JPS56107151A - Electric current shim adjustment for nuclear magnetic resonance device - Google Patents

Electric current shim adjustment for nuclear magnetic resonance device

Info

Publication number
JPS56107151A
JPS56107151A JP1074080A JP1074080A JPS56107151A JP S56107151 A JPS56107151 A JP S56107151A JP 1074080 A JP1074080 A JP 1074080A JP 1074080 A JP1074080 A JP 1074080A JP S56107151 A JPS56107151 A JP S56107151A
Authority
JP
Japan
Prior art keywords
point
resolution
electric current
computer
coil
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
JP1074080A
Other languages
Japanese (ja)
Other versions
JPS6243131B2 (en
Inventor
Kazuo Momona
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.)
Jeol Ltd
Original Assignee
Jeol Ltd
Nihon Denshi KK
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 Jeol Ltd, Nihon Denshi KK filed Critical Jeol Ltd
Priority to JP1074080A priority Critical patent/JPS56107151A/en
Publication of JPS56107151A publication Critical patent/JPS56107151A/en
Publication of JPS6243131B2 publication Critical patent/JPS6243131B2/ja
Granted 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
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/389—Field stabilisation, e.g. by field measurements and control means or indirectly by current stabilisation

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

PURPOSE:To adjust a shim current to an optimal value without unlocking of NMR lock by shifting a point of measurement toward each point on a straight line running through the lowest resolution point and a center point of gravity of pattern formed by point ''n'' excepting the said lowest resolution point while a resolution is monitored. CONSTITUTION:A detection signal generated on a reception coil for locking inside NMR probe 2 is detected by detection circuits 6, 7. An electric current on an excitation coil 9 of magnetic poles 1, 1' is controlled by means of ''u'' mode NMR signal obtained from the circuit 6 and ''v'' mode NMR signal (signal V corresponding to a resolution) obtained from the detection circuit 7 is transmitted to a computer 12. This computer 12 indicates an electric current value to be supplied to a shim coil 3; e.g. I1, I2 are supplied to the shim coil 3. The computer 12 selects optional three points P1-P3 on a plane I1-I2, sequentially running an electric current to the shim coil, reading out signals V1-V3 from the circuit 7 and comparing their magnitude. Then the computer discards the lowest point, searching for a new trial point and forming three points including the new trial point. Through repetition of this process, the point formation is focused at an apex V0, seeking the optimal point P0(I10, I20) so that a resolution may be maximized.
JP1074080A 1980-01-31 1980-01-31 Electric current shim adjustment for nuclear magnetic resonance device Granted JPS56107151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1074080A JPS56107151A (en) 1980-01-31 1980-01-31 Electric current shim adjustment for nuclear magnetic resonance device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1074080A JPS56107151A (en) 1980-01-31 1980-01-31 Electric current shim adjustment for nuclear magnetic resonance device

Publications (2)

Publication Number Publication Date
JPS56107151A true JPS56107151A (en) 1981-08-25
JPS6243131B2 JPS6243131B2 (en) 1987-09-11

Family

ID=11758687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1074080A Granted JPS56107151A (en) 1980-01-31 1980-01-31 Electric current shim adjustment for nuclear magnetic resonance device

Country Status (1)

Country Link
JP (1) JPS56107151A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61210408A (en) * 1985-03-15 1986-09-18 Agency Of Ind Science & Technol Constant current power source using high stable electromagnet
US8704521B2 (en) 2004-04-01 2014-04-22 Liposcience, Inc. NMR analyzers for clinical evaluation of biosamples

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002257915A (en) * 2001-02-27 2002-09-11 National Institute Of Advanced Industrial & Technology Magnetic field uniformity coefficient adjusting method and adjusting device, and program

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61210408A (en) * 1985-03-15 1986-09-18 Agency Of Ind Science & Technol Constant current power source using high stable electromagnet
US8704521B2 (en) 2004-04-01 2014-04-22 Liposcience, Inc. NMR analyzers for clinical evaluation of biosamples
US10365339B2 (en) 2004-04-01 2019-07-30 Liposcience, Inc. NMR analyzers for clinical evaluation of biosamples

Also Published As

Publication number Publication date
JPS6243131B2 (en) 1987-09-11

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