FI904103A0 - Foerfarande foer avbildning av ett rf-saendnings- och ett mottagningsfaelt i ett nmr-system. - Google Patents

Foerfarande foer avbildning av ett rf-saendnings- och ett mottagningsfaelt i ett nmr-system.

Info

Publication number
FI904103A0
FI904103A0 FI904103A FI904103A FI904103A0 FI 904103 A0 FI904103 A0 FI 904103A0 FI 904103 A FI904103 A FI 904103A FI 904103 A FI904103 A FI 904103A FI 904103 A0 FI904103 A0 FI 904103A0
Authority
FI
Finland
Prior art keywords
ett
saendnings
mottagningsfaelt
avbildning
nmr
Prior art date
Application number
FI904103A
Other languages
English (en)
Inventor
Joseph Kenneth Maier
Gary Harold Glover
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 FI904103A0 publication Critical patent/FI904103A0/fi

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
    • G01R33/24—Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/246—Spatial mapping of the RF magnetic field B1
    • 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
    • G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
    • G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
FI904103A 1989-08-21 1990-08-20 Foerfarande foer avbildning av ett rf-saendnings- och ett mottagningsfaelt i ett nmr-system. FI904103A0 (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/396,578 US5001428A (en) 1989-08-21 1989-08-21 Method for mapping the RF transmit and receive field in an NMR system

Publications (1)

Publication Number Publication Date
FI904103A0 true FI904103A0 (fi) 1990-08-20

Family

ID=23567817

Family Applications (1)

Application Number Title Priority Date Filing Date
FI904103A FI904103A0 (fi) 1989-08-21 1990-08-20 Foerfarande foer avbildning av ett rf-saendnings- och ett mottagningsfaelt i ett nmr-system.

Country Status (5)

Country Link
US (1) US5001428A (fi)
EP (1) EP0414474A3 (fi)
JP (1) JPH0616765B2 (fi)
FI (1) FI904103A0 (fi)
IL (1) IL95294A0 (fi)

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US5107215A (en) * 1990-06-25 1992-04-21 General Electric Rf power calibration for an nmr scanner
JP3137366B2 (ja) * 1991-07-19 2001-02-19 株式会社東芝 磁気共鳴イメージング装置
US5481190A (en) * 1991-07-19 1996-01-02 Kabushiki Kaisha Toshiba MRI auto power control method and system
EP0695947B1 (de) * 1994-08-03 2001-11-14 Philips Patentverwaltung GmbH MR-Verfahren zur Bestimmung der Kernmagnetisierungsverteilung mit einer Oberflächenspulen-Anordnung
US5551431A (en) * 1994-10-04 1996-09-03 The Brigham And Women's Hospital, Inc. Correction of magnetic resonance imager intensity inhomogeneities using tissue properties
US6025718A (en) * 1998-04-07 2000-02-15 Hushek; Stephen G. RF power calibration for an MRI system using local coils
JP2004503311A (ja) * 2000-06-15 2004-02-05 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ サブサンプリングを含む磁気共鳴画像処理方法
AU2001277234A1 (en) 2000-07-31 2002-02-13 Regents Of The University Of Minnesota Open TEM resonators for MRI
USRE44644E1 (en) 2000-12-21 2013-12-17 University Of Virginia Patent Foundation Method and apparatus for spin-echo-train MR imaging using prescribed signal evolutions
USRE45725E1 (en) 2000-12-21 2015-10-06 University Of Virginia Patent Foundation Method and apparatus for spin-echo-train MR imaging using prescribed signal evolutions
US6552538B2 (en) * 2001-04-11 2003-04-22 Koninklijke Philips Electronics, N.V. RF transmit calibration for open MRI systems
DE10147941B4 (de) * 2001-09-28 2005-01-05 Siemens Ag Verfahren zur Magnetresonanz-Bildgebung bei schwankender Sendefeldstärke
KR20040103981A (ko) * 2002-04-19 2004-12-09 리전츠 오브 더 유니버스티 오브 미네소타 무선 주파수 그래디언트 및 보정 코일
JP4006356B2 (ja) * 2003-04-28 2007-11-14 日本電子株式会社 Ｎｍｒ測定条件の最適化方法
DE10338075B4 (de) * 2003-08-19 2008-05-15 Siemens Ag Verfahren zur ortsaufgelösten Messung der B1-Feldverteilung bei MR-Messungen
WO2005022184A1 (en) * 2003-08-27 2005-03-10 Koninklijke Philips Electronics N.V. Determination of spatial sensitivity profiles of rf coils in magnetic resonance imaging
EP1665159A2 (en) * 2003-09-04 2006-06-07 Koninklijke Philips Electronics N.V. Adaptive image homogeneity correction for high field magnetic resonance imaging
US20050264291A1 (en) 2004-05-07 2005-12-01 Vaughan J T Multi-current elements for magnetic resonance radio frequency coils
JP4785566B2 (ja) * 2006-03-08 2011-10-05 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と磁気共鳴イメージング方法
US7446526B2 (en) * 2006-12-21 2008-11-04 The Board Of Trustees Of The Leland Stanford Junior University RF field mapping for magnetic resonance imaging
US8076939B2 (en) * 2008-04-10 2011-12-13 The General Hospital Corporation Method for fast magnetic resonance radiofrequency coil transmission profile mapping
DE102009004448B4 (de) * 2009-01-13 2012-05-24 Siemens Aktiengesellschaft Spulenpositionserkennung
JP5575454B2 (ja) * 2009-10-29 2014-08-20 株式会社東芝 磁気共鳴イメージング装置
US8810242B2 (en) 2010-08-06 2014-08-19 Kabushiki Kaisha Toshiba Spatial intensity correction for RF shading non-uniformities in MRI
US8217652B2 (en) 2010-08-06 2012-07-10 Kabushiki Kaisha Toshiba Spatial intensity correction for RF shading non-uniformities in MRI
US8686728B2 (en) * 2011-07-21 2014-04-01 Siemens Medical Solutions Usa, Inc. System for adapting an RF transmission magnetic field for image acquisition
US9228431B2 (en) 2012-10-04 2016-01-05 Halliburton Energy Services, Inc Frequency location apparatus, methods, and systems
JP2016526459A (ja) * 2013-07-11 2016-09-05 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． コイル感度を用いた補正磁気共鳴画像法
DE102014201475B4 (de) * 2014-01-28 2015-11-12 Siemens Aktiengesellschaft Verbesserte MR-Bildgebung durch Mittelung der Daten aus Anregungen mit wenigstens zwei unterschiedlichen Polarisationen
WO2016183572A1 (en) 2015-05-14 2016-11-17 Ohio State Innovation Foundation Systems and methods for estimating complex b1+ fields of transmit coils of a magnetic resonance imaging (mri) system
JP2017056045A (ja) * 2015-09-17 2017-03-23 株式会社日立製作所 磁気共鳴イメージング装置およびその制御方法
JP6611597B2 (ja) * 2015-12-24 2019-11-27 キヤノン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及びｒｆコイル装置
WO2018136705A1 (en) 2017-01-19 2018-07-26 Ohio State Innovation Foundation Estimating absolute phase of radio frequency fields of transmit and receive coils in a magnetic resonance
DE102017207267A1 (de) * 2017-04-28 2018-10-31 Siemens Healthcare Gmbh Verfahren zum Erzeugen eines ortsaufgelösten Magnetresonanzdatensatzes, Datenträger sowie Magnetresonanzanlage
CN109765513B (zh) * 2019-02-12 2021-05-18 上海联影医疗科技股份有限公司 用于产生磁共振场图的方法、装置及计算机设备

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Publication number Priority date Publication date Assignee Title
US4616183A (en) * 1984-10-22 1986-10-07 General Electric Company Method for reducing baseline error components in NMR signals
JPS61191949A (ja) * 1985-02-19 1986-08-26 Toshiba Corp 磁気共鳴イメ−ジング装置
JPS61194338A (ja) * 1985-02-25 1986-08-28 Yokogawa Electric Corp 核磁気共鳴撮像装置の位相およびシエ−デイング補正方法
JPS628747A (ja) * 1985-07-04 1987-01-16 株式会社東芝 磁気共鳴映像装置
FR2598509B1 (fr) * 1986-05-06 1989-03-31 Thomson Cgr Procede de calibration de l'amplitude de l'excitation radiofrequence d'un appareil d'imagerie par resonance magnetique nucleaire
NL8602821A (nl) * 1986-11-07 1988-06-01 Philips Nv Werkwijze en inrichting voor het bepalen van gecorrigeerd mri oppervlaktespoelbeeld.

Also Published As

Publication number Publication date
EP0414474A3 (en) 1991-08-28
JPH0616765B2 (ja) 1994-03-09
EP0414474A2 (en) 1991-02-27
IL95294A0 (en) 1991-06-30
JPH03139330A (ja) 1991-06-13
US5001428A (en) 1991-03-19

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Legal Events

Date Code Title Description
FD Application lapsed
MM Patent lapsed

Owner name: GENERAL ELECTRIC COMPANY