IL109844A - Apparatus for and a method of acoustic and magnetic screening - Google Patents

Apparatus for and a method of acoustic and magnetic screening

Info

Publication number
IL109844A
IL109844A IL10984494A IL10984494A IL109844A IL 109844 A IL109844 A IL 109844A IL 10984494 A IL10984494 A IL 10984494A IL 10984494 A IL10984494 A IL 10984494A IL 109844 A IL109844 A IL 109844A
Authority
IL
Israel
Prior art keywords
coil
coils
arrangement
current
acoustic
Prior art date
Application number
IL10984494A
Other languages
English (en)
Other versions
IL109844A0 (en
Original Assignee
British Tech Group
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 British Tech Group filed Critical British Tech Group
Publication of IL109844A0 publication Critical patent/IL109844A0/xx
Publication of IL109844A publication Critical patent/IL109844A/en

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
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field
    • 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
    • G01R33/3854—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils means for active and/or passive vibration damping or acoustical noise suppression in gradient magnet coil systems
    • 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
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field
    • G01R33/4215—Screening of main or gradient magnetic field of the gradient magnetic field, e.g. using passive or active shielding of the gradient magnetic field

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
IL10984494A 1993-06-02 1994-06-01 Apparatus for and a method of acoustic and magnetic screening IL109844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB939311321A GB9311321D0 (en) 1993-06-02 1993-06-02 Apparatus for and methods of acoustic and magnetic screening

Publications (2)

Publication Number Publication Date
IL109844A0 IL109844A0 (en) 1994-10-07
IL109844A true IL109844A (en) 1996-12-05

Family

ID=10736467

Family Applications (1)

Application Number Title Priority Date Filing Date
IL10984494A IL109844A (en) 1993-06-02 1994-06-01 Apparatus for and a method of acoustic and magnetic screening

Country Status (9)

Country Link
US (1) US5764059A (de)
EP (1) EP0701700B1 (de)
JP (1) JP3748883B2 (de)
CN (1) CN1127041A (de)
DE (1) DE69428991T2 (de)
FI (1) FI114415B (de)
GB (2) GB9311321D0 (de)
IL (1) IL109844A (de)
WO (1) WO1994028430A1 (de)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545996A (en) * 1994-03-15 1996-08-13 Picker International, Inc. Gradient coil with cancelled net thrust force
US5581185A (en) * 1994-03-15 1996-12-03 Picker International, Inc. Torque-balanced gradient coils for magnetic resonance imaging
GB9506829D0 (en) * 1995-04-01 1995-05-24 Mansfield Peter Active acoustic screening for quiet gradient coils in mri
US5561371A (en) * 1995-09-27 1996-10-01 General Electric Company Transverse gradient coil
DE19612478C1 (de) * 1996-03-29 1997-09-04 Siemens Ag Gradientenspulensystem für ein diagnostisches Magnetresonanzgerät
US5942898A (en) * 1996-12-13 1999-08-24 Picker International, Inc. Thrust balanced bi-planar gradient set for MRI scanners
WO1999028757A1 (en) * 1997-11-28 1999-06-10 Koninklijke Philips Electronics N.V. Magnetic resonance apparatus provided with force-optimized gradient coils
DE19910018C1 (de) * 1999-03-08 2000-10-19 Siemens Ag Verfahren zum Betrieb eines Magnetresonanztomographiegeräts
US6462547B1 (en) * 1999-03-08 2002-10-08 Siemens Aktiengesellschaft Magnetic resonance tomography apparatus having a gradient coil system with a structural design wherein a scalar product of a natural oscillation mode and Lorentz forces is minimized toward zero
GB9923648D0 (en) * 1999-10-07 1999-12-08 Magnex Scient Limited Acoustic liner
GB2355799B (en) * 1999-10-26 2004-02-04 Oxford Magnet Tech Magnet with improved access
US6556012B2 (en) * 2000-01-21 2003-04-29 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
US6954068B1 (en) 2000-01-21 2005-10-11 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
US6567685B2 (en) * 2000-01-21 2003-05-20 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
GB0006356D0 (en) * 2000-03-17 2000-05-03 Mansfield Peter Active acoustic control in gradient coil design for MRI
DE10116623C1 (de) * 2001-04-03 2002-12-05 Bruker Biospin Gmbh Magnetresonanzapparatur mit Dämpfung innerer mechanischer Schwingungen
DE10120284C1 (de) * 2001-04-25 2003-01-02 Siemens Ag Gradientenspulensystem und Magnetresonanzgerät mit dem Gradientenspulensystem
US6765381B2 (en) * 2001-08-10 2004-07-20 Varian, Inc. Extended maxwell pair gradient coils
US20030069710A1 (en) * 2001-09-24 2003-04-10 Earl Geddes Method for quantifying the polar response of transducers
DE10147474C1 (de) 2001-09-26 2003-04-24 Siemens Ag Makro-Multilayer-Spule und Verfahren zur Herstellung der Makro-Multilayer-Spule
EP1440327B1 (de) * 2001-11-01 2010-12-15 Peter Mansfield Gradientenspulen für die bildgebende magnetische resonanz mit reduzierter nervenstimulation
DE10200861A1 (de) * 2002-01-11 2003-07-31 Siemens Ag Magnetresonanzgerät mit einem Wirbelstromerzeuger
GB0223684D0 (en) * 2002-10-10 2002-11-20 Tesla Engineering Ltd Gradient coil structure for magnetic resonace imaging
CN100434929C (zh) * 2002-11-15 2008-11-19 皇家飞利浦电子股份有限公司 具有使用平衡部件的梯度磁体系统的磁共振成像系统
DE10310356A1 (de) * 2003-03-10 2004-10-07 Siemens Ag Magnetresonanzgerät mit einem Grundfeldmagneten und wenigstens einer Gradientenspulen
US7068033B2 (en) * 2003-08-18 2006-06-27 Ge Medical Systems Global Technology Company, Llc Acoustically damped gradient coil
CN1886671A (zh) * 2003-11-25 2006-12-27 皇家飞利浦电子股份有限公司 包括附加涡流屏蔽系统的有源屏蔽梯度线圈系统
US20050127913A1 (en) * 2003-12-12 2005-06-16 Seth Berger Lc coil
FR2892523B1 (fr) * 2005-10-26 2008-02-22 Commissariat Energie Atomique Machine de rmn a compensation des courants de foucault.
US7579838B2 (en) * 2005-11-18 2009-08-25 General Electric Company Systems, methods and apparatus for a partially elongated field of view in a magnetic resonance imaging system
DE102007016314B3 (de) * 2007-04-04 2009-01-02 Siemens Ag Lokalspulenanordnung zum Aufsetzen auf eine Patientenliege und Patientenliege zur Aufnahme einer Lokalspulenanordnung sowie Magnetresonanzgerät mit einer Patientenliege
WO2011122929A1 (en) * 2010-03-30 2011-10-06 Sang Boon Lam Device and method of improving electricity
EP2388610A1 (de) 2010-05-20 2011-11-23 Koninklijke Philips Electronics N.V. Magnetresonanzbildgebungsgradientenspule, Magnetanordnung und System
JP2012115456A (ja) * 2010-11-30 2012-06-21 Toshiba Corp 磁気共鳴イメージング装置
US8766635B2 (en) * 2011-06-30 2014-07-01 General Electric Company System and apparatus for balancing radial forces in a gradient coil
BR112014008363A2 (pt) * 2011-11-07 2017-04-18 Landmark Graphics Corp método e sistema de geração de imagem sísmica
US10527694B2 (en) 2015-11-12 2020-01-07 General Electric Company Magnetic resonance imaging system and an associated method thereof
CN106291421B (zh) * 2016-09-23 2023-06-30 山东大学 适用于台阶法施工中核磁共振超前地质预报的发射线圈
GB2594686B (en) * 2020-02-28 2023-11-29 Tesla Dynamic Coils BV MRI apparatus
CN112700942A (zh) * 2020-12-16 2021-04-23 苏州大学 电磁场平台及具有其的控制系统
JP7693382B2 (ja) * 2021-04-30 2025-06-17 テスラ ダイナミック コイルズ ベーフェー Ｍｒｉ装置
JP2024098334A (ja) * 2023-01-10 2024-07-23 キヤノンメディカルシステムズ株式会社 静磁場磁石及び磁気共鳴イメージング装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680545A (en) * 1985-01-04 1987-07-14 General Electric Company Method for reduction of acoustical noise generated by magnetic field gradient pulses
NL8701947A (nl) * 1987-08-19 1989-03-16 Philips Nv Magnetisch resonantie apparaat met geluidsarme gradientspoel.
JPH01303140A (ja) * 1988-06-01 1989-12-07 Hitachi Ltd 核磁気共鳴診断装置
US5084676A (en) * 1988-12-23 1992-01-28 Hitachi, Ltd. Nuclear magnetic resonance apparatus
JPH0334404A (ja) * 1989-06-30 1991-02-14 Mitsubishi Electric Corp 極低温冷凍装置
DE4029477C2 (de) * 1989-09-29 1994-06-01 Siemens Ag Tesserale Gradientenspule für Kernspin-Tomographiegeräte
US5481191A (en) * 1990-06-29 1996-01-02 Advanced Nmr Systems, Inc. Shielded gradient coil for nuclear magnetic resonance imaging
US5243286A (en) * 1990-06-06 1993-09-07 Advanced Nmr Systems, Inc. Split shield for magnetic resonance imaging
JPH0479936A (ja) * 1990-07-23 1992-03-13 Shimadzu Corp 傾斜磁場発生装置
US5235283A (en) * 1991-02-07 1993-08-10 Siemens Aktiengesellschaft Gradient coil system for a nuclear magnetic resonance tomography apparatus which reduces acoustic noise
DE4141514C2 (de) * 1991-02-07 1997-04-10 Siemens Ag Gradientenspulensystem für ein Kernspin-Tomographiegerät
JP3161008B2 (ja) * 1992-03-18 2001-04-25 株式会社日立製作所 磁気共鳴イメージング装置
US5554929A (en) * 1993-03-12 1996-09-10 Doty Scientific, Inc. Crescent gradient coils
FR2704322B1 (fr) * 1993-04-20 1995-05-24 Gec Alsthom Electromec Système de bobines de gradient transverse pour appareil de résonance magnétique nucléaire.
EP0874389B1 (de) * 1997-04-21 2007-08-01 STMicroelectronics S.r.l. Ein Verfahren zur Herstellung von MOSFET-Transistoren mittels geneigten Implantierungen

Also Published As

Publication number Publication date
IL109844A0 (en) 1994-10-07
FI114415B (fi) 2004-10-15
US5764059A (en) 1998-06-09
DE69428991T2 (de) 2002-04-04
FI955808A0 (fi) 1995-12-01
WO1994028430A1 (en) 1994-12-08
FI955808A7 (fi) 1996-01-31
CN1127041A (zh) 1996-07-17
GB9522805D0 (en) 1996-01-10
JP3748883B2 (ja) 2006-02-22
GB2293454A (en) 1996-03-27
EP0701700A1 (de) 1996-03-20
GB9311321D0 (en) 1993-07-21
JPH08510659A (ja) 1996-11-12
DE69428991D1 (de) 2001-12-13
EP0701700B1 (de) 2001-11-07

Similar Documents

Publication Publication Date Title
EP0701700B1 (de) Akustische abschirmung
Mansfield et al. Active acoustic screening: reduction of noise in gradient coils by Lorentz force balancing
KR970004567B1 (ko) 영구자석을 사용한 원통형 핵자기 공명 바이어스 자석장치 및 그 제작방법
US6933722B2 (en) Magnetic resonance imaging device and gradient magnetic field coil used for it
EP0231879B1 (de) Selbstgeschmirmte Gradientspulen für Abbildung in kernmagnetischer Resonanz
JP3737829B2 (ja) Ｍｒｉ用静音グラジエント・コイル設計における能動的音響制御
US4820988A (en) Magnetic gradient coil set for nuclear magnetic resonace system having substantially different coil-patient spacings
JPS62143012A (ja) 磁気遮蔽
JP2002219112A5 (de)
US7141974B2 (en) Active-passive electromagnetic shielding to reduce MRI acoustic noise
JPH07508857A (ja) 磁気共鳴映像法用構造型コイル電磁石
US5414399A (en) Open access superconducting MRI magnet having an apparatus for reducing magnetic hysteresis in superconducting MRI systems
US6078177A (en) Flared gradient coil set with a finite shield current
JPH0447572B2 (de)
JP2004509721A (ja) 主磁石中に配置された円錐傾斜コイルを有する垂直磁場型ｍｒｉ装置
US6462547B1 (en) Magnetic resonance tomography apparatus having a gradient coil system with a structural design wherein a scalar product of a natural oscillation mode and Lorentz forces is minimized toward zero
Bowtell et al. Analytic approach to the design of transverse gradient coils with co‐axial return paths
US6100692A (en) Gradient coil set with a finite shield current
JPH11221201A (ja) 磁気共鳴像形成装置及び方法
JP2003265437A (ja) 磁気共鳴イメージングのための傾斜コイル
US5952829A (en) Process and device for magnetic resonance examinations
US6667619B2 (en) Magnetic resonance apparatus with damping of inner mechanical vibrations
JP2005512646A (ja) 傾斜磁場コイル配置構造
JP4202564B2 (ja) 磁気共鳴イメージング装置用磁場発生装置
JP2002017705A (ja) 磁気共鳴イメージング装置

Legal Events

Date Code Title Description
FF Patent granted
KB Patent renewed
KB Patent renewed
MM9K Patent not in force due to non-payment of renewal fees