CA2089764A1 - Analyzing heart wall motion using spatial modulation of magnetization - Google Patents

Analyzing heart wall motion using spatial modulation of magnetization

Info

Publication number
CA2089764A1
CA2089764A1 CA002089764A CA2089764A CA2089764A1 CA 2089764 A1 CA2089764 A1 CA 2089764A1 CA 002089764 A CA002089764 A CA 002089764A CA 2089764 A CA2089764 A CA 2089764A CA 2089764 A1 CA2089764 A1 CA 2089764A1
Authority
CA
Canada
Prior art keywords
heart wall
stripes
imaging
motion
magnetization
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.)
Granted
Application number
CA002089764A
Other languages
French (fr)
Other versions
CA2089764C (en
Inventor
Leon Axel
Meir Shinnar
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 Pennsylvania Penn
Original Assignee
Individual
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
Priority claimed from US07/685,915 external-priority patent/US5217016A/en
Application filed by Individual filed Critical Individual
Publication of CA2089764A1 publication Critical patent/CA2089764A1/en
Application granted granted Critical
Publication of CA2089764C publication Critical patent/CA2089764C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
    • G01R33/56308—Characterization of motion or flow; Dynamic imaging
    • G01R33/56333—Involving spatial modulation of the magnetization within an imaged region, e.g. spatial modulation of magnetization [SPAMM] tagging
    • 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
    • G01R33/56509—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to motion, displacement or flow, e.g. gradient moment nulling

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Vascular Medicine (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

A technique for generating "optimal" radio frequency pulses for use in creating SPAMM imaging stripes and for quantitatively de-termining the displacements of the imaging stripes during a pre-imag-ing interval. The imaging operator selects the desired stripe parame-ters (304) so that the resulting SPAMM imaging stripe will have the desired narrowness, sharpness, flatness and the like. These parame-ters are then used by an optimal pulse generating system (212) to gen-erate the input radio frequency pulse sequence which will produce the desired stripes. Tagging of the heart wall or some other soft tissue structure with a grid of planes of altered magnetization is then used to provide finite element analysis to quantify regional heart wall motion and the like. The intersections of the tagging stripes are used as a set of fiducial marks within the heart wall, and the motion of these inter-sections through the heart cycle is used to track the motion of the un-derlying tissue.
CA002089764A 1990-08-17 1991-08-19 Analyzing heart wall motion using spatial modulation of magnetization Expired - Lifetime CA2089764C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US57020790A 1990-08-17 1990-08-17
US570,207 1990-08-17
US685,915 1991-04-15
US07/685,915 US5217016A (en) 1988-10-06 1991-04-15 Method for generating optimal pulses for magnetic resonance imaging using spatial modulation of magnetization
PCT/US1991/005869 WO1992003089A1 (en) 1990-08-17 1991-08-19 Analyzing heart wall motion using spatial modulation of magnetization

Publications (2)

Publication Number Publication Date
CA2089764A1 true CA2089764A1 (en) 1992-02-18
CA2089764C CA2089764C (en) 2001-11-20

Family

ID=27075267

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002089764A Expired - Lifetime CA2089764C (en) 1990-08-17 1991-08-19 Analyzing heart wall motion using spatial modulation of magnetization

Country Status (6)

Country Link
EP (1) EP0543928A4 (en)
JP (1) JP3179784B2 (en)
AU (1) AU8523291A (en)
CA (1) CA2089764C (en)
HU (1) HU213190B (en)
WO (1) WO1992003089A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5275163A (en) * 1991-04-02 1994-01-04 U.S. Philips Corporation Magnetic resonance imaging method and device for monitoring motion of a part of an object
EP0507391B1 (en) * 1991-04-02 1998-06-10 Koninklijke Philips Electronics N.V. Magnetic resonance imaging method and device for monitoring motion of a part of an object based on stimulated echoes.
US6453187B1 (en) * 1998-08-10 2002-09-17 The Johns Hopkins University Method of employing angle images for measuring object motion in tagged magnetic resonance imaging
FR2828753A1 (en) * 2001-08-14 2003-02-21 Koninkl Philips Electronics Nv Method for observing the deformation or motion in 3-D of an object, such as a human organ, from subsequent sets of medical image data whereby correspondences between data sets are created and linked by equations
JP2008212634A (en) * 2007-02-06 2008-09-18 Toshiba Corp Magnetic resonance imaging apparatus and image analysis method and image analysis program therefor
JP5167556B2 (en) * 2007-11-12 2013-03-21 株式会社日立メディコ Magnetic resonance imaging system
DE102014225282B4 (en) 2014-12-09 2016-07-21 Siemens Healthcare Gmbh Deformation calculation with cyclical movement of a test object

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777957A (en) * 1985-06-14 1988-10-18 General Electric Company Method for measuring and imaging fluid flow
JPS63317144A (en) * 1987-06-22 1988-12-26 Hitachi Ltd Magnetic resonance image synthesizing system
US4953554A (en) * 1988-03-04 1990-09-04 Resonex, Inc. Magnetic resonance imaging method
JP2646663B2 (en) * 1988-06-07 1997-08-27 株式会社日立製作所 Moving body imaging method and apparatus

Also Published As

Publication number Publication date
HU9300422D0 (en) 1993-05-28
EP0543928A4 (en) 1993-06-30
JP3179784B2 (en) 2001-06-25
CA2089764C (en) 2001-11-20
WO1992003089A1 (en) 1992-03-05
AU8523291A (en) 1992-03-17
HU213190B (en) 1997-03-28
HUT63547A (en) 1993-09-28
JPH06500035A (en) 1994-01-06
EP0543928A1 (en) 1993-06-02

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