KR20000017646A - 개방형 자기 공명 촬상 시스템 및 자속 콘딧 - Google Patents
개방형 자기 공명 촬상 시스템 및 자속 콘딧 Download PDFInfo
- Publication number
- KR20000017646A KR20000017646A KR1019990036354A KR19990036354A KR20000017646A KR 20000017646 A KR20000017646 A KR 20000017646A KR 1019990036354 A KR1019990036354 A KR 1019990036354A KR 19990036354 A KR19990036354 A KR 19990036354A KR 20000017646 A KR20000017646 A KR 20000017646A
- Authority
- KR
- South Korea
- Prior art keywords
- magnetic
- magnetic flux
- imaging system
- resonance imaging
- open
- 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.)
- Withdrawn
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 42
- 230000005291 magnetic effect Effects 0.000 claims abstract description 168
- 230000004907 flux Effects 0.000 claims abstract description 58
- 230000005415 magnetization Effects 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims description 19
- 238000002595 magnetic resonance imaging Methods 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 14
- 230000035699 permeability Effects 0.000 claims description 12
- 230000005284 excitation Effects 0.000 claims description 8
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- NFCWKPUNMWPHLM-UHFFFAOYSA-N [Si].[B].[Fe] Chemical compound [Si].[B].[Fe] NFCWKPUNMWPHLM-UHFFFAOYSA-N 0.000 claims description 3
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- VGOLXRRUPFZREF-UHFFFAOYSA-N [B].[Ni].[Fe] Chemical compound [B].[Ni].[Fe] VGOLXRRUPFZREF-UHFFFAOYSA-N 0.000 claims 1
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 claims 1
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 5
- 210000002615 epidermis Anatomy 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 210000003491 skin Anatomy 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- NTOHYAYLNMPIJX-UHFFFAOYSA-N [P].[B].[Fe] Chemical compound [P].[B].[Fe] NTOHYAYLNMPIJX-UHFFFAOYSA-N 0.000 description 1
- QJPUVINSFCCOIL-UHFFFAOYSA-N [P].[C].[Fe] Chemical compound [P].[C].[Fe] QJPUVINSFCCOIL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000003094 perturbing effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/20—Electromagnets; Actuators including electromagnets without armatures
- H01F7/202—Electromagnets for high magnetic field strength
-
- 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
-
- 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
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/565—Correction of image distortions, e.g. due to magnetic field inhomogeneities
- G01R33/56518—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to eddy currents, e.g. caused by switching of the gradient magnetic field
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9/143,960 | 1998-08-31 | ||
| US09/143,960 US6150818A (en) | 1998-08-31 | 1998-08-31 | Low eddy current and low hysteresis magnet pole faces in MR imaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20000017646A true KR20000017646A (ko) | 2000-03-25 |
Family
ID=22506461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990036354A Withdrawn KR20000017646A (ko) | 1998-08-31 | 1999-08-30 | 개방형 자기 공명 촬상 시스템 및 자속 콘딧 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6150818A (https=) |
| EP (1) | EP0984461B1 (https=) |
| JP (1) | JP4481395B2 (https=) |
| KR (1) | KR20000017646A (https=) |
| CN (1) | CN1252977A (https=) |
| DE (1) | DE69929857T2 (https=) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6331363B1 (en) | 1998-11-06 | 2001-12-18 | Honeywell International Inc. | Bulk amorphous metal magnetic components |
| US6346337B1 (en) | 1998-11-06 | 2002-02-12 | Honeywell International Inc. | Bulk amorphous metal magnetic component |
| US6348275B1 (en) | 1998-11-06 | 2002-02-19 | Honeywell International Inc. | Bulk amorphous metal magnetic component |
| US6552639B2 (en) | 2000-04-28 | 2003-04-22 | Honeywell International Inc. | Bulk stamped amorphous metal magnetic component |
| 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 |
| 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 |
| US7084632B2 (en) * | 2002-04-01 | 2006-08-01 | Shenyang Neusoft Bopu Nmr Tech Co., Ltd. | Permanent magnet for magnet resonance |
| US6737951B1 (en) | 2002-11-01 | 2004-05-18 | Metglas, Inc. | Bulk amorphous metal inductive device |
| US6873239B2 (en) | 2002-11-01 | 2005-03-29 | Metglas Inc. | Bulk laminated amorphous metal inductive device |
| ITSV20030011A1 (it) * | 2003-03-31 | 2004-10-01 | Esaote Spa | Struttura magnetica per macchine di acquisiszione di |
| US7235910B2 (en) | 2003-04-25 | 2007-06-26 | Metglas, Inc. | Selective etching process for cutting amorphous metal shapes and components made thereof |
| US6937018B2 (en) * | 2003-10-31 | 2005-08-30 | General Electric Company | Systems and methods for fabricating pole pieces for magnetic resonance imaging systems |
| ITSV20040016A1 (it) * | 2004-04-13 | 2004-07-13 | Esaote Spa | Macchina per risonanza magnetico nucleare |
| JP2006149722A (ja) * | 2004-11-30 | 2006-06-15 | Ge Medical Systems Global Technology Co Llc | マグネットシステムおよびｍｒｉ装置 |
| CN101256221B (zh) * | 2007-02-28 | 2010-09-29 | 西门子（中国）有限公司 | 一种减小梯度磁场导致的涡流的方法 |
| US20110234347A1 (en) * | 2010-03-24 | 2011-09-29 | Aspect Magnet Technologies Ltd. | Pole piece for permanent magnet mri systems |
| JP2014236827A (ja) * | 2013-06-07 | 2014-12-18 | 株式会社日立メディコ | 磁気共鳴イメージング装置 |
| CN103860178B (zh) * | 2014-03-21 | 2016-04-06 | 沈阳中北真空磁电科技有限公司 | 一种用于核磁共振成像仪的永磁体 |
| CN103892834B (zh) * | 2014-03-21 | 2016-05-25 | 沈阳中北真空磁电科技有限公司 | 一种用于核磁共振成像仪的永磁体 |
| JP6368625B2 (ja) * | 2014-11-18 | 2018-08-01 | 株式会社日立製作所 | 磁気共鳴イメージング装置 |
| CN104407314A (zh) * | 2014-11-26 | 2015-03-11 | 江苏美时医疗技术有限公司 | 一种永磁体抗涡流组件 |
| EP4019995B1 (en) * | 2020-12-22 | 2023-08-16 | Bruker BioSpin GmbH | Epr spectrometer with at least one pole piece made at least partially of a function material |
| US12099104B2 (en) | 2023-01-20 | 2024-09-24 | Fujifilm Healthcare Americas Corporation | Passive shield for magnetic resonance imaging gradient coils |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2951247A (en) * | 1946-02-19 | 1960-08-30 | Halpern Otto | Isotropic absorbing layers |
| US4675609A (en) * | 1985-09-18 | 1987-06-23 | Fonar Corporation | Nuclear magnetic resonance apparatus including permanent magnet configuration |
| US4827235A (en) * | 1986-07-18 | 1989-05-02 | Kabushiki Kaisha Toshiba | Magnetic field generator useful for a magnetic resonance imaging instrument |
| JPH01142028A (ja) * | 1987-11-30 | 1989-06-02 | Kawasaki Steel Corp | 磁気特性の優れた厚肉鋼材の製造方法 |
| US5061897A (en) * | 1990-03-23 | 1991-10-29 | Fonar Corporation | Eddy current control in magnetic resonance imaging |
| US5252924A (en) * | 1991-11-18 | 1993-10-12 | Sumitomo Special Metals Co., Ltd. | Magnetic field generating apparatus for MRI |
| SG43224A1 (en) * | 1990-09-29 | 1997-10-17 | Sumitomo Spec Metals | Magnetic field generating device used for MRI |
| US5470646A (en) * | 1992-06-11 | 1995-11-28 | Kabushiki Kaisha Toshiba | Magnetic core and method of manufacturing core |
| US5495171A (en) * | 1993-01-19 | 1996-02-27 | Fonar Corporation | Eddy current control in NMR imaging systems |
| FI105293B (fi) * | 1993-06-08 | 2000-07-14 | Picker Nordstar Oy | Magneettikuvaukseen käytettävän magneetin napakenkä |
| GB9320043D0 (en) * | 1993-09-29 | 1993-11-17 | Oxford Magnet Rechnology Limit | Improvements in or relating to mri magnets |
-
1998
- 1998-08-31 US US09/143,960 patent/US6150818A/en not_active Expired - Lifetime
-
1999
- 1999-08-23 JP JP23487599A patent/JP4481395B2/ja not_active Expired - Fee Related
- 1999-08-26 DE DE69929857T patent/DE69929857T2/de not_active Expired - Fee Related
- 1999-08-26 EP EP99306780A patent/EP0984461B1/en not_active Expired - Lifetime
- 1999-08-30 KR KR1019990036354A patent/KR20000017646A/ko not_active Withdrawn
- 1999-08-31 CN CN99118614A patent/CN1252977A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE69929857T2 (de) | 2006-11-02 |
| JP2000083925A (ja) | 2000-03-28 |
| DE69929857D1 (de) | 2006-04-20 |
| CN1252977A (zh) | 2000-05-17 |
| EP0984461A2 (en) | 2000-03-08 |
| EP0984461A3 (en) | 2000-12-06 |
| US6150818A (en) | 2000-11-21 |
| JP4481395B2 (ja) | 2010-06-16 |
| EP0984461B1 (en) | 2006-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19990830 |
|
| PG1501 | Laying open of application | ||
| PC1203 | Withdrawal of no request for examination | ||
| WITN | Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid |