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
JP2005109487A (ja
JP4758629B2 (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 (2) 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 (2)
JP (1) JP4758629B2 (2)
CN (1) CN100444290C (2)
IT (1) ITMI20041679A1 (2)

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
EP2511724B1 (en) * 2008-06-24 2019-03-13 Alberta Health Services Method of defining a magnetic field for an imaging volume
US8040007B2 (en) * 2008-07-28 2011-10-18 Direct Drive Systems, Inc. Rotor for electric machine having a sleeve with segmented layers
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
WO2017132285A1 (en) * 2016-01-25 2017-08-03 Ut-Battelle, Llc Neodymium-iron-boron magnet with selective surface modification, and method of producing same
US11988730B2 (en) 2016-08-08 2024-05-21 Aspect Imaging Ltd. Device, system and method for obtaining a magnetic measurement with permanent magnets
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
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
AU2019274404A1 (en) * 2018-05-21 2020-11-12 Hyperfine Operations, Inc. B0 magnet methods and apparatus for a magnetic resonance imaging system
CA3121601A1 (en) 2018-11-29 2020-06-04 Epsitau Ltd. Lightweight asymmetric magnet arrays with mixed-phase magnet rings
WO2020109894A1 (en) 2018-11-29 2020-06-04 Epsitau Ltd. Lightweight asymmetric magnet arrays
JP7369470B2 (ja) 2018-11-29 2023-10-26 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
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
DE3566185D1 (en) 1984-04-11 1988-12-15 Sumitomo Spec Metals 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
EP0262880B1 (en) 1986-09-27 1992-06-10 Sumitomo Special Metals Co. Ltd. Magnetic field generating device for nmr-ct
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
US5063934A (en) 1987-10-07 1991-11-12 Advanced Techtronics, Inc. Permanent magnet arrangement
US4998976A (en) 1987-10-07 1991-03-12 Uri Rapoport 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.
DE69129687T2 (de) 1990-09-29 1999-03-11 Sumitomo Special Metals Co., Ltd., Osaka Vorrichtung zur Erzeugung eines Magnetfeldes für die Bildgebung mittels magnetischer Resonanz
JP2816256B2 (ja) 1991-03-25 1998-10-27 株式会社日立製作所 コイル体
EP0541872B1 (en) 1991-11-15 2000-01-26 Sumitomo Special Metals Co., Ltd. Magnetic field generating apparatus for MRI
JP2767659B2 (ja) 1991-12-17 1998-06-18 信越化学工業株式会社 磁場発生装置
DE69318998T2 (de) 1992-02-15 1998-10-15 Santoku Metal Ind Legierungsblock für einen Dauermagnet, anisotropes Pulver für einen Dauermagnet, Verfahren zur Herstellung eines solchen und Dauermagneten
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
US6157278A (en) * 1997-07-23 2000-12-05 Odin Technologies Ltd. Hybrid magnetic apparatus for use in medical applications
US6411187B1 (en) * 1997-07-23 2002-06-25 Odin Medical Technologies, Ltd. Adjustable hybrid magnetic apparatus
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
KR100373577B1 (ko) 1997-12-26 2003-02-26 스미토모 도큐슈 긴조쿠 가부시키가이샤 자기 공명 촬영 장치용 자계 발생 장치
US6255670B1 (en) 1998-02-06 2001-07-03 General Electric Company Phosphors for light generation from light emitting semiconductors
WO1999040593A1 (en) 1998-02-09 1999-08-12 Odin Medical Technologies Ltd A method for designing open magnets and open magnetic apparatus for use in mri/mrt probes
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.
DE69935702T2 (de) * 1998-06-19 2007-12-27 Neomax Co., Ltd. Magnet für die bildgebende magnetische resonanz
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
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
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
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
GB2355800B (en) * 1999-10-29 2004-10-27 Oxford Magnet Tech Improved magnet
EP1666910B1 (en) 1999-11-16 2009-03-11 Hitachi Metals, Ltd. Magnetic-field generator comprising a pole-piece unit
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 (2)
JP2005103266A5 (2)
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
JP2006519479A (ja) 強磁性形状記憶合金複合材料および前記材料を組み込んだアクチュエータの設計
ES2402081T3 (es) Unidad de motor de transducción de bobina sin hierro y sin dispersión
JP2010003354A5 (2)
JP2004118894A (ja) ディスク状磁気記録媒体
EP1329912A4 (en) RARE EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING THE SAME
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
JP6099538B2 (ja) 磁歪素子利用の振動発電装置
US8300445B2 (en) Nanowire and memory device using it as a medium for current-induced domain wall displacement
CN114530960B (zh) 马达
US20220139603A1 (en) Composite Permanent Magnet
EP0945857A3 (en) Magnetic recording medium
EP1475783A3 (en) Magnetic recording medium
Hasegawa Design and synthesis of magnetic structures
JPH01300696A (ja) 永久磁石を使った磁気回路
JP2004342796A (ja) 磁界発生装置
JP2000215413A5 (2)
JP2005105415A (ja) 医用イメージング・システム向けの永久磁石合金、並びにその製作方法
KR101737510B1 (ko) 축방향 자화자석을 이용한 관 모양 영구자석 발전기
JP2003257751A (ja) 磁気シールド装置
JPH0443401B2 (2)
CN110685485A (zh) 一种非线性电磁颗粒阻尼器