CA2147556A1 - Method for Reconstruction for MRI Signals - Google Patents

Method for Reconstruction for MRI Signals

Info

Publication number
CA2147556A1
CA2147556A1 CA2147556A CA2147556A CA2147556A1 CA 2147556 A1 CA2147556 A1 CA 2147556A1 CA 2147556 A CA2147556 A CA 2147556A CA 2147556 A CA2147556 A CA 2147556A CA 2147556 A1 CA2147556 A1 CA 2147556A1
Authority
CA
Canada
Prior art keywords
reconstruction
linear
continuously varying
signal acquisition
magnetic
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
CA2147556A
Other languages
French (fr)
Other versions
CA2147556C (en
Inventor
Gordon E. Sarty
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.)
Individual
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
Application filed by Individual filed Critical Individual
Priority to CA002147556A priority Critical patent/CA2147556C/en
Publication of CA2147556A1 publication Critical patent/CA2147556A1/en
Application granted granted Critical
Publication of CA2147556C publication Critical patent/CA2147556C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • G01R33/483—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
    • 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

Landscapes

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

Abstract

A method and an apparatus are used in magnetic resonance imaging. In generating the resonance signals, the magnetic gradient fields are varied to represent a scan on a non-linear, continuously varying curve. One specific example given is a multi-leafed rose. New mathematical treatments of the resultant signal are presented, which are used to define a novel method for the reconstruction of an image from these signals based on k-plane coordinates naturally associated with the signal acquisition. The superior image quality that the new reconstruction method gives means that non-linear, continuously varying acquisition in k-space may be used so that magnetic field switching and high cost hardware is not required, while signal acquisition times are significantly reduced.
CA002147556A 1995-04-21 1995-04-21 Method for reconstruction for mri signals Expired - Fee Related CA2147556C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002147556A CA2147556C (en) 1995-04-21 1995-04-21 Method for reconstruction for mri signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002147556A CA2147556C (en) 1995-04-21 1995-04-21 Method for reconstruction for mri signals

Publications (2)

Publication Number Publication Date
CA2147556A1 true CA2147556A1 (en) 1996-10-22
CA2147556C CA2147556C (en) 2000-06-20

Family

ID=4155700

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002147556A Expired - Fee Related CA2147556C (en) 1995-04-21 1995-04-21 Method for reconstruction for mri signals

Country Status (1)

Country Link
CA (1) CA2147556C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7840049B2 (en) 2005-04-18 2010-11-23 Siemens Aktiengesellschaft MR image reconstruction method and MR apparatus using propeller imaging

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7840049B2 (en) 2005-04-18 2010-11-23 Siemens Aktiengesellschaft MR image reconstruction method and MR apparatus using propeller imaging

Also Published As

Publication number Publication date
CA2147556C (en) 2000-06-20

Similar Documents

Publication Publication Date Title
US5502385A (en) Method of forming a series of MR images, and device for carrying out the method
AU651570B2 (en) Triarylmethyl radicals and the use of inert carbon free radicals in MRI
AU4248893A (en) Magnetic resonance imaging using pattern recognition
DE3570526D1 (en) Arrangement for the spatially resolved inspection of a sample by means of magnetic resonance of spin moments
CA2263560A1 (en) Method of and apparatus for nuclear quadrupole resonance testing a sample
EP0325461A3 (en) Magnetic resonance imaging system
EP0302742A3 (en) Methods of obtaining images representing the distribution of paramagnetic molecules in solution
CN1950712A (en) Magnetic resonance imaging at several RF frequencies
US5055790A (en) Ssfp imaging technique with improved t1 contrast
JPH05500316A (en) Echo planar imaging device using 180 degree pulses
EP0145277A1 (en) Nuclear magnetic resonance signal artifact removal
WO1998028630A3 (en) Method and device for spectroscopic magnetic resonance imaging
US5245283A (en) Technique for shifting out-of-slice artifacts to the edge of the field of view
US4583044A (en) NMR imaging method
US4876508A (en) Method and apparatus for NMR imaging
KR870001208B1 (en) N.m.r.imaging
De Graaf et al. In vivo 1H-NMR procedure to determine several rat cerebral metabolite levels simultaneously, undisturbed by water and lipid signals
CA2147556A1 (en) Method for Reconstruction for MRI Signals
JPH06343621A (en) Photographing method and device for nuclear magnetic resonance
US11378634B2 (en) Magnetic resonance tomography (MRT) imaging, employing RF receive coils with temporal sensitivity profile modulation
Corti et al. Slice-selection method for topical NMR in solids
EP0727673A4 (en) Mri imaging method and its apparatus
JPS6425842A (en) Examination method using nuclear magnetic resonance
EP0840898A4 (en) Method and apparatus for broadband decoupling in nuclear magnetic resonance with chirp pulses
US5623206A (en) Nuclear magnetic resonance (NMR) imaging

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed