JP4358834B2 - 磁気共鳴イメージングシステム - Google Patents

磁気共鳴イメージングシステム Download PDF

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Publication number
JP4358834B2
JP4358834B2 JP2006091445A JP2006091445A JP4358834B2 JP 4358834 B2 JP4358834 B2 JP 4358834B2 JP 2006091445 A JP2006091445 A JP 2006091445A JP 2006091445 A JP2006091445 A JP 2006091445A JP 4358834 B2 JP4358834 B2 JP 4358834B2
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JP
Japan
Prior art keywords
magnetic field
ssfp
data
space
phase
Prior art date
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JP2006091445A
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English (en)
Japanese (ja)
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JP2006280930A (ja
JP2006280930A5 (enExample
Inventor
ウェイグォ・ジャン
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba America MRI Inc
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Toshiba America MRI Inc
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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
    • G01R33/44—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
    • G01R33/56563—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of the main magnetic field B0, e.g. temporal variation of the magnitude or spatial inhomogeneity of B0
    • 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
    • G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
    • G01R33/5613—Generating steady state signals, e.g. low flip angle sequences [FLASH]

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  • 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)
JP2006091445A 2005-04-01 2006-03-29 磁気共鳴イメージングシステム Expired - Fee Related JP4358834B2 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/095,520 US7116105B1 (en) 2005-04-01 2005-04-01 Magnetic field mapping during SSFP using phase-incremented or frequency-shifted magnitude images

Publications (3)

Publication Number Publication Date
JP2006280930A JP2006280930A (ja) 2006-10-19
JP2006280930A5 JP2006280930A5 (enExample) 2009-07-23
JP4358834B2 true JP4358834B2 (ja) 2009-11-04

Family

ID=37037283

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006091445A Expired - Fee Related JP4358834B2 (ja) 2005-04-01 2006-03-29 磁気共鳴イメージングシステム

Country Status (2)

Country Link
US (1) US7116105B1 (enExample)
JP (1) JP4358834B2 (enExample)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7587231B2 (en) * 2004-01-09 2009-09-08 Toshiba America Mri, Inc. Water fat separated magnetic resonance imaging method and system using steady-state free-precession
JP4597857B2 (ja) * 2005-12-26 2010-12-15 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 Ｒｆパルス印加方法およびｍｒｉ装置
US7560925B1 (en) * 2008-05-01 2009-07-14 The Board Of Trustees Of The Leland Stanford Junior University Multiple repetition time steady-state free precession imaging
US20100019766A1 (en) * 2008-07-28 2010-01-28 Siemens Medical Solutions Usa, Inc. System for Dynamically Compensating for Inhomogeneity in an MR Imaging Device Magnetic Field
US7952353B2 (en) * 2009-05-06 2011-05-31 The Board Of Trustees Of The Leland Stanford Junior University Method and apparatus for field map estimation
CN102949189B (zh) * 2011-08-31 2015-03-18 上海联影医疗科技有限公司 一种磁共振成像中用多通道数据组合实现水脂分离的方法
US10089729B2 (en) * 2014-04-23 2018-10-02 Toshiba Medical Systems Corporation Merging magnetic resonance (MR) magnitude and phase images
US10234521B2 (en) * 2014-04-24 2019-03-19 Junmin LIU Systems and methods for field mapping in magnetic resonance imaging
CA2967337C (en) * 2014-11-11 2022-05-10 Hyperfine Research, Inc. Pulse sequences for low field magnetic resonance
KR101699528B1 (ko) 2015-06-30 2017-01-24 삼성전자 주식회사 자기 공명 영상 장치 및 자기 공명 영상의 생성 방법
CN105662412B (zh) * 2015-12-29 2019-09-10 东软医疗系统股份有限公司 一种磁共振系统的一阶匀场方法、装置及设备
WO2018071754A1 (en) * 2016-10-13 2018-04-19 Regents Of The University Of Minnesota Systems and methods for steady-state echo magnetic resonance imaging
US11054638B2 (en) 2018-06-13 2021-07-06 Reavire, Inc. Tracking pointing direction of device
TW202012951A (zh) 2018-07-31 2020-04-01 美商超精細研究股份有限公司 低場漫射加權成像
EP3617731A1 (en) 2018-08-29 2020-03-04 Erasmus University Medical Center Rotterdam Magnetic resonance imaging based on transient response signals
US11510588B2 (en) 2019-11-27 2022-11-29 Hyperfine Operations, Inc. Techniques for noise suppression in an environment of a magnetic resonance imaging system
EP3926355A1 (en) * 2020-06-15 2021-12-22 Koninklijke Philips N.V. Estimation of b0 inhomogeneities for improved acquisition and/or reconstruction of magnetic resonance images

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5909119A (en) 1995-08-18 1999-06-01 Toshiba America Mri, Inc. Method and apparatus for providing separate fat and water MRI images in a single acquisition scan
US6275038B1 (en) * 1999-03-10 2001-08-14 Paul R. Harvey Real time magnetic field mapping using MRI
US6307368B1 (en) * 1999-05-14 2001-10-23 Board Of Trustees Of The Leland Stanford Junior University Linear combination steady-state free precession MRI
JP5002099B2 (ja) 2001-08-31 2012-08-15 株式会社東芝 磁気共鳴イメージング装置
JP4049649B2 (ja) 2002-10-01 2008-02-20 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 磁気共鳴撮影装置
US6856134B1 (en) * 2003-05-23 2005-02-15 The Board Of Trustees Of The Leland Stanford Junior University Magnetic resonance imaging with fat-water signal separation
US6906516B2 (en) 2003-08-05 2005-06-14 The Board Of Trustees Of The Leland Stanford Junior University Artifact reduction in SSFP MRI using weighted sum of combined signals

Also Published As

Publication number Publication date
US7116105B1 (en) 2006-10-03
JP2006280930A (ja) 2006-10-19
US20060220645A1 (en) 2006-10-05

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