JP2004305744A - Mri用磁場生成器の中心磁場を調節するための方法及び装置 - Google Patents
Mri用磁場生成器の中心磁場を調節するための方法及び装置 Download PDFInfo
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- JP2004305744A JP2004305744A JP2004109822A JP2004109822A JP2004305744A JP 2004305744 A JP2004305744 A JP 2004305744A JP 2004109822 A JP2004109822 A JP 2004109822A JP 2004109822 A JP2004109822 A JP 2004109822A JP 2004305744 A JP2004305744 A JP 2004305744A
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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
- G01R33/387—Compensation of inhomogeneities
- G01R33/3873—Compensation of inhomogeneities using ferromagnetic bodies ; Passive shimming
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Abstract
【解決手段】 MRIシステムの製品ラインが第1のMRIシステム(10)を含み、第1のMRIシステムは、第1のヨーク(12)と、該第1のヨーク上に配置された第1の中央組立体(30)を形成する複数の磁石ブロック(18)とを含んでいる。製品ラインはまた第2のMRIシステム(10)も含み、第2のMRIシステムは、第2のヨーク(12)と、該第2のヨーク上に配置され且つ前記第1の中央組立体と同じ形状を持つ第2の中央組立体(30)を形成する複数の磁石ブロック(18)と、第2の中央組立体の周縁で第2のヨークに取り付けられた第1組の磁石ブロック(32,34,36,38,40)を含んでいる。
【選択図】 図4
Description
但し、以下の制約を受ける:
−Imax ≦Ii- ≦0 式(2)
0≦Ii+ ≦Imax 式(3)
YL ≦Yj ≦YU 式(4)
BL ≦AX≦BU 式(5)。
12 板状ヨーク
14 柱状ヨーク
16 C字形ヨーク
18 磁石ブロック
20 磁極片基部
22 支持リング
24 磁極片
25 ギャップ
26 電子回路
28 表示装置
Claims (4)
- MRIシステムの製品ラインであって、
第1のヨーク(12)と、該第1のヨーク上に配置された第1の中央組立体(30)を形成する複数の磁石ブロック(18)とを含んでいる第1のMRIシステム(10)と、
第2のヨーク(12)と、該第2のヨーク上に配置され且つ前記第1の中央組立体と同じ形状を持つ第2の中央組立体(30)を形成する複数の磁石ブロック(18)と、前記第2の中央組立体の周縁で前記第2のヨークに取り付けられた第1組の磁石ブロック(32,34,36,38,40)とを含んでいる第2のMRIシステム(10)と、
を有している製品ライン。 - 前記第1のMRIシステム(10)は更に、前記第1の中央組立体(30)の周縁で前記第1のヨーク(12)に取り付けられた第2組の磁石ブロック(32,34,36,38,40)を含んでおり、該第2組の磁石ブロックは前記第1組の磁石ブロックとは異なる配置構成である、請求項1記載の製品ライン。
- 前記第1組の磁石ブロック(32,34,36,38,40)は一組の半ブロック(32,34)を含んでいる、請求項1記載の製品ライン。
- 前記第2のMRIシステム(10)は更に、前記第1組に隣接して前記第2のヨーク(12)上に配置された第2組の半ブロック(32,34)を含んでいる、請求項3記載の製品ライン。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/407,887 | 2003-04-04 | ||
US10/407,887 US6844801B2 (en) | 2003-03-21 | 2003-04-04 | Methods and apparatus for adjusting center magnetic field of a magnetic field generator for MRI |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004305744A true JP2004305744A (ja) | 2004-11-04 |
JP2004305744A5 JP2004305744A5 (ja) | 2007-05-17 |
JP4783556B2 JP4783556B2 (ja) | 2011-09-28 |
Family
ID=32869178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004109822A Expired - Fee Related JP4783556B2 (ja) | 2003-04-04 | 2004-04-02 | Mri用磁場生成器の中心磁場を調節するための方法及び装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US6844801B2 (ja) |
EP (1) | EP1467220A3 (ja) |
JP (1) | JP4783556B2 (ja) |
CN (1) | CN100536769C (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011503541A (ja) * | 2007-11-06 | 2011-01-27 | ティツー・バイオシステムズ・インコーポレーテッド | 磁気共鳴緩和測定用の小型の磁石およびrfコイル |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4743117B2 (ja) * | 2004-07-01 | 2011-08-10 | 日立金属株式会社 | 磁界発生装置 |
US20070285197A1 (en) * | 2006-06-08 | 2007-12-13 | General Electric Company | Method for disassembling a magnetic field generator |
CA2780181C (en) * | 2009-12-02 | 2019-10-15 | Nanalysis Corp. | Method and apparatus for producing homogeneous magnetic fields |
CN106556813B (zh) * | 2016-11-25 | 2021-09-24 | 上海辰光医疗科技股份有限公司 | 一种磁共振***中主动匀场线圈的线性混合优化方法 |
Citations (7)
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JPH01283905A (ja) * | 1988-05-11 | 1989-11-15 | Hitachi Medical Corp | Mri装置用均一磁場の偏位方法及びそれを用いた静磁場発生装置 |
JPH0394732A (ja) * | 1989-09-08 | 1991-04-19 | Sumitomo Special Metals Co Ltd | Mri用磁界発生装置 |
JPH05152120A (ja) * | 1991-11-29 | 1993-06-18 | Shin Etsu Chem Co Ltd | 磁場発生装置及び磁場均一度調整方法 |
JP2001046351A (ja) * | 1999-08-12 | 2001-02-20 | Sumitomo Special Metals Co Ltd | 磁界発生装置およびその組立方法 |
JP2002177243A (ja) * | 2000-10-06 | 2002-06-25 | Sumitomo Special Metals Co Ltd | 磁界調整用装置、磁界調整方法および記録媒体 |
JP2002272699A (ja) * | 2001-03-13 | 2002-09-24 | Shin Etsu Chem Co Ltd | Mri用磁場発生装置 |
JP2003024296A (ja) * | 2001-07-04 | 2003-01-28 | Ge Medical Systems Global Technology Co Llc | 静磁界調整方法およびmri装置 |
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JPH03131234A (ja) * | 1989-07-07 | 1991-06-04 | Sumitomo Special Metals Co Ltd | Mri用磁界発生装置 |
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JP3705861B2 (ja) * | 1996-03-21 | 2005-10-12 | 株式会社日立メディコ | 超電導磁石装置及びその着磁調整方法 |
JP2953659B1 (ja) * | 1998-08-06 | 1999-09-27 | 住友特殊金属株式会社 | Mri用磁界発生装置およびその組立方法並びにそれに用いる磁石ユニットの組立方法 |
US6358582B1 (en) | 1998-11-19 | 2002-03-19 | General Electric Company | Laminated composite shell assembly for magnet applications |
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KR100319923B1 (ko) * | 1999-05-10 | 2002-01-09 | 윤종용 | 자기공명영상장치용 자기장 발생 장치 |
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EP1666910B1 (en) * | 1999-11-16 | 2009-03-11 | Hitachi Metals, Ltd. | Magnetic-field generator comprising a pole-piece unit |
US6504461B2 (en) | 2001-03-26 | 2003-01-07 | General Electric Company | Open magnet with recessed field shaping coils |
-
2003
- 2003-04-04 US US10/407,887 patent/US6844801B2/en not_active Expired - Fee Related
-
2004
- 2004-03-30 EP EP04251880A patent/EP1467220A3/en not_active Ceased
- 2004-04-01 CN CNB2004100321494A patent/CN100536769C/zh not_active Expired - Fee Related
- 2004-04-02 JP JP2004109822A patent/JP4783556B2/ja not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH01283905A (ja) * | 1988-05-11 | 1989-11-15 | Hitachi Medical Corp | Mri装置用均一磁場の偏位方法及びそれを用いた静磁場発生装置 |
JPH0394732A (ja) * | 1989-09-08 | 1991-04-19 | Sumitomo Special Metals Co Ltd | Mri用磁界発生装置 |
JPH05152120A (ja) * | 1991-11-29 | 1993-06-18 | Shin Etsu Chem Co Ltd | 磁場発生装置及び磁場均一度調整方法 |
JP2001046351A (ja) * | 1999-08-12 | 2001-02-20 | Sumitomo Special Metals Co Ltd | 磁界発生装置およびその組立方法 |
JP2002177243A (ja) * | 2000-10-06 | 2002-06-25 | Sumitomo Special Metals Co Ltd | 磁界調整用装置、磁界調整方法および記録媒体 |
JP2002272699A (ja) * | 2001-03-13 | 2002-09-24 | Shin Etsu Chem Co Ltd | Mri用磁場発生装置 |
JP2003024296A (ja) * | 2001-07-04 | 2003-01-28 | Ge Medical Systems Global Technology Co Llc | 静磁界調整方法およびmri装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011503541A (ja) * | 2007-11-06 | 2011-01-27 | ティツー・バイオシステムズ・インコーポレーテッド | 磁気共鳴緩和測定用の小型の磁石およびrfコイル |
US9632154B2 (en) | 2007-11-06 | 2017-04-25 | T2 Biosystems, Inc. | Small magnet and RF coil for magnetic resonance relaxometry |
Also Published As
Publication number | Publication date |
---|---|
EP1467220A3 (en) | 2005-10-26 |
CN100536769C (zh) | 2009-09-09 |
US6844801B2 (en) | 2005-01-18 |
CN1535654A (zh) | 2004-10-13 |
JP4783556B2 (ja) | 2011-09-28 |
EP1467220A2 (en) | 2004-10-13 |
US20040196126A1 (en) | 2004-10-07 |
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