ATE429650T1 - Verfahren zur kompensation von durch gradienten induzierten wirbelströmen in kernspintomographen - Google Patents

Verfahren zur kompensation von durch gradienten induzierten wirbelströmen in kernspintomographen

Info

Publication number
ATE429650T1
ATE429650T1 AT03101922T AT03101922T ATE429650T1 AT E429650 T1 ATE429650 T1 AT E429650T1 AT 03101922 T AT03101922 T AT 03101922T AT 03101922 T AT03101922 T AT 03101922T AT E429650 T1 ATE429650 T1 AT E429650T1
Authority
AT
Austria
Prior art keywords
gradient
eddy currents
compensating
currents induced
gradients
Prior art date
Application number
AT03101922T
Other languages
English (en)
Inventor
Davide Carlini
Original Assignee
Esaote Spa
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 Esaote Spa filed Critical Esaote Spa
Application granted granted Critical
Publication of ATE429650T1 publication Critical patent/ATE429650T1/de

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)
AT03101922T 2002-07-01 2003-06-27 Verfahren zur kompensation von durch gradienten induzierten wirbelströmen in kernspintomographen ATE429650T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2002SV000030A ITSV20020030A1 (it) 2002-07-01 2002-07-01 Metodo di compensazione di correnti parassite causate da gradienti nelle macchine per il rilevametno d'immagini in risonanza magnetica nucle

Publications (1)

Publication Number Publication Date
ATE429650T1 true ATE429650T1 (de) 2009-05-15

Family

ID=29720173

Family Applications (1)

Application Number Title Priority Date Filing Date
AT03101922T ATE429650T1 (de) 2002-07-01 2003-06-27 Verfahren zur kompensation von durch gradienten induzierten wirbelströmen in kernspintomographen

Country Status (6)

Country Link
US (1) US6867590B2 (de)
EP (1) EP1378759B1 (de)
AT (1) ATE429650T1 (de)
DE (1) DE60327285D1 (de)
ES (1) ES2326028T3 (de)
IT (1) ITSV20020030A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6465590B1 (en) * 1998-03-30 2002-10-15 California Institute Of Technology Telechelic alkadiene polymers with crosslinkable end groups and methods for making the same
EP1647224B1 (de) * 2003-07-17 2012-06-06 Hitachi Medical Corporation Magnetresonanztomographie-verfahren und -system
JP4820063B2 (ja) * 2004-03-24 2011-11-24 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー 磁気共鳴イメージング装置
DE102006059499B4 (de) * 2006-12-15 2009-06-10 Siemens Ag Verfahren zur Reduzierung von Wirbelströmen bei einem Magnetresonanzgerät
DE102010035539B4 (de) * 2010-08-26 2012-04-05 Siemens Aktiengesellschaft Verfahren zur Kompensation von Wirbelstromfeldern in Magnetresonanzaufnahmen und Magnetresonanzeinrichtung
DE102011079578B4 (de) * 2011-07-21 2013-02-21 Siemens Aktiengesellschaft Ansteuerung von Feldspulen einer Magnetresonanzanlage mit Wirbelstromkompensation
MX2017014466A (es) 2015-05-12 2018-04-10 Tri Alpha Energy Inc Sistemas y metodos para reducir las corrientes parasitas no deseadas.
CN113498479A (zh) 2018-12-28 2021-10-12 海珀菲纳股份有限公司 校正磁共振成像中的磁滞
CN114556128A (zh) * 2019-08-15 2022-05-27 海珀菲纳运营有限公司 涡流缓解系统和方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4698591A (en) * 1986-01-03 1987-10-06 General Electric Company Method for magnetic field gradient eddy current compensation
EP0307516A1 (de) * 1987-09-18 1989-03-22 Koninklijke Philips Electronics N.V. Magnetresonanzabbildungsgerät mit Korrektionssystem für Wirbelströmeeffekte
EP0533173B1 (de) * 1991-09-19 1996-11-20 Kabushiki Kaisha Toshiba Verfahren und Apparat zur Bilderzeugung mittels magnetischer Resonanz mit der Möglichkeit der Kompensation von durch Wirbelströme gestörten Gradientenfeldern
US6448773B1 (en) * 2000-02-24 2002-09-10 Toshiba America Mri, Inc. Method and system for measuring and compensating for eddy currents induced during NMR imaging operations

Also Published As

Publication number Publication date
EP1378759B1 (de) 2009-04-22
US20040046554A1 (en) 2004-03-11
EP1378759A1 (de) 2004-01-07
ES2326028T3 (es) 2009-09-29
US6867590B2 (en) 2005-03-15
ITSV20020030A1 (it) 2004-01-02
DE60327285D1 (de) 2009-06-04

Similar Documents

Publication Publication Date Title
JP6927996B2 (ja) 磁場シミングのための方法および装置
DE602005012265D1 (de) Magnetresonanzabbildungssystem mit eisenunterstütztem magnetfeldgradientensystem
Chronik et al. Design and fabrication of a three‐axis edge ROU head and neck gradient coil
EP1408341A3 (de) Magnetresonanzangiographie mit einer Phasenkodierrichtung parallel zur untersuchten Flussrichtung
CN103961101A (zh) 磁共振成像设备及其控制方法
ATE429650T1 (de) Verfahren zur kompensation von durch gradienten induzierten wirbelströmen in kernspintomographen
WO2002042789A3 (en) Real-time multi-axis gradient distortion correction using an interactive shim set
JP3209982B2 (ja) Ｍｒｉ装置用勾配コイル、ｍｒｉ装置用勾配コイルの製造方法およびｍｒｉ装置
JP2019524177A5 (de)
JP2008020266A (ja) 超電導マグネット装置
NL1026189C2 (nl) Systemen en werkwijze voor gradientcompensatie bij magnetische-resonantiebeeldvorming.
KR101902934B1 (ko) 자석 특성 측정시스템 및 와전류 오차 보상방법
GB2319844A (en) Prepolarising MRI magnet with powdered iron poles
Hofman et al. Building a combined cyclotron and MRI facility: Implications for interference
Terada et al. Development of a temperature-variable magnetic resonance imaging system using a 1.0 T yokeless permanent magnet
JP4486575B2 (ja) 磁場調整用シムボード、磁場調整装置および磁場調整方法
JP2580747B2 (ja) Ｍｒｉ装置の傾斜磁場印加方法
US6538432B1 (en) Hysteresis loop tracer with symmetric balance coil
ATE310962T1 (de) Verfahren, instrument und system zur durchführung von kontrollmessungen und korrekturen von magnetischen feldern in magneten von mri- maschinen
Enokizono et al. A measurement system for two-dimensional DC-biased properties of magnetic materials
ATE541220T1 (de) Bildgebendes nmr-verfahren sowie nmr-vorrichtung
JP4820063B2 (ja) 磁気共鳴イメージング装置
Yao et al. The Optimal Design of Passive Shimming Elements for High Homogeneous Permanent Magnets Utilizing Sensitivity Analysis
JP2002156432A (ja) 超伝導磁石コイル系と磁場形成デバイスを備える磁石装置及び寸法設計方法
Takahashi et al. 3-D FEM analysis of residual magnetism produced by x-gradient coil of permanent magnet type of MRI

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties