Family Applications After (2)

Application Number Title Priority Date Filing Date
PCT/IL2008/001261 WO2009037711A2 (en) 2007-09-20 2008-09-21 Mri image reconstruction method involving nonlinear encoding gradients or phase cycling
PCT/IL2008/001260 WO2009037710A2 (en) 2007-09-20 2008-09-21 Dual imaging endoscopic probe with a self-contained mri module and an ultrasound imaging module

Country Status (1)

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WO (3) WO2009037709A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009130002A1 (en) 2008-04-23 2009-10-29 Gsi Helmholtzzentrum Für Schwerionenforschung Gmbh Magnetic field generating means
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
US10222439B2 (en) 2014-04-24 2019-03-05 Dignity Health System and method for spiral multislab magnetic resonance imaging
JP2022537916A (en) 2019-06-25 2022-08-31 プロマクソ インコーポレイテッド System and method for image reconstruction in magnetic resonance imaging
CN115604465B (en) * 2022-12-14 2023-03-10 浙江荷湖科技有限公司 Light field microscopic image lossless compression method and device based on phase space continuity

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2002039132A1 (en) * 2000-11-06 2002-05-16 Topspin Medical (Israel) Ltd. 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
WO2005067392A2 (en) * 2004-01-20 2005-07-28 Topspin Medical (Israel) Ltd. Mri probe for prostate imaging
US20060084861A1 (en) * 2004-10-18 2006-04-20 Topspin Medical (Isreal) Ltd. Magnet and coil configurations for MRI probes
US20070114996A1 (en) * 2005-11-23 2007-05-24 Baker Hughes Incorporated Apparatus and method for measuring cased hole fluid flow with NMR

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540837B4 (en) * 1995-10-30 2004-09-23 Siemens Ag Distortion correction method for gradient nonlinearities in magnetic resonance imaging devices
CN100504434C (en) * 2003-01-21 2009-06-24 皇家飞利浦电子股份有限公司 Magnetic resonance imaging method with non-linear magnetic field gradients
US8105233B2 (en) * 2007-10-24 2012-01-31 Tarek Ahmed Nabil Abou El Kheir Endoscopic system and method for therapeutic applications and obtaining 3-dimensional human vision simulated imaging with real dynamic convergence

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2002039132A1 (en) * 2000-11-06 2002-05-16 Topspin Medical (Israel) Ltd. 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
WO2005067392A2 (en) * 2004-01-20 2005-07-28 Topspin Medical (Israel) Ltd. Mri probe for prostate imaging
US20060084861A1 (en) * 2004-10-18 2006-04-20 Topspin Medical (Isreal) Ltd. Magnet and coil configurations for MRI probes
US20070114996A1 (en) * 2005-11-23 2007-05-24 Baker Hughes Incorporated Apparatus and method for measuring cased hole fluid flow with NMR

Also Published As

Publication number Publication date
WO2009037710A3 (en) 2009-05-22
WO2009037710A2 (en) 2009-03-26
WO2009037711A2 (en) 2009-03-26
WO2009037711A3 (en) 2009-08-13
WO2009037709A2 (en) 2009-03-26

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