CA2214774A1 - Automatic tuning apparatus and method for substance detection using nuclear quadrupole resonance and nuclear magnetic resonance - Google Patents

Automatic tuning apparatus and method for substance detection using nuclear quadrupole resonance and nuclear magnetic resonance

Info

Publication number
CA2214774A1
CA2214774A1 CA002214774A CA2214774A CA2214774A1 CA 2214774 A1 CA2214774 A1 CA 2214774A1 CA 002214774 A CA002214774 A CA 002214774A CA 2214774 A CA2214774 A CA 2214774A CA 2214774 A1 CA2214774 A1 CA 2214774A1
Authority
CA
Canada
Prior art keywords
nuclear
resonance
magnetic resonance
tuning
nuclear 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
CA002214774A
Other languages
French (fr)
Other versions
CA2214774C (en
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.
Erik E. Magnuson
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., Erik E. Magnuson filed Critical Quantum Magnetics, Inc.
Publication of CA2214774A1 publication Critical patent/CA2214774A1/en
Application granted granted Critical
Publication of CA2214774C publication Critical patent/CA2214774C/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
    • G01R33/28—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

Abstract

Apparatus for tuning a system for detecting a target substance through the use of nuclear quadrupole resonance (NQR) or nuclear magnetic resonance (NMR). The apparatus tunes an RF coil (34) which is employed to excite the substance under test. The tuning apparatus (36) includes a series of fixed value capacitors (93) switched in the tuning circuit by controllable switches (94). A programmable controller (21) is employed to control the switching and thereby the tuning of the coil.
CA002214774A 1995-03-08 1996-03-05 Automatic tuning apparatus and method for substance detection using nuclear quadrupole resonance and nuclear magnetic resonance Expired - Fee Related CA2214774C (en)

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 (en) 1995-03-08 1996-03-05 Automatic tuning apparatus and method for substance detection using nuclear quadrupole resonance and nuclear magnetic resonance

Publications (2)

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

Family

ID=38156708

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002214774A Expired - Fee Related CA2214774C (en) 1995-03-08 1996-03-05 Automatic tuning apparatus and method for substance detection using nuclear quadrupole resonance and nuclear magnetic resonance

Country Status (1)

Country Link
CA (1) CA2214774C (en)

Also Published As

Publication number Publication date
CA2214774C (en) 2007-05-22

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130305