FI904518A0 - Hastighetssoekningskrets foer gradientstroemmen vid ett hoeghastighets-nmr-avbildningssystem. - Google Patents

Hastighetssoekningskrets foer gradientstroemmen vid ett hoeghastighets-nmr-avbildningssystem.

Info

Publication number
FI904518A0
FI904518A0 FI904518A FI904518A FI904518A0 FI 904518 A0 FI904518 A0 FI 904518A0 FI 904518 A FI904518 A FI 904518A FI 904518 A FI904518 A FI 904518A FI 904518 A0 FI904518 A0 FI 904518A0
Authority
FI
Finland
Prior art keywords
hoeghastighets
hastighetssoekningskrets
gradientstroemmen
avbildningssystem
foer
Prior art date
Application number
FI904518A
Other languages
English (en)
Finnish (fi)
Inventor
Otward Maria Mueller
Peter Bernard Roemer
William Aland Edelstein
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Publication of FI904518A0 publication Critical patent/FI904518A0/fi

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
    • G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
    • G01R33/3852—Gradient amplifiers; means for controlling the application of a gradient magnetic field to the sample, e.g. a gradient signal synthesizer

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
FI904518A 1989-09-14 1990-09-13 Hastighetssoekningskrets foer gradientstroemmen vid ett hoeghastighets-nmr-avbildningssystem. FI904518A0 (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/407,180 US5017871A (en) 1989-09-14 1989-09-14 Gradient current speed-up circuit for high-speed NMR imaging system

Publications (1)

Publication Number Publication Date
FI904518A0 true FI904518A0 (fi) 1990-09-13

Family

ID=23610967

Family Applications (1)

Application Number Title Priority Date Filing Date
FI904518A FI904518A0 (fi) 1989-09-14 1990-09-13 Hastighetssoekningskrets foer gradientstroemmen vid ett hoeghastighets-nmr-avbildningssystem.

Country Status (5)

Country Link
US (1) US5017871A (fr)
EP (1) EP0418074A3 (fr)
JP (1) JPH0651033B2 (fr)
FI (1) FI904518A0 (fr)
IL (1) IL95462A0 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5406205A (en) * 1989-11-08 1995-04-11 Bruker Analytische Messtechnik Gmbh Gradient-generation system, nuclear spin tomograph, and process for the generation of images with a nuclear-spin tomograph
US5105153A (en) * 1990-06-04 1992-04-14 General Electric Company Gradient speed-up circuit for nmr system
US5063349A (en) * 1990-06-04 1991-11-05 General Electric Company Transformer-coupled gradient speed-up circuit
JPH05509009A (ja) * 1990-06-13 1993-12-16 アドバンスト　エヌエムアール　システムズ，インク． 磁気共鳴イメージングシステムの磁界発生コイルの駆動回路
DE4127529C2 (de) * 1991-08-20 1995-06-08 Siemens Ag Verfahren zum Betrieb eines Kernspintomographiegeräts mit einem Resonanzkreis zur Erzeugung von Gradientenfeldern
US5270657A (en) * 1992-03-23 1993-12-14 General Electric Company Split gradient amplifier for an MRI system
US5451878A (en) * 1994-07-15 1995-09-19 General Electric Company Non-resonant gradient field accelerator
US5721490A (en) * 1995-02-09 1998-02-24 Hitachi Medical Corporation Power source apparatus including a plurality of output current amplifiers connected in parallel and MRI apparatus using the same
GB9705459D0 (en) * 1997-03-17 1997-05-07 British Tech Group A gradient drive system for magnetic resonance imaging
US6552448B1 (en) 1999-09-08 2003-04-22 Harman International Industries, Incorporated Energy management system for series connected amplifiers
US6504426B2 (en) * 2001-03-28 2003-01-07 Guy Picha Methods and systems for power amplifying of signals
US6920312B1 (en) 2001-05-31 2005-07-19 Lam Research Corporation RF generating system with fast loop control
DE10216493A1 (de) * 2002-04-13 2003-10-30 Univ Leipzig Verfahren zur Steuerung von Verstärkern mit induktiven Lasten
US6888402B2 (en) * 2003-08-26 2005-05-03 International Business Machines Corporation Low voltage current reference circuits
JP6479359B2 (ja) * 2014-07-16 2019-03-06 キヤノンメディカルシステムズ株式会社 コイル駆動装置および磁気共鳴イメージング装置
US10281540B2 (en) 2015-04-13 2019-05-07 Hyperfine Research, Inc. Magnetic coil power methods and apparatus
US11280811B2 (en) * 2019-06-17 2022-03-22 Advanced Energy Industries, Inc. High side current monitor
CN111585519B (zh) * 2020-05-26 2023-06-27 上海联影医疗科技股份有限公司 梯度功率放大器系统及其并联控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437053A (en) * 1982-05-10 1984-03-13 Diasonics (Nmr) Inc. Gradient power supply
US4628264A (en) * 1984-03-14 1986-12-09 Advanced Nmr Systems, Inc. NMR gradient field modulation
US4612596A (en) * 1985-03-18 1986-09-16 Kabushiki Kaisha Toshiba Circuit for stabilizing electromagnet coil current of a magnetic resonance imaging device
DE3614154A1 (de) * 1985-05-03 1986-11-06 British Technology Group Ltd., London Nmr-geraet mit einem schaltbaren daempfungsglied
GB8530930D0 (en) * 1985-12-16 1986-01-29 Mansfield P Inductive circuit arrangements
EP0250718A1 (fr) * 1986-06-30 1988-01-07 Siemens Aktiengesellschaft Alimentation de courant pour charge inductive, plus particulièrement pour bobine de gradient avec dispositif de commande et de régulation

Also Published As

Publication number Publication date
US5017871A (en) 1991-05-21
JPH03155833A (ja) 1991-07-03
JPH0651033B2 (ja) 1994-07-06
EP0418074A2 (fr) 1991-03-20
IL95462A0 (en) 1991-06-30
EP0418074A3 (en) 1991-07-31

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Legal Events

Date Code Title Description
FA Application withdrawn

Owner name: GENERAL ELECTRIC COMPANY