CA2214774C - Dispositif d'accord automatique et procede pour detecter des substances a l'aide de la resonance quadripolaire nucleaire et de la resonance magnetique nucleaire - Google Patents

Dispositif d'accord automatique et procede pour detecter des substances a l'aide de la resonance quadripolaire nucleaire et de la resonance magnetique nucleaire Download PDF

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Publication number
CA2214774C
CA2214774C CA002214774A CA2214774A CA2214774C CA 2214774 C CA2214774 C CA 2214774C CA 002214774 A CA002214774 A CA 002214774A CA 2214774 A CA2214774 A CA 2214774A CA 2214774 C CA2214774 C CA 2214774C
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CA
Canada
Prior art keywords
coil
nuclear
predetermined
specimen
transfer efficiency
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.)
Expired - Fee Related
Application number
CA002214774A
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English (en)
Other versions
CA2214774A1 (fr
Inventor
Erik E. Magnuson
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.)
Quantum Magnetics Inc
Original Assignee
Quantum Magnetics Inc
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 US08/400,673 external-priority patent/US5594338A/en
Application filed by Quantum Magnetics Inc filed Critical Quantum Magnetics Inc
Publication of CA2214774A1 publication Critical patent/CA2214774A1/fr
Application granted granted Critical
Publication of CA2214774C publication Critical patent/CA2214774C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3628—Tuning/matching of the transmit/receive coil
    • 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]
    • G01R33/441—Nuclear Quadrupole Resonance [NQR] Spectroscopy and Imaging
    • 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
    • G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
    • G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

Dispositif d'accord d'un système destiné à détecter une substance cible par l'utilisation de la résonance quadripolaire nucléaire ou de la résonance magnétique nucléaire (R.M.N.). Ledit dispositif accorde un bobinage haute fréquence (34) utilisé pour exciter la substance que l'on veut tester. Le dispositif d'accord (36) comporte une série de condensateurs fixes (93) commutés dans le circuit d'accord par des commutateurs pouvant être commandés (94). Une commande programmable (21) est utilisée pour commander la commutation et, par conséquent, l'accord du bobinage.
CA002214774A 1995-03-08 1996-03-05 Dispositif d'accord automatique et procede pour detecter des substances a l'aide de la resonance quadripolaire nucleaire et de la resonance magnetique nucleaire Expired - Fee Related CA2214774C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/400,673 1995-03-08
US08/400,673 US5594338A (en) 1995-03-08 1995-03-08 Automatic tuning apparatus and method for substance detection using nuclear quadrupole resonance and nuclear magnetic resonance
PCT/US1996/003075 WO1996027803A1 (fr) 1995-03-08 1996-03-05 Dispositif d'accord automatique et procede pour detecter des substances a l'aide de la resonance quadripolaire nucleaire et de la resonance magnetique nucleaire

Publications (2)

Publication Number Publication Date
CA2214774A1 CA2214774A1 (fr) 1996-09-12
CA2214774C true CA2214774C (fr) 2007-05-22

Family

ID=38156708

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002214774A Expired - Fee Related CA2214774C (fr) 1995-03-08 1996-03-05 Dispositif d'accord automatique et procede pour detecter des substances a l'aide de la resonance quadripolaire nucleaire et de la resonance magnetique nucleaire

Country Status (1)

Country Link
CA (1) CA2214774C (fr)

Also Published As

Publication number Publication date
CA2214774A1 (fr) 1996-09-12

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