GB2431727A - NMR detection in the inhomogeneous fringe field of a magnet - Google Patents

NMR detection in the inhomogeneous fringe field of a magnet

Info

Publication number
GB2431727A
GB2431727A GB0703965A GB0703965A GB2431727A GB 2431727 A GB2431727 A GB 2431727A GB 0703965 A GB0703965 A GB 0703965A GB 0703965 A GB0703965 A GB 0703965A GB 2431727 A GB2431727 A GB 2431727A
Authority
GB
United Kingdom
Prior art keywords
magnetic field
source
magnet
amplitude
radio frequency
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
GB0703965A
Other versions
GB2431727B (en
GB0703965D0 (en
Inventor
Jennifer Susan Gregory
Richard Malcolm Aspden
Hugh Charles Seton
Sanaa Faisal Rahmatallah
Yan Li
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 Aberdeen
Original Assignee
University of Aberdeen
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 University of Aberdeen filed Critical University of Aberdeen
Publication of GB0703965D0 publication Critical patent/GB0703965D0/en
Publication of GB2431727A publication Critical patent/GB2431727A/en
Application granted granted Critical
Publication of GB2431727B publication Critical patent/GB2431727B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G01R33/28—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
    • 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
    • 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

Abstract

A method of operating a magnetic resonance ("MR") system to derive therefrom resolveable response signals from a plurality of locations distributed along a substantially lineal region of examination or test relative to a body or object. The method comprises the steps of (a) generating a radio frequency magnetic field (H1) in a direction substantially transverse to said lineal region; and (b) utilising a magnetic source (10) to generate, externally of the source, a non-homogeneous and static magnetic field (HO); the static magnetic field (i) being directed substantially parallel to said lineal region and extending therealong, thereby running substantially orthogonal to the field H1, and (ii) decreasing in amplitude with increasing distance from the magnetic source. The decrease in amplitude of said static magnetic field is selected to be of gradient sufficiently shallow whereby resolvable response signals can be derived from each of said plurality of said locations, substantially without adjustment of said radio frequency magnetic field.
GB0703965A 2004-07-30 2007-02-28 NMR detection in the inhomogeneous fringe field of a magnet Expired - Fee Related GB2431727B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0417094A GB0417094D0 (en) 2004-07-30 2004-07-30 Magnetic resonance detection
PCT/GB2005/003009 WO2006010955A1 (en) 2004-07-30 2005-08-01 Nmr detection in the inhomogeneous fringe field of a magnet

Publications (3)

Publication Number Publication Date
GB0703965D0 GB0703965D0 (en) 2007-04-11
GB2431727A true GB2431727A (en) 2007-05-02
GB2431727B GB2431727B (en) 2008-10-22

Family

ID=32947769

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0417094A Ceased GB0417094D0 (en) 2004-07-30 2004-07-30 Magnetic resonance detection
GB0703965A Expired - Fee Related GB2431727B (en) 2004-07-30 2007-02-28 NMR detection in the inhomogeneous fringe field of a magnet

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0417094A Ceased GB0417094D0 (en) 2004-07-30 2004-07-30 Magnetic resonance detection

Country Status (2)

Country Link
GB (2) GB0417094D0 (en)
WO (1) WO2006010955A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008059474A1 (en) * 2006-11-15 2008-05-22 Doron Kwiat Magnet assembly being made from a ferromagnetic or rare-earth material
GB2445759A (en) * 2006-11-28 2008-07-23 Inst Of Food Res Magnetic resonance imaging scanner
WO2009027973A1 (en) * 2007-08-30 2009-03-05 Technion Research & Development Foundation Ltd. Ex-situ nmr spectroscopy

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298602A (en) * 1985-10-25 1987-05-08 Hitachi Ltd Cylindrical permanent magnet device
US4717876A (en) * 1986-08-13 1988-01-05 Numar NMR magnet system for well logging
EP0399789A2 (en) * 1989-05-22 1990-11-28 The Regents Of The University Of California Fringe field MRI
US5757186A (en) * 1996-02-23 1998-05-26 Western Atlas International, Inc. Nuclear magnetic resonance well logging apparatus and method adapted for measurement-while-drilling
US6489872B1 (en) * 1999-05-06 2002-12-03 New Mexico Resonance Unilateral magnet having a remote uniform field region for nuclear magnetic resonance
US20030052679A1 (en) * 1998-04-17 2003-03-20 Morris Peter Gordon Magnetic gradient field projection
WO2003087861A1 (en) * 2002-04-14 2003-10-23 Bluemich Bernhard Nmr probe used to analyze materials
WO2004008168A1 (en) * 2002-07-11 2004-01-22 Victoria Link Limited Nmr apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298602A (en) * 1985-10-25 1987-05-08 Hitachi Ltd Cylindrical permanent magnet device
US4717876A (en) * 1986-08-13 1988-01-05 Numar NMR magnet system for well logging
EP0399789A2 (en) * 1989-05-22 1990-11-28 The Regents Of The University Of California Fringe field MRI
US5757186A (en) * 1996-02-23 1998-05-26 Western Atlas International, Inc. Nuclear magnetic resonance well logging apparatus and method adapted for measurement-while-drilling
US20030052679A1 (en) * 1998-04-17 2003-03-20 Morris Peter Gordon Magnetic gradient field projection
US6489872B1 (en) * 1999-05-06 2002-12-03 New Mexico Resonance Unilateral magnet having a remote uniform field region for nuclear magnetic resonance
WO2003087861A1 (en) * 2002-04-14 2003-10-23 Bluemich Bernhard Nmr probe used to analyze materials
WO2004008168A1 (en) * 2002-07-11 2004-01-22 Victoria Link Limited Nmr apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Casanova F et al, "Two-dimensional imaging with a single-sided NMR probe", Journal of Magnetic Resonance, Academic Press, Orlando, Fl, US, vol. 163, no. 1, July 2003, pages 38 - 45, chapter I and section 3.1, figure 2 *
Rahmatallah S et al, "NMR detection and one-dimensional imaging using the inhomogeneous magnetic field of a portable single-sided magnet", Journal of Magnetic Resonance, Academic Press, Orlando, Fl, US, vol. 173, no. 1, March 2005, pages 23 - 28 *

Also Published As

Publication number Publication date
GB2431727B (en) 2008-10-22
GB0417094D0 (en) 2004-09-01
GB0703965D0 (en) 2007-04-11
WO2006010955A1 (en) 2006-02-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090801