JP2005109487A5 - - Google Patents

Download PDF

Info

Publication number
JP2005109487A5
JP2005109487A5 JP2004280787A JP2004280787A JP2005109487A5 JP 2005109487 A5 JP2005109487 A5 JP 2005109487A5 JP 2004280787 A JP2004280787 A JP 2004280787A JP 2004280787 A JP2004280787 A JP 2004280787A JP 2005109487 A5 JP2005109487 A5 JP 2005109487A5
Authority
JP
Japan
Prior art keywords
permanent magnet
section
stepped
magnet body
assembly
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.)
Granted
Application number
JP2004280787A
Other languages
English (en)
Japanese (ja)
Other versions
JP4758629B2 (ja
JP2005109487A (ja
Filing date
Publication date
Priority claimed from US10/672,658 external-priority patent/US7423431B2/en
Application filed filed Critical
Publication of JP2005109487A publication Critical patent/JP2005109487A/ja
Publication of JP2005109487A5 publication Critical patent/JP2005109487A5/ja
Application granted granted Critical
Publication of JP4758629B2 publication Critical patent/JP4758629B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

JP2004280787A 2003-09-29 2004-09-28 極片のないマルチリング式永久磁石並びにその製作方法 Expired - Fee Related JP4758629B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/672,658 US7423431B2 (en) 2003-09-29 2003-09-29 Multiple ring polefaceless permanent magnet and method of making
US10/672,658 2003-09-29

Publications (3)

Publication Number Publication Date
JP2005109487A JP2005109487A (ja) 2005-04-21
JP2005109487A5 true JP2005109487A5 (cg-RX-API-DMAC7.html) 2009-11-12
JP4758629B2 JP4758629B2 (ja) 2011-08-31

Family

ID=34376435

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004280787A Expired - Fee Related JP4758629B2 (ja) 2003-09-29 2004-09-28 極片のないマルチリング式永久磁石並びにその製作方法

Country Status (4)

Country Link
US (1) US7423431B2 (cg-RX-API-DMAC7.html)
JP (1) JP4758629B2 (cg-RX-API-DMAC7.html)
CN (1) CN100444290C (cg-RX-API-DMAC7.html)
IT (1) ITMI20041679A1 (cg-RX-API-DMAC7.html)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7796002B2 (en) * 2004-09-30 2010-09-14 Hitachi Metals, Ltd. Magnetic field generator for MRI
WO2007117335A2 (en) * 2006-01-04 2007-10-18 University Of Utah Research Foundation High field strength magnetic field generation system and associated methods
US7710081B2 (en) 2006-10-27 2010-05-04 Direct Drive Systems, Inc. Electromechanical energy conversion systems
CN101388271A (zh) * 2007-09-14 2009-03-18 Ge医疗系统环球技术有限公司 磁体系统和mri设备
JP2011525389A (ja) 2008-06-24 2011-09-22 アルバータ ヘルス サービシズ 磁石組立体およびイメージング・ボリューム用の磁場を決定する方法
US8421297B2 (en) * 2008-07-28 2013-04-16 Direct Drive Systems, Inc. Stator wedge for an electric machine
EP2453250B1 (en) 2009-06-30 2019-06-12 Aspect Imaging Ltd. A cage in an magnetic resonance device with a fastening/attenuating system
DE102009031665B4 (de) * 2009-07-05 2016-02-25 Msm Krystall Gbr (Vertretungsberechtigte Gesellschafter: Dr. Rainer Schneider, 12165 Berlin; Arno Mecklenburg, 10999 Berlin) Elektrodynamischer Aktor
US10224742B2 (en) 2015-01-18 2019-03-05 Powerpath Technologies Incorporated High efficiency uninterruptible power supply with near loss-less ultrafast electromechanical switching
CN109275334A (zh) * 2016-01-25 2019-01-25 Ut巴特勒有限公司 具有选择性表面改性的钕-铁-硼磁体及其制造方法
US10224135B2 (en) 2016-08-08 2019-03-05 Aspect Imaging Ltd. Device, system and method for obtaining a magnetic measurement with permanent magnets
US11287497B2 (en) 2016-08-08 2022-03-29 Aspect Imaging Ltd. Device, system and method for obtaining a magnetic measurement with permanent magnets
US11988730B2 (en) 2016-08-08 2024-05-21 Aspect Imaging Ltd. Device, system and method for obtaining a magnetic measurement with permanent magnets
US10955504B2 (en) 2016-11-22 2021-03-23 Hyperfine Research, Inc. Systems and methods for automated detection in magnetic resonance images
US10627464B2 (en) 2016-11-22 2020-04-21 Hyperfine Research, Inc. Low-field magnetic resonance imaging methods and apparatus
US10847294B2 (en) 2017-07-10 2020-11-24 Aspect Imaging Ltd. System for generating a magnetic field
BR112020021872A2 (pt) * 2018-05-21 2021-01-26 Hyperfine Research, Inc. métodos e aparelhos de magneto b0 para um sistema de ressonância magnética
JP2022510240A (ja) 2018-11-29 2022-01-26 エプシタウ リミテッド 混合相磁石リングを備える軽量の非対称磁石アレイ
KR20210096189A (ko) 2018-11-29 2021-08-04 엡시타우 엘티디. 세타 자석 고리들을 갖춘 경량 비대칭 자석 배열체들
US10690738B1 (en) 2018-11-29 2020-06-23 Epsitau Ltd. Lightweight asymmetric magnet arrays
CN119949800A (zh) * 2023-10-30 2025-05-09 西安大医集团股份有限公司 磁共振成像引导的放疗系统及磁共振成像设备

Family Cites Families (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899762A (en) * 1974-10-03 1975-08-12 Permag Magnetics Corp Permanent magnetic structure
US4496395A (en) * 1981-06-16 1985-01-29 General Motors Corporation High coercivity rare earth-iron magnets
US4540453A (en) * 1982-10-28 1985-09-10 At&T Technologies Magnetically soft ferritic Fe-Cr-Ni alloys
JPH03170643A (ja) 1983-08-04 1991-07-24 Sumitomo Special Metals Co Ltd 永久磁石用合金
US4672346A (en) * 1984-04-11 1987-06-09 Sumotomo Special Metal Co., Ltd. Magnetic field generating device for NMR-CT
US4667123A (en) * 1985-11-20 1987-05-19 The Garrett Corporation Two pole permanent magnet rotor construction for toothless stator electrical machine
US4679022A (en) * 1985-12-27 1987-07-07 Sumitomo Special Metal Co. Ltd. Magnetic field generating device for NMR-CT
US4827235A (en) * 1986-07-18 1989-05-02 Kabushiki Kaisha Toshiba Magnetic field generator useful for a magnetic resonance imaging instrument
DE3779715T2 (de) * 1986-09-27 1993-01-28 Sumitomo Spec Metals Vorrichtung zur erzeugung eines magnetfeldes fuer rechnergesteuerte tomographie mittels magnetischer kernresonanz.
US4931760A (en) * 1986-10-08 1990-06-05 Asahi Kasei Kogyo Kabushiki Kaisha Uniform magnetic field generator
JPS63241905A (ja) * 1987-03-27 1988-10-07 Sumitomo Special Metals Co Ltd 磁界発生装置
US4998976A (en) * 1987-10-07 1991-03-12 Uri Rapoport Permanent magnet arrangement
US5063934A (en) * 1987-10-07 1991-11-12 Advanced Techtronics, Inc. Permanent magnet arrangement
US5320103A (en) * 1987-10-07 1994-06-14 Advanced Techtronics, Inc. Permanent magnet arrangement
US4953555A (en) * 1987-10-20 1990-09-04 The United States Of Americas As Represented By The Secretary Of The Army Permanent magnet structure for a nuclear magnetic resonance imager for medical diagnostics
JPH02141501A (ja) 1988-11-22 1990-05-30 Tdk Corp 永久磁石用合金粉末
US5134374A (en) * 1989-06-01 1992-07-28 Applied Superconetics Magnetic field control apparatus
JPH03131234A (ja) * 1989-07-07 1991-06-04 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置
GB9009579D0 (en) 1990-04-27 1990-06-20 Oxford Advanced Tech Magnetic field generating assembly
US5252924A (en) * 1991-11-18 1993-10-12 Sumitomo Special Metals Co., Ltd. Magnetic field generating apparatus for MRI
JP2808198B2 (ja) * 1990-07-02 1998-10-08 住友特殊金属株式会社 Ｍｒｉ用磁界発生装置とその製法
FR2665297B1 (fr) 1990-07-30 1992-10-09 Centre Nat Rech Scient Aimant permanent pour installation d'imagerie par resonance magnetique nucleaire.
EP0479514B1 (en) * 1990-09-29 1998-07-01 Sumitomo Special Metals Co., Ltd. Magnetic field generating device used for MRI
JP2816256B2 (ja) * 1991-03-25 1998-10-27 株式会社日立製作所 コイル体
DE69131940T2 (de) 1991-11-15 2000-08-17 Hitachi Medical Corp., Tokio/Tokyo Apparat zur Erzeugung von Magnetfeldern für die Bildgebung mittels magnetischer Resonanz
JP2767659B2 (ja) * 1991-12-17 1998-06-18 信越化学工業株式会社 磁場発生装置
EP0556751B1 (en) * 1992-02-15 1998-06-10 Santoku Metal Industry Co., Ltd. Alloy ingot for permanent magnet, anisotropic powders for permanent magnet, method for producing same and permanent magnet
IL106779A0 (en) * 1992-09-11 1993-12-08 Magna Lab Inc Permanent magnetic structure
FR2704975B1 (fr) 1993-05-03 1995-06-23 Commissariat Energie Atomique Structure d'aimant permanent pour la production d'une induction magnétique stable et homogène dans un volume donné.
DE69419096T2 (de) * 1993-09-29 1999-10-28 Oxford Magnet Technology Ltd., Eynsham Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz
JPH0831635A (ja) * 1994-07-08 1996-02-02 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置
DE4424580C2 (de) * 1994-07-13 1996-09-05 Bruker Analytische Messtechnik NMR-Scheibenspule
JPH0945520A (ja) * 1995-07-27 1997-02-14 Hitachi Medical Corp 磁気共鳴イメージング装置に用いる超電導磁石装置およびそれを用いた磁気共鳴イメージング装置
JP3014319B2 (ja) * 1996-04-12 2000-02-28 信越化学工業株式会社 磁石対向型永久磁石回路
US5900793A (en) * 1997-07-23 1999-05-04 Odin Technologies Ltd Permanent magnet assemblies for use in medical applications
US6150911A (en) * 1996-07-24 2000-11-21 Odin Technologies Ltd. Yoked permanent magnet assemblies for use in medical applications
JPH10174681A (ja) 1996-12-17 1998-06-30 Shin Etsu Chem Co Ltd 永久磁石磁気回路
IT1294051B1 (it) * 1997-04-29 1999-03-15 Esaote Spa Struttura magnetica per la generazione di campi magnetici adatti all'uso nel rilevamento d'immagine in risonanza magnetica nucleare
US6411187B1 (en) * 1997-07-23 2002-06-25 Odin Medical Technologies, Ltd. Adjustable hybrid magnetic apparatus
US6157278A (en) * 1997-07-23 2000-12-05 Odin Technologies Ltd. Hybrid magnetic apparatus for use in medical applications
WO1999015914A1 (en) * 1997-09-25 1999-04-01 Odin Technologies Ltd. Magnetic apparatus for mri
JPH11127561A (ja) * 1997-10-22 1999-05-11 Denso Corp 磁石併用型回転電機の回転子及びその製造方法
IT1298022B1 (it) * 1997-12-05 1999-12-20 Esaote Spa Magnete permanente per il rilevamento d'immagini in risonaza magnetica nucleare.
US6163154A (en) * 1997-12-23 2000-12-19 Magnetic Diagnostics, Inc. Small scale NMR spectroscopic apparatus and method
EP0965305B1 (en) * 1997-12-26 2007-03-21 Neomax Co., Ltd. Mri magnetic field generator
US6255670B1 (en) * 1998-02-06 2001-07-03 General Electric Company Phosphors for light generation from light emitting semiconductors
JP2002502648A (ja) * 1998-02-09 2002-01-29 オーディン・メディカル・テクノロジーズ・リミテッド Ｍｒｉ又はｍｒｔプローブで使用するための開いた磁石及び開いた磁気装置を設計するための方法
IT1305960B1 (it) * 1998-05-11 2001-05-21 Esaote Spa Struttura di magnete in particolare per macchine per il rilevamentod'immagine in risonanza magnetica nucleare.
KR100370444B1 (ko) * 1998-06-19 2003-01-30 스미토모 도큐슈 긴조쿠 가부시키가이샤 Ｍｒｉ 용 자계 발생 장치
US6281775B1 (en) * 1998-09-01 2001-08-28 Uri Rapoport Permanent magnet arrangement with backing plate
GB2341447B (en) * 1998-09-11 2003-08-20 Oxford Magnet Tech Temperature control system for a permanent magnetic mri system
US5942962A (en) * 1998-10-02 1999-08-24 Quadrant Technology Dipole magnetic structure for producing uniform magnetic field
US6259252B1 (en) 1998-11-24 2001-07-10 General Electric Company Laminate tile pole piece for an MRI, a method manufacturing the pole piece and a mold bonding pole piece tiles
US6120620A (en) * 1999-02-12 2000-09-19 General Electric Company Praseodymium-rich iron-boron-rare earth composition, permanent magnet produced therefrom, and method of making
CN1251252C (zh) 1999-02-12 2006-04-12 通用电气公司 含有铈、钕和/或镨的铁－硼－稀土型永磁材料及其生产方法
US6489872B1 (en) * 1999-05-06 2002-12-03 New Mexico Resonance Unilateral magnet having a remote uniform field region for nuclear magnetic resonance
KR100319923B1 (ko) * 1999-05-10 2002-01-09 윤종용 자기공명영상장치용 자기장 발생 장치
US6429861B1 (en) * 1999-08-03 2002-08-06 Acuson Corporation Method and apparatus for editing 3-D medical diagnostic ultrasound images
GB2400916B (en) * 1999-10-29 2004-12-29 Oxford Magnet Tech Improved magnet
EP1102077B1 (en) * 1999-11-16 2006-03-08 Neomax Co., Ltd. Pole-piece unit for an MRI magnet
CN2404130Y (zh) * 1999-12-01 2000-11-01 深圳市万济高科技产业投资发展有限公司 用于磁共振成像系统的磁体装置
US6467157B1 (en) * 2000-01-26 2002-10-22 Odin Technologies, Ltd. Apparatus for construction of annular segmented permanent magnet
US6335670B1 (en) * 2000-04-14 2002-01-01 Marconi Medical Systems Finland, Inc. Mri system with split rose ring with high homogeneity
US20030011451A1 (en) * 2000-08-22 2003-01-16 Ehud Katznelson Permanent magnet assemblies for use in medical applications
US6448772B1 (en) * 2000-10-06 2002-09-10 Sumitomo Special Metals Co., Ltd. Magnetic field adjusting apparatus, magnetic field adjusting method and recording medium
US6518754B1 (en) * 2000-10-25 2003-02-11 Baker Hughes Incorporated Powerful bonded nonconducting permanent magnet for downhole use
US6670877B2 (en) * 2001-01-25 2003-12-30 Uri Rapoport Field adjusting mechanisms and methods for permanent magnet arrangement with backplate
US6518867B2 (en) * 2001-04-03 2003-02-11 General Electric Company Permanent magnet assembly and method of making thereof
JP2003235824A (ja) * 2002-02-14 2003-08-26 Shin Etsu Chem Co Ltd Ｍｒｉ用磁界発生装置
US7148689B2 (en) * 2003-09-29 2006-12-12 General Electric Company Permanent magnet assembly with movable permanent body for main magnetic field adjustable

Similar Documents

Publication Publication Date Title
JP2005109487A5 (cg-RX-API-DMAC7.html)
JP2005103266A5 (cg-RX-API-DMAC7.html)
Pawlak Sensors and actuators in mechatronics: design and applications
JP4758629B2 (ja) 極片のないマルチリング式永久磁石並びにその製作方法
EP1321943A3 (en) Magnetic memory
ES2402081T3 (es) Unidad de motor de transducción de bobina sin hierro y sin dispersión
JP2010003354A5 (cg-RX-API-DMAC7.html)
JPWO2013186876A1 (ja) 発電デバイス
CN110459376A (zh) 具有磁性相和非磁性相的整体式结构
Müller et al. Permanent magnet materials
EP1211699A3 (en) Magnetic core having magnetically biasing bond magnet and inductance part using the same
KR100624441B1 (ko) 적층 연자성하지층을 가지는 수직자기기록매체 및 그제조방법
EP1329912A4 (en) RARE EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING THE SAME
CN104170032A (zh) 纳米颗粒、永久磁铁、发动机和发电机
JPH07169633A (ja) ヨーク一体型永久磁石の製造方法並びに当該製造方法により作製したヨーク一体型永久磁石
JP2764458B2 (ja) Ｍｒｉ用磁界発生装置
JP6099538B2 (ja) 磁歪素子利用の振動発電装置
JP2004281737A5 (cg-RX-API-DMAC7.html)
US20220139603A1 (en) Composite Permanent Magnet
EP1475783A3 (en) Magnetic recording medium
JPS6043001B2 (ja) 永久磁石アセンブリの製造方法
JPH01300696A (ja) 永久磁石を使った磁気回路
EP1681687A1 (en) Composite magnetic component and magnetic devices
Hasegawa Design and synthesis of magnetic structures
Ahn Micromachined components as integrated inductors and magnetic microactuators