CA1218411A - Optimal field inhomogeneity correction coil operation for nmr magnets - Google Patents

Optimal field inhomogeneity correction coil operation for nmr magnets

Info

Publication number
CA1218411A
CA1218411A CA000484617A CA484617A CA1218411A CA 1218411 A CA1218411 A CA 1218411A CA 000484617 A CA000484617 A CA 000484617A CA 484617 A CA484617 A CA 484617A CA 1218411 A CA1218411 A CA 1218411A
Authority
CA
Canada
Prior art keywords
correction
coils
new
current
correction 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.)
Expired
Application number
CA000484617A
Other languages
English (en)
French (fr)
Inventor
Dan A. Gross
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of CA1218411A publication Critical patent/CA1218411A/en
Expired 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
    • 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
    • G01R33/387—Compensation of inhomogeneities
    • G01R33/3875—Compensation of inhomogeneities using correction coil assemblies, e.g. active shimming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/879—Magnet or electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
CA000484617A 1984-10-19 1985-06-20 Optimal field inhomogeneity correction coil operation for nmr magnets Expired CA1218411A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/662,744 US4523166A (en) 1984-10-19 1984-10-19 Optimal field inhomogeneity correction coil operation for NMR magnets
US662,744 1996-06-10

Publications (1)

Publication Number Publication Date
CA1218411A true CA1218411A (en) 1987-02-24

Family

ID=24659020

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000484617A Expired CA1218411A (en) 1984-10-19 1985-06-20 Optimal field inhomogeneity correction coil operation for nmr magnets

Country Status (6)

Country Link
US (1) US4523166A (enExample)
EP (1) EP0179370B1 (enExample)
JP (1) JPS6198247A (enExample)
CA (1) CA1218411A (enExample)
DE (1) DE3581166D1 (enExample)
IL (1) IL75479A0 (enExample)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4585992A (en) * 1984-02-03 1986-04-29 Philips Medical Systems, Inc. NMR imaging methods
IL72388A (en) * 1984-07-12 1988-07-31 Elscint Ltd Nmr imaging systems
US4680551A (en) * 1985-10-07 1987-07-14 General Electric Company Method for homogenizing a static magnetic field over an arbitrary volume
JPS62264606A (ja) * 1986-05-07 1987-11-17 Toshiba Corp 磁場補正用コイル装置
FR2598808B1 (fr) * 1986-05-13 1993-09-17 Thomson Cgr Procede de reglage des correcteurs d'homogeneite du champ magnetique cree par un aimant
GB8619012D0 (en) * 1986-08-04 1986-09-17 Picker Int Ltd Electromagnet arrangements
JPS63109849A (ja) * 1986-10-29 1988-05-14 株式会社日立メディコ Ｎｍｒイメ−ジング装置
US4761614A (en) * 1987-04-27 1988-08-02 Phospho-Energetics, Inc. Device and method for automatic shimming of NMR instrument
US4724412A (en) * 1987-08-03 1988-02-09 General Electric Company Method of determining coil arrangement of an actively shielded magnetic resonance magnet
JPH03501090A (ja) * 1987-11-05 1991-03-14 ユニバーシティー　オブ　クイーンスランド Ｎｍｒ分光器の磁界均質化方法
JPH01136645A (ja) * 1987-11-25 1989-05-29 Toshiba Corp 磁気共鳴イメージング装置
US4987371A (en) * 1989-11-27 1991-01-22 General Electric Company Method for in-vivo shimming
US5006804A (en) * 1989-12-04 1991-04-09 General Electric Company Method of optimizing shim coil current selection in magnetic resonance magnets
DE4210217C2 (de) * 1992-03-28 1994-03-24 Bruker Analytische Messtechnik Verfahren zum Bau einer optimierten Magnetspulenanordnung
US5343151A (en) * 1993-03-11 1994-08-30 Bruker Instruments, Inc. Method for automatically shimming a high resolution NMR magnet
DE4333440C1 (de) * 1993-09-30 1995-04-06 Siemens Ag Verfahren zur Shimmung eines Magnetfeldes in einem Untersuchungsraum eines Kernspinresonanzgerätes
US5410287A (en) * 1994-04-05 1995-04-25 General Electric Company Open MRI magnet with uniform magnetic field
US5428292A (en) * 1994-04-29 1995-06-27 General Electric Company Pancake MRI magnet with modified imaging volume
US5448214A (en) * 1994-06-15 1995-09-05 General Electric Company Open MRI magnet with superconductive shielding
US5677630A (en) * 1996-10-21 1997-10-14 General Electric Company Planar superconducting MRI magnet
US6064208A (en) * 1998-04-02 2000-05-16 Picker International, Inc. Two-peak alignment method of field shimming
JP4395556B2 (ja) * 2004-11-22 2010-01-13 独立行政法人 宇宙航空研究開発機構 磁力支持装置の制御定数自動調整方法
EP3379254B1 (en) 2017-03-20 2021-08-18 F. Hoffmann-La Roche AG Secondary solid waste container for solid waste of an analyzer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419904A (en) * 1966-05-05 1968-12-31 Varian Associates Superconductive solenoid having winding segments additionally energized for gradient control
US3577067A (en) * 1966-05-11 1971-05-04 Varian Associates Persistent mode superconductive orthogonal gradient cancelling coils
GB2027208B (en) * 1978-08-05 1982-12-15 Emi Ltd Magnetic field correction in nmr apparatus
US4284950A (en) * 1978-08-05 1981-08-18 E M I Limited Imaging systems
DE2840178A1 (de) * 1978-09-15 1980-03-27 Philips Patentverwaltung Magnetspulenanordnung zur erzeugung von linearen magnetischen gradientenfeldern
JPS60189905A (ja) * 1984-03-09 1985-09-27 Mitsubishi Electric Corp 高均一磁界発生装置

Also Published As

Publication number Publication date
DE3581166D1 (de) 1991-02-07
EP0179370B1 (en) 1990-12-27
EP0179370A2 (en) 1986-04-30
IL75479A0 (en) 1985-10-31
JPS6198247A (ja) 1986-05-16
JPH0349256B2 (enExample) 1991-07-29
US4523166A (en) 1985-06-11
EP0179370A3 (en) 1987-10-14

Similar Documents

Publication Publication Date Title
CA1218411A (en) Optimal field inhomogeneity correction coil operation for nmr magnets
Swain et al. An efficient technique for magnetic analysis of non-circular, high-beta tokamak equilibria
US5006804A (en) Method of optimizing shim coil current selection in magnetic resonance magnets
CN102210587B (zh) 用于确定磁共振系统控制序列的方法和装置
US4651096A (en) Imaging method for nuclear magnetic resonance utilizing balanced gradient fields
US7592812B2 (en) Magnetic resonance imaging apparatus and static magnetic field correction method
IL96422A (en) Method for optimizing positioning flashing position in magnetic magnetic resonance
EP2478384A1 (en) Concurrent optimization of rf power and rf field uniformity in mri
US5373239A (en) Shimming method
EP0560396A2 (en) Nuclear magnetic resonance imaging with improved image quality and operation efficiency
US5760585A (en) Method for actively and passively shimming a magnet
WO2015005109A1 (ja) 磁場調整支援装置、磁場調整支援方法、ｍｒｉ装置および磁石装置
JPH07299049A (ja) 中空円筒形磁石に受動的にシムを設けるための方法
US4766380A (en) Method and arrangement for determining a nuclear magnetization distribution in a part of a body
US5323135A (en) Method for the construction of an optimized magnet coil
US20110260814A1 (en) Continuously wound solenoid coil with final correction for generating a homogeneous magnetic field in the interior of the coil and associated optimization method
CN117347924A (zh) 基于信号相位的磁共振射频增益校准方法及其系统
US20070035302A1 (en) Phase unwrapping evolution method and magnetic resonance imaging apparatus using the method
Liu et al. Spherical gradient coil for ultrafast imaging
US20020074998A1 (en) Magnetic resonance image with non-linearity correction
Yamaguchi et al. The effect of net toroidal current on the measurement of diamagnetic beta value in heliotron plasma
JPH03215246A (ja) 鉄シムによるシミング方法
Berkaev et al. Beam Measurement System of VEPP-2000 Injection Channels
Kessel et al. Plasma boundary reconstruction from reflectometer arrays
GB2406652A (en) Fourier-series based method for designing asymmetric zonal shim coils

Legal Events

Date Code Title Description
MKEX Expiry