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WO2008153036A1 - オープン型磁気共鳴イメージング装置 - Google Patents

オープン型磁気共鳴イメージング装置 Download PDF

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Publication number
WO2008153036A1
WO2008153036A1 PCT/JP2008/060643 JP2008060643W WO2008153036A1 WO 2008153036 A1 WO2008153036 A1 WO 2008153036A1 JP 2008060643 W JP2008060643 W JP 2008060643W WO 2008153036 A1 WO2008153036 A1 WO 2008153036A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic field
frequency
shield
imaging device
magnetic resonance
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.)
Ceased
Application number
PCT/JP2008/060643
Other languages
English (en)
French (fr)
Inventor
Munetaka Tsuda
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.)
Hitachi Healthcare Manufacturing Ltd
Original Assignee
Hitachi Medical Corp
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 Hitachi Medical Corp filed Critical Hitachi Medical Corp
Priority to US12/602,528 priority Critical patent/US8212564B2/en
Priority to JP2009519266A priority patent/JP5427604B2/ja
Publication of WO2008153036A1 publication Critical patent/WO2008153036A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • G01R33/3806—Open magnet assemblies for improved access to the sample, e.g. C-type or U-type magnets
    • 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
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • 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
    • G01R33/422—Screening of the radio frequency field
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Epidemiology (AREA)
  • Electromagnetism (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
  • Medical Informatics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Radiology & Medical Imaging (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

　オープン構造のMRI装置において、傾斜磁場コイルと高周波コイルとの間に配置される高周波シールドの磁場遮蔽能力を維持しながら、渦電流に起因する振動を低減することにある。 　高周波シールドは、互いに異なる位置で複数に分割された2枚の導体シート501，503と、その間に挟まれた誘電体シート502とを含む。これにより、高周波シールドは、高周波磁場に対する電気的抵抗率が、傾斜磁場のスイッチング周波数に対する電気的抵抗率よりも低くなる。これにより、高周波磁場に対しては一様な導体として作用することができ、高周波磁場の遮蔽能力を発揮できるとともに、傾斜磁場の通過により生じる渦電流を低減でき、振動を抑制できる。
PCT/JP2008/060643 2007-06-14 2008-06-11 オープン型磁気共鳴イメージング装置 Ceased WO2008153036A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/602,528 US8212564B2 (en) 2007-06-14 2008-06-11 Open magnetic resonance imaging apparatus
JP2009519266A JP5427604B2 (ja) 2007-06-14 2008-06-11 オープン型磁気共鳴イメージング装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007157309 2007-06-14
JP2007-157309 2007-06-14

Publications (1)

Publication Number Publication Date
WO2008153036A1 true WO2008153036A1 (ja) 2008-12-18

Family

ID=40129641

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/060643 Ceased WO2008153036A1 (ja) 2007-06-14 2008-06-11 オープン型磁気共鳴イメージング装置

Country Status (3)

Country Link
US (1) US8212564B2 (ja)
JP (1) JP5427604B2 (ja)
WO (1) WO2008153036A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4950363B1 (ja) * 2011-03-22 2012-06-13 三菱電機株式会社 超電導マグネット
CN103654787A (zh) * 2012-09-24 2014-03-26 三星电子株式会社 磁共振成像装置及其制造方法
JPWO2016114198A1 (ja) * 2015-01-13 2017-09-28 株式会社日立製作所 磁気共鳴イメージング装置

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7994787B2 (en) * 2006-07-12 2011-08-09 Hitachi Medical Corporation Superconducting magnet, magnetic resonance imaging apparatus, and method of calculating coolability of cryo-cooler
US9389291B2 (en) * 2009-11-27 2016-07-12 Hitachi Medical Corporation Gradient coil, magnetic resonance imaging device, and method for designing coil pattern
CN102412048A (zh) * 2011-11-16 2012-04-11 宁波鑫高益磁材有限公司 一种开放式超导mri磁体系统
DE102011089445B4 (de) * 2011-12-21 2015-11-05 Siemens Aktiengesellschaft Verfahren und Gradientensystem zur Reduzierung von mechanischen Schwingungen in einem Magnetresonanzbildgebungssystem
DE102013226226A1 (de) * 2012-12-21 2014-06-26 Robert Bosch Gmbh Induktivladespulenvorrichtung
DE102013206555B4 (de) * 2013-04-12 2018-03-01 Siemens Healthcare Gmbh Magnetresonanzscanner mit Antennensystem
KR102145001B1 (ko) * 2014-01-03 2020-08-14 삼성전자주식회사 알에프 코일 구조물
EP4553527A3 (en) * 2014-09-05 2025-08-13 Hyperfine, Inc. Ferromagnetic augmentation for magnetic resonance imaging
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
US10527694B2 (en) * 2015-11-12 2020-01-07 General Electric Company Magnetic resonance imaging system and an associated method thereof
WO2020097821A1 (en) * 2018-11-14 2020-05-22 Shanghai United Imaging Healthcare Co., Ltd. Radiation therapy system and method
CN111913144B (zh) * 2020-06-01 2023-06-23 上海联影医疗科技股份有限公司 用于磁共振系统的壳体结构、电子部件和磁共振系统

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02143509A (ja) * 1988-10-03 1990-06-01 Philips Gloeilampenfab:Nv 磁気共鳴装置の磁石の検査空間における騒音低減装置
JPH10192254A (ja) * 1996-08-16 1998-07-28 General Electric Co <Ge> Ｒｆ磁場から勾配コイルを遮蔽する装置
JP2001198104A (ja) * 2000-01-24 2001-07-24 Toshiba Corp Ｍｒｉ装置のコイル構造
JP2002200055A (ja) * 2000-12-28 2002-07-16 Toshiba Medical System Co Ltd 磁気共鳴イメージング装置
JP2003144409A (ja) * 2001-11-08 2003-05-20 Ge Medical Systems Global Technology Co Llc 磁気共鳴撮像装置
JP2004019585A (ja) * 2002-06-18 2004-01-22 Hitachi Ltd スクロール圧縮機
JP2005065752A (ja) * 2003-08-28 2005-03-17 Shin Etsu Chem Co Ltd Ｍｒｉ用磁場発生装置
JP2005185318A (ja) * 2003-12-24 2005-07-14 Mitsubishi Electric Corp 磁石装置及び磁気共鳴イメ−ジング装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6567685B2 (en) 2000-01-21 2003-05-20 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
US6954068B1 (en) * 2000-01-21 2005-10-11 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
DE10007679C2 (de) * 2000-02-19 2002-06-20 Bruker Ag Faellanden Frequenzgenerator für NMR-Anwendungen mit direkter digitaler Frequenzsynthese (DDS), Verfahren zum Betrieb eines solchen DDS-Generators sowie Verfahren zum Betrieb eines NMR-Spektrometers mit DDS-Generator
US6522144B2 (en) * 2000-12-22 2003-02-18 Ge Medical Systems Global Technology Company, Llc RF shielding method and apparatus for an open MRI system
US6943548B1 (en) * 2001-06-22 2005-09-13 Fonar Corporation Adaptive dynamic range receiver for MRI
JP2004016585A (ja) 2002-06-18 2004-01-22 Ge Medical Systems Global Technology Co Llc 磁気共鳴撮影装置、磁気回路装置、および周波数特性調整方法
DE10345767B4 (de) * 2003-10-01 2006-05-18 Siemens Ag Magnetresonanzgerät mit einer Höhlung und mit einem in der Höhlung angeordneten Gradientenspulensystem
DE102004003535B3 (de) * 2004-01-23 2005-10-13 Siemens Ag Erzeuger eines zeitvariablen Magnetfelds eines Magnetresonanzgeräts und Magnetresonanzgerät mit einem derartigen Erzeuger eines zeitvariablen Magnetfelds
JP4879829B2 (ja) * 2007-07-19 2012-02-22 株式会社日立製作所 高周波コイル及び磁気共鳴撮像装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02143509A (ja) * 1988-10-03 1990-06-01 Philips Gloeilampenfab:Nv 磁気共鳴装置の磁石の検査空間における騒音低減装置
JPH10192254A (ja) * 1996-08-16 1998-07-28 General Electric Co <Ge> Ｒｆ磁場から勾配コイルを遮蔽する装置
JP2001198104A (ja) * 2000-01-24 2001-07-24 Toshiba Corp Ｍｒｉ装置のコイル構造
JP2002200055A (ja) * 2000-12-28 2002-07-16 Toshiba Medical System Co Ltd 磁気共鳴イメージング装置
JP2003144409A (ja) * 2001-11-08 2003-05-20 Ge Medical Systems Global Technology Co Llc 磁気共鳴撮像装置
JP2004019585A (ja) * 2002-06-18 2004-01-22 Hitachi Ltd スクロール圧縮機
JP2005065752A (ja) * 2003-08-28 2005-03-17 Shin Etsu Chem Co Ltd Ｍｒｉ用磁場発生装置
JP2005185318A (ja) * 2003-12-24 2005-07-14 Mitsubishi Electric Corp 磁石装置及び磁気共鳴イメ−ジング装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4950363B1 (ja) * 2011-03-22 2012-06-13 三菱電機株式会社 超電導マグネット
US8989827B2 (en) 2011-03-22 2015-03-24 Mitsubishi Electric Corporation Superconducting magnet
CN103654787A (zh) * 2012-09-24 2014-03-26 三星电子株式会社 磁共振成像装置及其制造方法
JPWO2016114198A1 (ja) * 2015-01-13 2017-09-28 株式会社日立製作所 磁気共鳴イメージング装置

Also Published As

Publication number Publication date
JPWO2008153036A1 (ja) 2010-08-26
US20100176811A1 (en) 2010-07-15
JP5427604B2 (ja) 2014-02-26
US8212564B2 (en) 2012-07-03

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