IL122623A - Method for measuring and compensating for spatially and temporally varying magnetic fields induced by eddy currents - Google Patents

Method for measuring and compensating for spatially and temporally varying magnetic fields induced by eddy currents

Info

Publication number
IL122623A
IL122623A IL12262397A IL12262397A IL122623A IL 122623 A IL122623 A IL 122623A IL 12262397 A IL12262397 A IL 12262397A IL 12262397 A IL12262397 A IL 12262397A IL 122623 A IL122623 A IL 122623A
Authority
IL
Israel
Prior art keywords
spatially
compensating
measuring
magnetic fields
eddy currents
Prior art date
Application number
IL12262397A
Other languages
English (en)
Other versions
IL122623A0 (en
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Publication of IL122623A0 publication Critical patent/IL122623A0/xx
Publication of IL122623A publication Critical patent/IL122623A/xx

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
    • G01R33/44—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)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
IL12262397A 1996-12-30 1997-12-16 Method for measuring and compensating for spatially and temporally varying magnetic fields induced by eddy currents IL122623A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/777,561 US5770943A (en) 1996-12-30 1996-12-30 Method for measuring and compensating for spatially and temporally varying magnetic fields induced by eddy currents

Publications (2)

Publication Number Publication Date
IL122623A0 IL122623A0 (en) 1998-08-16
IL122623A true IL122623A (en) 2000-02-17

Family

ID=25110591

Family Applications (1)

Application Number Title Priority Date Filing Date
IL12262397A IL122623A (en) 1996-12-30 1997-12-16 Method for measuring and compensating for spatially and temporally varying magnetic fields induced by eddy currents

Country Status (6)

Country Link
US (1) US5770943A (ja)
JP (1) JP4114989B2 (ja)
KR (1) KR100481740B1 (ja)
CN (1) CN1113248C (ja)
DE (1) DE19750637B4 (ja)
IL (1) IL122623A (ja)

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CN103649782B (zh) * 2011-05-02 2016-12-28 磁共振创新有限公司 催化多回波相位展开方法
CN102298129B (zh) * 2011-05-30 2014-07-09 苏州朗润医疗***有限公司 一种用于核磁共振成像***的涡流测量及补偿方法
JPWO2013002232A1 (ja) * 2011-06-30 2015-02-23 株式会社日立メディコ 磁気共鳴イメージング装置及びその傾斜磁場出力波形の測定方法
JP6139119B2 (ja) * 2012-01-13 2017-05-31 東芝メディカルシステムズ株式会社 磁気共鳴イメージング装置
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CN102944784A (zh) * 2012-11-07 2013-02-27 丰盛科技集团有限公司 一种mri梯度线圈涡流测量装置及方法
KR101473872B1 (ko) * 2013-02-05 2014-12-18 삼성전자 주식회사 자기공명영상장치 및 그 제어방법
US9268003B2 (en) * 2013-02-13 2016-02-23 Sunnybrook Health Sciences Centre System and method for measuring induced radio frequency current using phase contrast magnetic resonance imaging
KR101474757B1 (ko) 2013-07-08 2014-12-19 삼성전자주식회사 자장 측정 방법 및 장치
CN104614694B (zh) * 2015-01-27 2017-05-24 华东师范大学 一种磁共振梯度涡流补偿方法
HUE052181T2 (hu) * 2015-05-12 2021-04-28 Tae Tech Inc Összeállítások és eljárások a nemkívánatos örvényáramok csökkentésére
EP3304098A4 (en) * 2015-05-29 2019-01-23 Mayo Foundation for Medical Education and Research SYSTEMS AND METHOD FOR THE SIMULTANEOUS FIELD CORRECTION IN MAGNETIC RESONANCE IMAGING WITH ASYMMETRIC GRADIENTS
US9911062B1 (en) * 2015-10-20 2018-03-06 Ohio State Innovation Foundation Background phase correction for quantitative cardiovascular MRI
DE102015222114A1 (de) * 2015-11-10 2017-05-11 Siemens Healthcare Gmbh Verfahren zum Ansteuern einer Shimeinheit, Steuereinheit und Magnetresonanzgerät
CN108279393A (zh) * 2017-01-05 2018-07-13 上海康达卡勒幅医疗科技有限公司 一种磁共振成像全自动预加重校正涡流的方法
DE102018200239B4 (de) 2018-01-09 2022-09-22 Siemens Healthcare Gmbh Verfahren und Magnetresonanzanlage zur Artefaktvermeidung un-ter Bestimmung von einer von Wirbelströmen hervorgerufenen Phasendifferenz für eine Magnetresonanzanlage
EP3640661A1 (en) * 2018-10-16 2020-04-22 Siemens Healthcare GmbH Method and control unit for active compensation of eddy current induced magnetic fields in magnetic resonance imaging
CN109633757B (zh) * 2019-02-18 2020-10-20 中国科学院上海微***与信息技术研究所 涡流补偿方法及涡流补偿***
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CN111462975B (zh) * 2020-03-31 2021-05-18 清华大学 一种磁场产生方法、同步加速器、存储介质和设备
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Also Published As

Publication number Publication date
IL122623A0 (en) 1998-08-16
JP4114989B2 (ja) 2008-07-09
US5770943A (en) 1998-06-23
KR19980064809A (ko) 1998-10-07
CN1188897A (zh) 1998-07-29
DE19750637A1 (de) 1998-07-02
KR100481740B1 (ko) 2005-07-12
CN1113248C (zh) 2003-07-02
DE19750637B4 (de) 2009-04-02
JPH10272120A (ja) 1998-10-13

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