CN1606100B - 磁性材料、无源垫片和磁共振成像系统 - Google Patents

磁性材料、无源垫片和磁共振成像系统 Download PDF

Info

Publication number
CN1606100B
CN1606100B CN200410085232.8A CN200410085232A CN1606100B CN 1606100 B CN1606100 B CN 1606100B CN 200410085232 A CN200410085232 A CN 200410085232A CN 1606100 B CN1606100 B CN 1606100B
Authority
CN
China
Prior art keywords
temperature
magnetization
spacer
ferrimagnetic
ferromagnetic
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 - Fee Related
Application number
CN200410085232.8A
Other languages
English (en)
Chinese (zh)
Other versions
CN1606100A (zh
Inventor
I·S·雅各布斯
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
Publication of CN1606100A publication Critical patent/CN1606100A/zh
Application granted granted Critical
Publication of CN1606100B publication Critical patent/CN1606100B/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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
    • G01R33/387—Compensation of inhomogeneities
    • G01R33/3873—Compensation of inhomogeneities using ferromagnetic bodies ; Passive shimming
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
    • H01F1/0558—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together bonded together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0266—Moulding; Pressing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Hard Magnetic Materials (AREA)
CN200410085232.8A 2003-10-10 2004-10-10 磁性材料、无源垫片和磁共振成像系统 Expired - Fee Related CN1606100B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/682,114 2003-10-10
US10/682,114 US6906606B2 (en) 2003-10-10 2003-10-10 Magnetic materials, passive shims and magnetic resonance imaging systems
US10/682114 2003-10-10

Publications (2)

Publication Number Publication Date
CN1606100A CN1606100A (zh) 2005-04-13
CN1606100B true CN1606100B (zh) 2013-04-17

Family

ID=34314136

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200410085232.8A Expired - Fee Related CN1606100B (zh) 2003-10-10 2004-10-10 磁性材料、无源垫片和磁共振成像系统

Country Status (5)

Country Link
US (1) US6906606B2 (https=)
EP (1) EP1523016B1 (https=)
JP (1) JP4726458B2 (https=)
CN (1) CN1606100B (https=)
DE (1) DE602004021462D1 (https=)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4767688B2 (ja) * 2003-10-15 2011-09-07 株式会社日立メディコ 磁気共鳴イメージング装置
US7224167B2 (en) * 2004-11-30 2007-05-29 General Electric Company Magnetic field generating apparatus and method for magnetic resonance imaging
CN101278457B (zh) * 2005-09-29 2012-06-06 Abb研究有限公司 用于交流传输网络中能流控制的电感调节器和控制该网络的方法
WO2007048243A1 (en) * 2005-10-28 2007-05-03 University Of Victoria Innovation And Development Corporation Shimmed active magnetic regenerator for use in thermodynamic devices
JP5203682B2 (ja) * 2007-02-13 2013-06-05 株式会社東芝 Ｍｒｉ装置、ｎｍｒ分析装置および静磁場発生部
US7753165B2 (en) * 2007-12-21 2010-07-13 Robert Bosch Gmbh Device and method for active noise cancellation in exhaust gas channel of a combustion engine
GB0803358D0 (en) * 2008-02-25 2008-04-02 Siemens Magnet Technology Ltd Method and apparatus for shimming a magnet
JP5170540B2 (ja) * 2008-04-24 2013-03-27 株式会社日立メディコ 磁気共鳴イメージング装置
JP5349177B2 (ja) * 2009-07-09 2013-11-20 株式会社東芝 磁気共鳴イメージング装置
CA3090069C (en) 2009-07-15 2024-05-07 Viewray Technologies, Inc. Method and apparatus for shielding a linear accelerator and a magnetic resonance imaging device from each other
TWI403682B (zh) * 2009-09-17 2013-08-01 Delta Electronics Inc 磁製冷結構
CN102870174B (zh) * 2010-03-30 2015-05-20 日本超导体技术公司 超导磁体装置
JP5443276B2 (ja) * 2010-06-10 2014-03-19 ジャパンスーパーコンダクタテクノロジー株式会社 超電導磁石装置
DE102010013890A1 (de) * 2010-04-07 2011-10-13 Siemens Aktiengesellschaft Verfahren und Shim-Massen-Positionsbestimmungsgerät zur Ermittlung einer Shim-Massen-Anordnung
US8604793B2 (en) 2010-10-21 2013-12-10 General Electric Company Superconducting magnet having cold iron shimming capability
CN103713269A (zh) * 2012-09-29 2014-04-09 西门子(深圳)磁共振有限公司 用于磁体的匀场片、匀场条以及磁体和磁共振系统
CN108452443B (zh) 2012-10-26 2021-05-18 优瑞技术公司 利用对放射疗法的生理反应的成像对治疗评估的系统
GB2511048B (en) 2013-02-20 2016-05-25 Siemens Healthcare Ltd Methods and apparatus for compensating for drift in magnetic field strength in superconducting magnets
US9446263B2 (en) 2013-03-15 2016-09-20 Viewray Technologies, Inc. Systems and methods for linear accelerator radiotherapy with magnetic resonance imaging
CN109310879A (zh) 2016-03-02 2019-02-05 优瑞技术公司 利用磁共振成像的粒子疗法
MX2018011524A (es) 2016-03-22 2019-07-04 Hyperfine Res Inc Métodos y aparato para adaptar campos magnéticos.
DE102017217700A1 (de) * 2017-10-05 2019-04-11 Robert Bosch Gmbh Magnetanordnung sowie Kernspinresonanz-Vorrichtung
EP3710112B1 (en) 2017-12-06 2025-08-27 Viewray Systems, Inc. Optimization of multimodal radiotherapy
EP3553547A1 (en) 2018-04-12 2019-10-16 Koninklijke Philips N.V. Shim irons for a magnetic resonance apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932055A2 (en) * 1998-01-21 1999-07-28 Oxford Instruments Limited NMR sensor

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1724405A (en) 1925-10-03 1929-08-13 Westinghouse Electric & Mfg Co Compensating device
US2213085A (en) 1936-05-21 1940-08-27 Gen Electric Temperature-compensated electrical device
US2968548A (en) 1958-01-13 1961-01-17 Int Nickel Co Temperature compensating iron-nickelcopper alloys
US3421889A (en) * 1966-01-13 1969-01-14 Us Air Force Magnetic rare earth-cobalt alloys
CH525547A (de) * 1970-12-21 1972-07-15 Bbc Brown Boveri & Cie Verfahren zur Herstellung von Feinpartikel-Dauermagneten
US4456898A (en) 1982-02-11 1984-06-26 General Electric Company Thermal compensators for magnetic circuits
JPH03181104A (ja) * 1989-12-11 1991-08-07 Kanetsukusu:Kk プラスチックボンデット磁石
US5061897A (en) * 1990-03-23 1991-10-29 Fonar Corporation Eddy current control in magnetic resonance imaging
US5478411A (en) * 1990-12-21 1995-12-26 Provost, Fellows And Scholars Of The College Of The Holy And Undivided Trinity Of Queen Elizabeth Near Dublin Magnetic materials and processes for their production
US5349297A (en) 1992-03-27 1994-09-20 Picker International Inc. Combined self shielded gradient coil and shimset
US5677854A (en) 1995-01-17 1997-10-14 General Electric Company Method for passively shimming a magnet
US5786695A (en) * 1997-03-21 1998-07-28 Picker International, Inc. Shim tray with reduced heat conduction and forced cooling
JP3737636B2 (ja) * 1998-07-23 2006-01-18 株式会社神戸製鋼所 超電導磁石装置
DE19922652C2 (de) * 1999-05-18 2001-08-02 Bruker Analytik Gmbh Einrichtung zum Homogenisieren eines Magnetfeldes
US6294972B1 (en) 2000-08-03 2001-09-25 The Mcw Research Foundation, Inc. Method for shimming a static magnetic field in a local MRI coil
US6577125B2 (en) * 2000-12-18 2003-06-10 Halliburton Energy Services, Inc. Temperature compensated magnetic field apparatus for NMR measurements

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932055A2 (en) * 1998-01-21 1999-07-28 Oxford Instruments Limited NMR sensor

Also Published As

Publication number Publication date
CN1606100A (zh) 2005-04-13
DE602004021462D1 (de) 2009-07-23
US20050077899A1 (en) 2005-04-14
EP1523016B1 (en) 2009-06-10
US6906606B2 (en) 2005-06-14
EP1523016A1 (en) 2005-04-13
JP4726458B2 (ja) 2011-07-20
JP2005118559A (ja) 2005-05-12

Similar Documents

Publication Publication Date Title
CN1606100B (zh) 磁性材料、无源垫片和磁共振成像系统
Hirosawa et al. Magnetization and magnetic anisotropy of R2Fe14B measured on single crystals
Strnat The hard-magnetic properties of rare earth-transition metal alloys
Herbst et al. Neodymium-iron-boron permanent magnets
Herbst R 2 Fe 14 B materials: Intrinsic properties and technological aspects
De Lacheisserie et al. Magnetism: II-Materials and Applications
JP2751109B2 (ja) 熱安定性の良好な焼結型永久磁石
US7847555B2 (en) MRI apparatus with high-resistance magnet
US20040263303A1 (en) Magnetic-field-generating apparatus and magnetic field orientation apparatus using it
JP2005118559A5 (https=)
KR101287719B1 (ko) Ｒ-ｔ-ｂ-ｃ형 희토류 소결 자석 및 그의 제조 방법
CN107123497A (zh) 高温度稳定性永磁材料及其应用
Demas et al. Compact magnets for magnetic resonance
Tomše et al. Nanostructured multicomponent Nd-Fe-B magnets prepared by a spark-plasma-sintering approach
Lewis et al. Ferromagnetic grain boundary signature in die-upset Re-Fe-B magnets
Pinkerton et al. A strong pinning model for the coercivity of die‐upset Pr‐Fe‐B magnets
JPH02101146A (ja) 熱処理性がすぐれたＮｄ−Ｆｅ−Ｂ系焼結磁石
Fliegans Coercivity of NdFeB-based sintered permanent magnets: experimental and numerical approaches
Machida et al. Magnetic domain structures and magnetic properties of lightly Nd-doped Sm–Co magnets with high squareness and high heat resistance
Pourarian et al. Structure and magnetic properties of RCo/sub 9/Si/sub 2/systems
Fiepke Permanent magnet materials
Vijayaraghavan et al. Hyperfine field studies in magnetically ordered samarium and terbium alloys
JPH0320045B2 (https=)
Ono et al. Investigation of high saturation magnetization of low rare-earth content α-Fe/Nd 2 Fe 14 B bulk exchange-spring magnets
Strnat A REVIEW OF RARE-EARTH PERMANENT MAGNETS, APPLICATIONS AND PROSPECTS

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130417

Termination date: 20171010