JP6151706B2 - 超電導磁石装置および磁気共鳴イメージング装置 - Google Patents
超電導磁石装置および磁気共鳴イメージング装置 Download PDFInfo
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- 238000002595 magnetic resonance imaging Methods 0.000 title claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 29
- 230000003068 static effect Effects 0.000 claims description 12
- 238000005481 NMR spectroscopy Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000003384 imaging method Methods 0.000 description 37
- 229910052734 helium Inorganic materials 0.000 description 16
- 239000001307 helium Substances 0.000 description 16
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 16
- 239000007788 liquid Substances 0.000 description 15
- 238000010791 quenching Methods 0.000 description 12
- 230000000171 quenching effect Effects 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 238000003466 welding Methods 0.000 description 5
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- 238000009835 boiling Methods 0.000 description 1
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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
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
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- 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
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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
- G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room
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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
- G01R33/3802—Manufacture or installation of magnet assemblies; Additional hardware for transportation or installation of the magnet assembly or for providing mechanical support to components of the magnet assembly
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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
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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
- G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
- G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
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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
- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/02—Quenching; Protection arrangements during quenching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
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Description
第1の実施形態の超電導磁石装置を図1、図2を用いて説明する。図1は、第1の実施形態の開放型超電導磁石装置の断面図である。図2は、コイルボビンの断面斜視図である。
第2の実施形態の開放型超電導磁石装置について図5を用いて説明する。
第3の実施形態の開放型超電導磁石装置について、図6を用いて説明する。
第4の実施形態として、支持部材5をコイルボビン2に対してボルト70で固定した構造を図7に示す。
第5の実施形態として、第1〜第4の実施形態の超電導磁石装置を用いたMRI装置について図8を用いて説明する。
Claims (8)
- 静磁場を形成すべき空間を挟んで対向配置された一対の超電導磁石と、前記一対の超電導磁石を連結する連結部とを有する超電導磁石装置であって、
前記一対の超電導磁石はそれぞれ、主コイルと、前記主コイルの漏えい磁場を抑制するためのシールドコイルと、コイルボビンとを備えて構成され、
前記コイルボビンは、前記主コイルが巻回された筒状部と、前記筒状部の空間側の端部に内周部が固定された環状の端板と、前記環状の端板の外周部が前記空間側に変位するのを抑制する支持部材とを有することを特徴とする超電導磁石装置。 - 請求項1に記載の超電導磁石装置において、前記コイルボビンは、前記筒状部の空間の逆側に配置された環状の逆側端板をさらに有し、
前記支持部材は、断面がL字型の部材であり、一端が前記逆側端板に固定され、他端が前記環状の端板の外周部を支持することを特徴とする超電導磁石装置。 - 請求項2に記載の超電導磁石装置において、前記支持部材は、前記環状の端板に沿った、環状の部材であることを特徴とする超電導磁石装置。
- 請求項2に記載の超電導磁石装置において、前記支持部材は、前記環状の端板の周方向に沿って配置された複数の部材であることを特徴とする超電導磁石装置。
- 請求項4に記載の超電導磁石装置において、前記支持部材の前記複数の部材は、相互に間隔をあけて配置されていることを特徴とする超電導磁石装置。
- 請求項1に記載の超電導磁石装置において、前記筒状部の前記空間側の端部には、前記筒状部と同形状の第2の筒状部が前記環状の端板を挟んで連結され、前記第2の筒状部の前記空間側の端部には、環状の第2の端板の内周部が固定され、
前記第2の筒状部には、第2の主コイルが巻回され、
前記支持部材は、前記環状の端板を支持し、前記環状の第2の端板を支持していないことを特徴とする超電導磁石装置。 - 請求項2に記載の超電導磁石装置において、前記支持部材は、前記逆側端板にボルトで固定されていることを特徴とする超電導磁石装置。
- 超電導磁石装置と、前記超電導磁石装置の形成する静磁場空間に被検体を挿入するベッドと、前記静磁場空間に傾斜磁場を印加する傾斜磁場発生部と、前記静磁場空間に高周波磁場を照射する高周波磁場発生部と、前記被検体が発生した核磁気共鳴信号を受信する受信部と、前記核磁気共鳴信号から前記被検体の画像を再構成する信号処理部とを有する磁気共鳴イメージング装置であって、
前記超電導磁石装置は、請求項1乃至7のいずれか一項に記載の超電導磁石装置であることを特徴とする磁気共鳴イメージング装置。
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PCT/JP2013/074962 WO2014050621A1 (ja) | 2012-09-27 | 2013-09-17 | 超電導磁石装置および磁気共鳴イメージング装置 |
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US9864022B2 (en) * | 2012-09-27 | 2018-01-09 | Hitachi, Ltd. | Superconducting magnet device and magnetic resonance imaging device |
JP6619417B2 (ja) * | 2015-02-27 | 2019-12-11 | 株式会社日立製作所 | 磁気共鳴イメージング装置 |
CN109243753B (zh) * | 2018-10-23 | 2021-01-12 | 上海联影医疗科技股份有限公司 | 超导磁体及其线圈的固定结构 |
JP6599079B1 (ja) * | 2019-05-20 | 2019-10-30 | 三菱電機株式会社 | 超電導コイルおよびその製造方法 |
CN110780245B (zh) * | 2019-11-29 | 2021-04-27 | 中国科学院电工研究所 | 用于平面超导磁共振系统的屏蔽梯度线圈设计方法及其梯度线圈 |
CN114724796A (zh) * | 2022-06-09 | 2022-07-08 | 山东奥新医疗科技有限公司 | 一种新型结构的磁共振超导磁体 |
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GB2309305B (en) | 1996-01-19 | 2000-05-31 | Oxford Magnet Tech | Improvements in or relating to MRI magnets |
JP2006324411A (ja) | 2005-05-18 | 2006-11-30 | Mitsubishi Electric Corp | 磁気共鳴イメージング装置の超電導電磁石調整方法 |
JP4705528B2 (ja) | 2006-01-05 | 2011-06-22 | 株式会社日立製作所 | 超伝導磁石装置および磁気共鳴イメージング装置 |
US7498814B1 (en) * | 2007-10-31 | 2009-03-03 | General Electric Company | Magnet assembly for magnetic resonance imaging system |
JP2010200794A (ja) * | 2009-02-27 | 2010-09-16 | Hitachi Ltd | 磁気共鳴イメージング装置 |
JP2010233736A (ja) * | 2009-03-30 | 2010-10-21 | Hitachi Ltd | 電磁石装置及び磁気共鳴イメージング装置 |
JP5534713B2 (ja) * | 2009-05-20 | 2014-07-02 | 三菱電機株式会社 | 超電導マグネット |
JP5276542B2 (ja) * | 2009-07-29 | 2013-08-28 | 株式会社日立製作所 | 超電導回路、超電導接続部の作製方法、超電導マグネット、及び、超電導マグネットの製造方法 |
US9864022B2 (en) * | 2012-09-27 | 2018-01-09 | Hitachi, Ltd. | Superconducting magnet device and magnetic resonance imaging device |
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