CN100397093C - 磁共振设备的不规则被测体的匀场方法 - Google Patents
磁共振设备的不规则被测体的匀场方法 Download PDFInfo
- Publication number
- CN100397093C CN100397093C CNB2005100597579A CN200510059757A CN100397093C CN 100397093 C CN100397093 C CN 100397093C CN B2005100597579 A CNB2005100597579 A CN B2005100597579A CN 200510059757 A CN200510059757 A CN 200510059757A CN 100397093 C CN100397093 C CN 100397093C
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- Prior art keywords
- shimming
- measured body
- magnetic resonance
- resonance equipment
- irregular measured
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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
-
- 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
- G01R33/3875—Compensation of inhomogeneities using correction coil assemblies, e.g. active shimming
Abstract
Description
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2005100597579A CN100397093C (zh) | 2005-03-31 | 2005-03-31 | 磁共振设备的不规则被测体的匀场方法 |
US11/394,629 US7218114B2 (en) | 2005-03-31 | 2006-03-31 | Shimmed magnetic resonance imaging apparatus and shimming method therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2005100597579A CN100397093C (zh) | 2005-03-31 | 2005-03-31 | 磁共振设备的不规则被测体的匀场方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1841082A CN1841082A (zh) | 2006-10-04 |
CN100397093C true CN100397093C (zh) | 2008-06-25 |
Family
ID=37030181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB2005100597579A Expired - Fee Related CN100397093C (zh) | 2005-03-31 | 2005-03-31 | 磁共振设备的不规则被测体的匀场方法 |
Country Status (2)
Country | Link |
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US (1) | US7218114B2 (zh) |
CN (1) | CN100397093C (zh) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8271067B1 (en) * | 2003-10-17 | 2012-09-18 | General Electric Company | Method and apparatus to graphically display a pre-scan volume on a localizer image |
WO2005091012A1 (en) * | 2004-03-17 | 2005-09-29 | Koninklijke Philips Electronics N.V. | Dynamic shimset calibration for b0 offset |
US7570141B2 (en) * | 2005-12-05 | 2009-08-04 | General Electric Company | Method of designing a shim coil to reduce field settling time |
US7492158B2 (en) * | 2006-04-04 | 2009-02-17 | Esaote S.P.A. | Method for determining construction parameters of magnet structures designed to generate magnetic fields in predetermined volumes of space and method for correcting magnetic fields in predetermined volumes of space, particularly in MRI apparatus |
US9797973B2 (en) * | 2008-07-04 | 2017-10-24 | Koninklijke Philips Electronics N.V. | MR imaging with extended field of view |
WO2010080350A2 (en) * | 2008-12-18 | 2010-07-15 | Grum Teklemariam | Compact inhomogeneous permanent magnetic field generator for magnetic resonance imaging |
CN101995560B (zh) * | 2009-08-31 | 2013-11-06 | 西门子(深圳)磁共振有限公司 | 对磁场均匀性不足进行补偿的方法和装置 |
CN102640010B (zh) * | 2009-12-02 | 2015-11-25 | 纳纳利塞斯公司 | 用于产生均匀磁场的方法和装置 |
CN102879753B (zh) * | 2012-10-11 | 2015-04-08 | 中国科学院近代物理研究所 | 用于高均匀度磁体匀场线圈设计的自动化实现方法 |
CN103529411B (zh) * | 2013-11-04 | 2016-05-04 | 中国科学院武汉物理与数学研究所 | 一种基于梯度编码的自动匀场方法 |
CN104297709B (zh) * | 2014-10-31 | 2017-01-11 | 中国科学院武汉物理与数学研究所 | 一种基于正则化磁场分布图像重建的梯度匀场方法 |
CN104714201B (zh) * | 2015-02-09 | 2018-01-12 | 浙江大学 | 一种有效矫正磁共振成像系统的主磁场的方法 |
CN105184071B (zh) * | 2015-08-31 | 2017-12-05 | 河海大学 | 计算环形线圈在旋转对称区域内磁场vrms均匀度算法 |
AU2017236982A1 (en) | 2016-03-22 | 2018-10-04 | Hyperfine Operations, Inc. | Methods and apparatus for magnetic field shimming |
EP3557276A1 (de) * | 2018-04-16 | 2019-10-23 | Siemens Healthcare GmbH | Verfahren und steuereinrichtung zur erzeugung von magnetresonanzaufnahmen innerhalb und ausserhalb des b0-homogenitätsvolumens |
CN108802644B (zh) * | 2018-05-24 | 2020-09-15 | 上海东软医疗科技有限公司 | 梯度线圈的匀场方法和装置 |
CN111103561B (zh) * | 2019-12-10 | 2021-01-05 | 厦门大学 | 一种补偿磁化率的永磁体匀场线圈的设计及制作方法 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5045794A (en) * | 1989-12-04 | 1991-09-03 | General Electric Company | Method of optimizing passive shim placement in magnetic resonance magnets |
CN1085767A (zh) * | 1992-10-22 | 1994-04-27 | 广东威达医疗器械集团公司 | 均匀磁场装置 |
JP2520330B2 (ja) * | 1989-12-04 | 1996-07-31 | ゼネラル・エレクトリツク・カンパニイ | 修正コイルを有する磁石を調整する方法 |
US5760585A (en) * | 1996-08-07 | 1998-06-02 | General Electric Company | Method for actively and passively shimming a magnet |
US6509735B2 (en) * | 1999-12-10 | 2003-01-21 | Siemens Aktiengesellschaft | Method for operating a magnetic resonance tomography apparatus with shim coil adjustment dependent on positional changes of the imaged region |
CN1401295A (zh) * | 2001-08-29 | 2003-03-12 | 中国科学院武汉物理与数学研究所 | 一种用于核磁共振成象仪的永磁体 |
JP2003126059A (ja) * | 2001-10-19 | 2003-05-07 | Ge Medical Systems Global Technology Co Llc | 静磁界調整方法およびmri装置 |
CN1543913A (zh) * | 2003-11-25 | 2004-11-10 | 沈阳东软波谱磁共振技术有限公司 | 头肢磁共振成像设备用磁体 |
CN1588582A (zh) * | 2004-09-01 | 2005-03-02 | 沈阳工业大学 | 薄片形磁场全开放磁共振成像仪主磁体 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5596303A (en) * | 1993-02-22 | 1997-01-21 | Akguen Ali | Superconductive magnet system with low and high temperature superconductors |
US5418462A (en) * | 1994-05-02 | 1995-05-23 | Applied Superconetics, Inc. | Method for determining shim placement on tubular magnet |
US5396207A (en) * | 1994-08-05 | 1995-03-07 | General Electric Company | On-shoulder MRI magnet for human brain imaging |
US5677854A (en) * | 1995-01-17 | 1997-10-14 | General Electric Company | Method for passively shimming a magnet |
US5568102A (en) * | 1996-02-20 | 1996-10-22 | General Electric Company | Closed superconductive magnet with homogeneous imaging volume |
US5677630A (en) * | 1996-10-21 | 1997-10-14 | General Electric Company | Planar superconducting MRI magnet |
US6181137B1 (en) * | 1999-07-26 | 2001-01-30 | General Electric Company | Unified shimming for magnetic resonance superconducting magnets |
US6819108B2 (en) * | 2003-03-21 | 2004-11-16 | General Electric Company | Method of magnetic field controlled shimming |
-
2005
- 2005-03-31 CN CNB2005100597579A patent/CN100397093C/zh not_active Expired - Fee Related
-
2006
- 2006-03-31 US US11/394,629 patent/US7218114B2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5045794A (en) * | 1989-12-04 | 1991-09-03 | General Electric Company | Method of optimizing passive shim placement in magnetic resonance magnets |
JP2520330B2 (ja) * | 1989-12-04 | 1996-07-31 | ゼネラル・エレクトリツク・カンパニイ | 修正コイルを有する磁石を調整する方法 |
CN1085767A (zh) * | 1992-10-22 | 1994-04-27 | 广东威达医疗器械集团公司 | 均匀磁场装置 |
US5760585A (en) * | 1996-08-07 | 1998-06-02 | General Electric Company | Method for actively and passively shimming a magnet |
US6509735B2 (en) * | 1999-12-10 | 2003-01-21 | Siemens Aktiengesellschaft | Method for operating a magnetic resonance tomography apparatus with shim coil adjustment dependent on positional changes of the imaged region |
CN1401295A (zh) * | 2001-08-29 | 2003-03-12 | 中国科学院武汉物理与数学研究所 | 一种用于核磁共振成象仪的永磁体 |
JP2003126059A (ja) * | 2001-10-19 | 2003-05-07 | Ge Medical Systems Global Technology Co Llc | 静磁界調整方法およびmri装置 |
CN1543913A (zh) * | 2003-11-25 | 2004-11-10 | 沈阳东软波谱磁共振技术有限公司 | 头肢磁共振成像设备用磁体 |
CN1588582A (zh) * | 2004-09-01 | 2005-03-02 | 沈阳工业大学 | 薄片形磁场全开放磁共振成像仪主磁体 |
Also Published As
Publication number | Publication date |
---|---|
US7218114B2 (en) | 2007-05-15 |
US20060244451A1 (en) | 2006-11-02 |
CN1841082A (zh) | 2006-10-04 |
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Owner name: SIEMENS MINDIT (SHENZHEN) MAGNETIC RESONANCE CO., Free format text: FORMER OWNER: SIEMENS (CHINA) AG Effective date: 20090605 |
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Effective date of registration: 20090605 Address after: Two SIEMENS magnetic resonance garden, Gaoxin District, Shenzhen hi tech Zone, Guangdong Patentee after: SIEMENS Madit (Shenzhen) magnetic resonance Co., Ltd. Address before: No. 7 South Central Road, Chaoyang District, Beijing, Wangjing Patentee before: SIEMENS (China) Co., Ltd. |
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Owner name: SIEMENS (SHENZHEN) MAGNETIC RESONANCE LTD. Free format text: FORMER NAME: SIEMENS MINDIT (SHENZHEN) MAGNETIC RESONANCE LTD. |
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CP01 | Change in the name or title of a patent holder |
Address after: 518057 two SIEMENS magnetic resonance garden, central high tech Zone, Guangdong, Shenzhen Patentee after: Siemens (Shenzhen) Magnetic Resonance Ltd. Address before: 518057 two SIEMENS magnetic resonance garden, central high tech Zone, Guangdong, Shenzhen Patentee before: Siemens Mindit (Shenzhen) Magnetic Resonance Ltd. |
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CF01 | Termination of patent right due to non-payment of annual fee |