JPH0580125B2 - - Google Patents

Info

Publication number
JPH0580125B2
JPH0580125B2 JP2217287A JP21728790A JPH0580125B2 JP H0580125 B2 JPH0580125 B2 JP H0580125B2 JP 2217287 A JP2217287 A JP 2217287A JP 21728790 A JP21728790 A JP 21728790A JP H0580125 B2 JPH0580125 B2 JP H0580125B2
Authority
JP
Japan
Prior art keywords
magnetic field
bore
magnet
ring
axis
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 - Lifetime
Application number
JP2217287A
Other languages
English (en)
Japanese (ja)
Other versions
JPH03138912A (ja
Inventor
Jayakumaaru Raguhaban
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 JPH03138912A publication Critical patent/JPH03138912A/ja
Publication of JPH0580125B2 publication Critical patent/JPH0580125B2/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
    • G01R33/387—Compensation of inhomogeneities
    • G01R33/3873—Compensation of inhomogeneities using ferromagnetic bodies ; Passive shimming
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Electromagnets (AREA)
JP2217287A 1989-08-23 1990-08-20 高磁界強度磁石用強磁性補償リング Granted JPH03138912A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/397,238 US5001447A (en) 1989-08-23 1989-08-23 Ferromagnetic compensation rings for high field strength magnets
US397,238 1989-08-23

Publications (2)

Publication Number Publication Date
JPH03138912A JPH03138912A (ja) 1991-06-13
JPH0580125B2 true JPH0580125B2 (en:Method) 1993-11-08

Family

ID=23570384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2217287A Granted JPH03138912A (ja) 1989-08-23 1990-08-20 高磁界強度磁石用強磁性補償リング

Country Status (6)

Country Link
US (1) US5001447A (en:Method)
EP (1) EP0414528B1 (en:Method)
JP (1) JPH03138912A (en:Method)
CA (1) CA2013936A1 (en:Method)
DE (1) DE69030968T2 (en:Method)
IL (1) IL95295A (en:Method)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9001300A (nl) * 1990-06-08 1992-01-02 Koninkl Philips Electronics Nv Magneetstelsel voor magnetische resonantie.
US5345208A (en) * 1993-05-26 1994-09-06 General Electric Company Pole face design for a C-shaped superconducting magnet
US5798680A (en) * 1994-04-15 1998-08-25 New York University Strapped open magnetic structure
DE69632113T2 (de) * 1995-10-23 2005-07-28 General Electric Co. Offener, durch kryogenes Fluid gekühlter Magnet für die Bilderzeugung durch magnetische Resonanz mit gleichförmigem Magnetfeld
US5668516A (en) * 1995-12-29 1997-09-16 General Electric Company Simplified active shield superconducting magnet assembly for magnetic resonance imaging
US5594401A (en) * 1996-02-20 1997-01-14 General Electric Company Closed superconductive magnet with uniform imaging volume
JPH10155765A (ja) * 1996-08-26 1998-06-16 General Electric Co <Ge> 閉構造磁気共鳴イメージング・マグネット
US5721523A (en) * 1996-08-26 1998-02-24 General Electric Company Compact MRI superconducting magnet
US6157276A (en) * 1998-08-14 2000-12-05 General Electric Company MRI magnet assembly with non-conductive inner wall
DE10251458B4 (de) 2001-11-21 2007-12-13 Siemens Ag Kryostat
DE10251449B4 (de) 2001-11-21 2004-12-30 Siemens Ag Kryostat
DE10354677B4 (de) * 2003-11-22 2006-09-21 Bruker Biospin Gmbh Zusätzliche Streufeldabschirmung eines supraleitenden Magnetspulensystem
DE102004007291B4 (de) 2004-02-14 2006-09-21 Bruker Biospin Gmbh Hybrid-Magnetanordnung
US7417434B2 (en) * 2004-06-17 2008-08-26 Koninklijke Philips Electronics N.V. Magnetic resonance imaging system with iron-assisted magnetic field gradient system
US20060266053A1 (en) * 2005-05-25 2006-11-30 General Electric Company Apparatus for thermal shielding of a superconducting magnet
RU2544460C1 (ru) * 2014-04-15 2015-03-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") Магнитотерапевтическая установка
JP2017011236A (ja) * 2015-06-26 2017-01-12 株式会社神戸製鋼所 多層磁気シールド
CN105243941A (zh) * 2015-11-24 2016-01-13 国网重庆市电力公司电力科学研究院 一种抑制电压互感器铁磁谐振的仿真模型
GB2545735A (en) * 2015-12-24 2017-06-28 Siemens Healthcare Ltd Cryostats for superconducting magnets
GB2586493B (en) * 2019-08-21 2021-08-18 Siemens Healthcare Ltd Method and apparatus for shimming a superconducting magnet.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3245944A1 (de) * 1982-12-11 1984-06-14 Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten Elektromagnet fuer die nmr-tomographie
US4635017A (en) * 1984-10-12 1987-01-06 Siemens Aktiengesellschaft Magnetic apparatus of a system for nuclear spin tomography with a shielding device
US4646045A (en) * 1985-03-25 1987-02-24 General Electric Company Aperture sized disc shaped end caps of a ferromagnetic shield for magnetic resonance magnets
NL8502340A (nl) * 1985-08-26 1987-03-16 Philips Nv Magnetisch resonantie apparaat met veld homogeniserende magnetische elementen.
GB2184243B (en) * 1985-12-09 1989-12-20 Picker Int Ltd Electromagnet arrangements
EP0243669B1 (de) * 1986-04-21 1991-04-10 Siemens Aktiengesellschaft Rahmenstruktur für ein Magnetsystem einer Anlage zur Kernspin-Tomographie
US4698611A (en) * 1986-12-03 1987-10-06 General Electric Company Passive shimming assembly for MR magnet
US4724412A (en) * 1987-08-03 1988-02-09 General Electric Company Method of determining coil arrangement of an actively shielded magnetic resonance magnet
JPH01227407A (ja) * 1988-03-08 1989-09-11 Toshiba Corp 磁気共鳴イメージング装置用磁石
US4931759A (en) * 1989-04-06 1990-06-05 General Atomics Magnetic resonance imaging magnet having minimally symmetric ferromagnetic shield

Also Published As

Publication number Publication date
IL95295A (en) 1994-06-24
DE69030968T2 (de) 1998-01-22
JPH03138912A (ja) 1991-06-13
EP0414528A2 (en) 1991-02-27
DE69030968D1 (de) 1997-07-31
US5001447A (en) 1991-03-19
CA2013936A1 (en) 1991-02-23
EP0414528A3 (en) 1991-07-31
IL95295A0 (en) 1991-06-30
EP0414528B1 (en) 1997-06-25

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