CN101487881B - 用于线圈阵列的特殊吸收率优化控制的控制方法 - Google Patents

用于线圈阵列的特殊吸收率优化控制的控制方法 Download PDF

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Publication number
CN101487881B
CN101487881B CN200910001871.4A CN200910001871A CN101487881B CN 101487881 B CN101487881 B CN 101487881B CN 200910001871 A CN200910001871 A CN 200910001871A CN 101487881 B CN101487881 B CN 101487881B
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pulse
excitation
inhomogeneity
control device
control method
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Chinese (zh)
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CN101487881A (zh
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德克·迪尔
于尔根·尼斯特勒
沃尔夫冈·伦兹
马库斯·维斯特
塞巴斯蒂安·沃尔夫
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Siemens Medical Ag
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Siemens Corp
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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
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
    • G01R33/3415—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils comprising arrays of sub-coils, i.e. phased-array coils with flexible receiver channels
    • 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
    • G01R33/5611—Parallel magnetic resonance imaging, e.g. sensitivity encoding [SENSE], simultaneous acquisition of spatial harmonics [SMASH], unaliasing by Fourier encoding of the overlaps using the temporal dimension [UNFOLD], k-t-broad-use linear acquisition speed-up technique [k-t-BLAST], k-t-SENSE
    • G01R33/5612—Parallel RF transmission, i.e. RF pulse transmission using a plurality of independent transmission channels
    • 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
    • G01R33/5659—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of the RF magnetic field, e.g. spatial inhomogeneities of the RF magnetic field
    • 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
    • G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General 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)
  • Magnetic Resonance Imaging Apparatus (AREA)
CN200910001871.4A 2008-01-14 2009-01-14 用于线圈阵列的特殊吸收率优化控制的控制方法 Active CN101487881B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008004256.0 2008-01-14
DE102008004256A DE102008004256B4 (de) 2008-01-14 2008-01-14 SAR-optimierte Ansteuerung eines Spulenarrays

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CN101487881A CN101487881A (zh) 2009-07-22
CN101487881B true CN101487881B (zh) 2013-01-09

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US (1) US7847550B2 (enExample)
JP (1) JP5419476B2 (enExample)
CN (1) CN101487881B (enExample)
DE (1) DE102008004256B4 (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009057582B4 (de) * 2009-12-09 2012-07-26 Siemens Aktiengesellschaft Verfahren zum Aufbau von zumindest einem Teilbereich einer Pulssequenz einer Magnetresonanzvorrichtung und entsprechende Pulssequenz
CN101852843B (zh) * 2010-05-27 2014-07-30 南京丰盛超导技术有限公司 一种超导磁体外磁屏蔽线圈的优化设计方法
DE102012212402B3 (de) * 2012-03-20 2013-10-17 Siemens Aktiengesellschaft Ermittlung einer MR-Sequenz unter Berücksichtigung der Energieverteilungsfunktion im k-Raum
DE102014209783B4 (de) * 2014-05-22 2018-06-14 Siemens Healthcare Gmbh Erstellung eines MR-Bildes mit Hilfe einer Kombination aus einer Ganzkörperspule und einer lokalen Sendespule
CN106353705B (zh) * 2016-09-23 2019-02-05 沈阳东软医疗系统有限公司 一种梯度信号输出的方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1263601A (zh) * 1998-04-17 2000-08-16 皇家菲利浦电子有限公司 磁共振成象方法和装置
US6177795B1 (en) * 1998-05-19 2001-01-23 Elscint Ltd. Spectral component imaging using phased array coils
US6819108B2 (en) * 2003-03-21 2004-11-16 General Electric Company Method of magnetic field controlled shimming
CN1886670A (zh) * 2003-11-25 2006-12-27 皇家飞利浦电子股份有限公司 带有嵌入电子模块的磁共振线圈元件

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647858A (en) * 1985-07-29 1987-03-03 General Electric Company Methods for overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging
JPH03224538A (ja) * 1990-01-31 1991-10-03 Hitachi Medical Corp 一次の静磁場不均一を補正して計測する過程を備えたｍｒｉ装置
US5914599A (en) * 1995-08-18 1999-06-22 National Research Council Of Canada Compensation for inhomogeneity of the field generated by the RF coil in a nuclear magnetic resonance system
US6989673B2 (en) 2003-11-26 2006-01-24 General Electric Company Method and apparatus to reduce RF power deposition during MR data acquisition
US7078900B2 (en) * 2004-07-23 2006-07-18 General Electric Company Method and system of determining parameters for MR data acquisition with real-time B1 optimization
US7479783B2 (en) * 2006-11-15 2009-01-20 Beth Israel Deaconess Medical Center, Inc. Echo train preparation for fast spin-echo acquisition
US7737690B2 (en) * 2007-05-18 2010-06-15 General Electric Company System and method for amplitude reduction in RF pulse design
JP5184049B2 (ja) * 2007-10-30 2013-04-17 株式会社日立製作所 磁気共鳴検査装置及び高周波パルス波形算出方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1263601A (zh) * 1998-04-17 2000-08-16 皇家菲利浦电子有限公司 磁共振成象方法和装置
US6177795B1 (en) * 1998-05-19 2001-01-23 Elscint Ltd. Spectral component imaging using phased array coils
US6819108B2 (en) * 2003-03-21 2004-11-16 General Electric Company Method of magnetic field controlled shimming
CN1886670A (zh) * 2003-11-25 2006-12-27 皇家飞利浦电子股份有限公司 带有嵌入电子模块的磁共振线圈元件

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Publication number Publication date
JP5419476B2 (ja) 2014-02-19
CN101487881A (zh) 2009-07-22
DE102008004256A1 (de) 2009-07-23
US7847550B2 (en) 2010-12-07
DE102008004256B4 (de) 2010-01-07
JP2009165834A (ja) 2009-07-30
US20090179645A1 (en) 2009-07-16

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