FI105293B - Magneettikuvaukseen käytettävän magneetin napakenkä - Google Patents

Magneettikuvaukseen käytettävän magneetin napakenkä Download PDF

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Publication number
FI105293B
FI105293B FI932615A FI932615A FI105293B FI 105293 B FI105293 B FI 105293B FI 932615 A FI932615 A FI 932615A FI 932615 A FI932615 A FI 932615A FI 105293 B FI105293 B FI 105293B
Authority
FI
Finland
Prior art keywords
polar shoe
shoe according
polar
iron
gradient
Prior art date
Application number
FI932615A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI932615A0 (fi
FI932615A (fi
Inventor
Ilmari Kinanen
Original Assignee
Picker Nordstar Oy
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 Picker Nordstar Oy filed Critical Picker Nordstar Oy
Priority to FI932615A priority Critical patent/FI105293B/fi
Publication of FI932615A0 publication Critical patent/FI932615A0/fi
Priority to US08/255,330 priority patent/US5555251A/en
Priority to CN94108867A priority patent/CN1090010C/zh
Publication of FI932615A publication Critical patent/FI932615A/fi
Application granted granted Critical
Publication of FI105293B publication Critical patent/FI105293B/fi

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
    • G01R33/383—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/349—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor with multiple brush bodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/40—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like orbiting, e.g. nutating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3436—Rotation around the axis perpendicular to the plane defined by the bristle holder
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3454—Translation along the axis perpendicular of the axis of toothbrush handle and in the plane defined by the bristle holder
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C2204/00—Features not otherwise provided for
    • A61C2204/002—Features not otherwise provided for using batteries

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
FI932615A 1993-06-08 1993-06-08 Magneettikuvaukseen käytettävän magneetin napakenkä FI105293B (fi)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI932615A FI105293B (fi) 1993-06-08 1993-06-08 Magneettikuvaukseen käytettävän magneetin napakenkä
US08/255,330 US5555251A (en) 1993-06-08 1994-06-07 Arrangement to minimize eddy currents in MR imagers
CN94108867A CN1090010C (zh) 1993-06-08 1994-06-08 用于降低磁共振成象设备中的涡流的装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI932615A FI105293B (fi) 1993-06-08 1993-06-08 Magneettikuvaukseen käytettävän magneetin napakenkä
FI932615 1993-06-08

Publications (3)

Publication Number Publication Date
FI932615A0 FI932615A0 (fi) 1993-06-08
FI932615A FI932615A (fi) 1994-12-09
FI105293B true FI105293B (fi) 2000-07-14

Family

ID=8538094

Family Applications (1)

Application Number Title Priority Date Filing Date
FI932615A FI105293B (fi) 1993-06-08 1993-06-08 Magneettikuvaukseen käytettävän magneetin napakenkä

Country Status (3)

Country Link
US (1) US5555251A (zh)
CN (1) CN1090010C (zh)
FI (1) FI105293B (zh)

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GB2295672B (en) * 1994-11-29 1999-05-12 Oxford Magnet Tech Improvements in or relating to cryogenic MRI magnets
GB9513544D0 (en) * 1995-07-04 1995-09-06 Marconi Gec Ltd Magnetic resonance methods and apparatus
JP3143371B2 (ja) * 1995-09-19 2001-03-07 信越化学工業株式会社 磁気共鳴イメージング装置
JP3537951B2 (ja) * 1996-03-12 2004-06-14 株式会社東芝 磁気共鳴診断装置
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
GB2319844A (en) * 1996-11-28 1998-06-03 Marconi Gec Ltd Prepolarising MRI magnet with powdered iron poles
US5977771A (en) * 1997-11-03 1999-11-02 Picker International, Inc. Single gradient coil configuration for MRI systems with orthogonal directed magnetic fields
US6144204A (en) * 1997-11-28 2000-11-07 Picker Nordstar Oy Gradient coils for magnetic resonance meeting
DE69737511T2 (de) * 1997-12-26 2007-07-26 Neomax Co., Ltd. Magnetfeld-Erzeuger für die Bildgebende Magnetische Resonanz
US6218838B1 (en) * 1998-08-28 2001-04-17 Picker International, Inc. MRI magnet with high homogeneity, patient access, and low forces on the driver coils
US6150818A (en) * 1998-08-31 2000-11-21 General Electric Company Low eddy current and low hysteresis magnet pole faces in MR imaging
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
GB2400916B (en) * 1999-10-29 2004-12-29 Oxford Magnet Tech Improved magnet
US6973711B1 (en) 2000-05-24 2005-12-13 Fonar Corporation Method for making pieces for a magnetic resonance imaging magnet
ITSV20000023A1 (it) * 2000-06-15 2001-12-15 Esaote Spa Procedimento per la realizzazione di dispositivi di generazione di campi magnetici nelle macchine per il rilevamento di immagini in risonanz
JP4369613B2 (ja) * 2000-11-20 2009-11-25 株式会社日立メディコ 磁気共鳴イメージング装置
US20020073441A1 (en) 2000-12-13 2002-06-13 Ross Brian D. Compositions and methods for detecting proteolytic activity
JP3905039B2 (ja) * 2000-12-22 2007-04-18 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Ｍｒｉ装置
US6445095B1 (en) * 2001-01-11 2002-09-03 Ford Global Technologies, Inc. Electric machine with laminated cooling rings
WO2002087543A1 (en) * 2001-05-01 2002-11-07 Biozone Laboratories, Inc. Sustained release formulations for nifedipine, dextromethorphan, and danazol
DE10200861A1 (de) * 2002-01-11 2003-07-31 Siemens Ag Magnetresonanzgerät mit einem Wirbelstromerzeuger
US7084632B2 (en) 2002-04-01 2006-08-01 Shenyang Neusoft Bopu Nmr Tech Co., Ltd. Permanent magnet for magnet resonance
CN2542205Y (zh) * 2002-04-01 2003-04-02 沈阳东软数字医疗系统股份有限公司 两立柱开放式c型永磁型磁共振磁体
DE10304249B4 (de) * 2003-02-03 2007-04-12 Siemens Ag Magnetresonanzgerät mit einer Gradientenspule und einer elektrisch leitfähigen Struktur
ITSV20030011A1 (it) * 2003-03-31 2004-10-01 Esaote Spa Struttura magnetica per macchine di acquisiszione di
CN100504432C (zh) * 2003-05-23 2009-06-24 西门子（中国）有限公司 磁共振设备中的静磁场调节方法及其静磁场发生装置
DE602004028513D1 (de) 2003-12-23 2010-09-16 Mount Sinai Hospital Corp Verfahren zum nachweis von mit endometrialer krankheit oder phase assoziierten markern
US20060088475A1 (en) * 2004-05-10 2006-04-27 Northwestern University Self-immolative magnetic resonance imaging contrast agents sensitive to beta-glucuronidase
US7081753B2 (en) * 2004-07-26 2006-07-25 Varian, Inc. Multiple tuned scroll coil
CN100339050C (zh) * 2005-09-20 2007-09-26 华东师范大学 一种磁共振成像系统中减小梯度线圈涡流的方法
US9364293B2 (en) 2006-04-28 2016-06-14 Biosense Webster, Inc. Reduced field distortion in medical tools
JP4886482B2 (ja) * 2006-11-21 2012-02-29 株式会社日立製作所 超電導磁石装置及び核磁気共鳴イメージング装置
JP5657858B2 (ja) * 2007-09-21 2015-01-21 株式会社東芝 磁気共鳴装置用ガントリおよび磁気共鳴装置
CA2618163A1 (en) 2008-02-07 2009-08-07 K. W. Michael Siu Head and neck cancer biomarkers
EP3046487B1 (en) * 2013-09-18 2020-11-11 Koninklijke Philips N.V. Interventional tool stepper for electromagnetic tracking
EP3553547A1 (en) 2018-04-12 2019-10-16 Koninklijke Philips N.V. Shim irons for a magnetic resonance apparatus
CN109659110A (zh) * 2018-12-29 2019-04-19 佛山瑞加图医疗科技有限公司 匀场环及具有该匀场环的磁共振磁体

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US4827235A (en) * 1986-07-18 1989-05-02 Kabushiki Kaisha Toshiba Magnetic field generator useful for a magnetic resonance imaging instrument
JPS63241905A (ja) * 1987-03-27 1988-10-07 Sumitomo Special Metals Co Ltd 磁界発生装置
GB2215522B (en) * 1988-02-26 1990-11-28 Picker Int Ltd Magnet arrangements
JPH0287505A (ja) * 1988-09-22 1990-03-28 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置
JPH02184002A (ja) * 1989-01-10 1990-07-18 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置
US5134374A (en) * 1989-06-01 1992-07-28 Applied Superconetics Magnetic field control apparatus
US5243286A (en) * 1990-06-06 1993-09-07 Advanced Nmr Systems, Inc. Split shield for magnetic resonance imaging
SG43224A1 (en) * 1990-09-29 1997-10-17 Sumitomo Spec Metals Magnetic field generating device used for MRI
US5124651A (en) * 1990-10-24 1992-06-23 Fonar Corporation Nuclear magnetic resonance scanners with composite pole facings
US5414399A (en) * 1991-12-19 1995-05-09 Applied Superconetics, Inc. Open access superconducting MRI magnet having an apparatus for reducing magnetic hysteresis in superconducting MRI systems

Also Published As

Publication number Publication date
FI932615A0 (fi) 1993-06-08
US5555251A (en) 1996-09-10
CN1090010C (zh) 2002-09-04
FI932615A (fi) 1994-12-09
CN1102971A (zh) 1995-05-31

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