CN103261906B - 无源b1场匀场 - Google Patents

无源b1场匀场 Download PDF

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Publication number
CN103261906B
CN103261906B CN201180060494.7A CN201180060494A CN103261906B CN 103261906 B CN103261906 B CN 103261906B CN 201180060494 A CN201180060494 A CN 201180060494A CN 103261906 B CN103261906 B CN 103261906B
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CN
China
Prior art keywords
dielectric
coil
field
excitation field
shimming
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CN201180060494.7A
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English (en)
Chinese (zh)
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CN103261906A (zh
Inventor
Z·翟
M·A·莫里希
P·R·哈维
M·富德勒
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Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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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
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/387—Compensation of inhomogeneities
    • G01R33/3873—Compensation of inhomogeneities using ferromagnetic bodies ; Passive shimming
    • 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
    • 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
    • G01R33/543—Control of the operation of the MR system, e.g. setting of acquisition parameters prior to or during MR data acquisition, dynamic shimming, use of one or more scout images for scan plane prescription
    • 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
    • G01R33/24—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
    • G01R33/28—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
    • G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
    • G01R33/34076—Birdcage coils

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
CN201180060494.7A 2010-12-16 2011-12-05 无源b1场匀场 Active CN103261906B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US42362410P 2010-12-16 2010-12-16
US61/423,624 2010-12-16
PCT/IB2011/055450 WO2012080898A1 (en) 2010-12-16 2011-12-05 Passive b1 field shimming

Publications (2)

Publication Number Publication Date
CN103261906A CN103261906A (zh) 2013-08-21
CN103261906B true CN103261906B (zh) 2016-03-16

Family

ID=45443136

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201180060494.7A Active CN103261906B (zh) 2010-12-16 2011-12-05 无源b1场匀场

Country Status (7)

Country Link
US (1) US9689941B2 (enExample)
EP (1) EP2652516B1 (enExample)
JP (1) JP6085567B2 (enExample)
CN (1) CN103261906B (enExample)
BR (1) BR112013014672A2 (enExample)
RU (1) RU2577172C2 (enExample)
WO (1) WO2012080898A1 (enExample)

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US8686728B2 (en) * 2011-07-21 2014-04-01 Siemens Medical Solutions Usa, Inc. System for adapting an RF transmission magnetic field for image acquisition
US9297867B2 (en) * 2012-01-05 2016-03-29 General Electric Company Radio frequncy (RF) body coil and method for tuning an RF body coil for magnetic resonance imaging
JP6108953B2 (ja) * 2012-06-15 2017-04-05 キヤノン株式会社 医療用装置
DE102013009630A1 (de) 2013-06-10 2014-12-11 Forschungszentrum Jülich GmbH Verfahren zur Homogenisierung eines B1-Sendefeldes
DE102013213538B4 (de) * 2013-07-10 2018-08-16 Siemens Healthcare Gmbh Patienten-Bore mit integrierter HF-Rückflussraumformung zur Minimierung der Kopplung zwischen einer Energiekette und lokalen HF-Sendespulen
GB2524494A (en) * 2014-03-24 2015-09-30 Siemens Plc Shimming device for a magnetic resonance imaging apparatus with enhanced cooling and method for providing such a device
EP3145402A4 (en) * 2014-05-20 2018-03-07 The Medical College of Wisconsin, Inc. System and method for fabricating electromagnetic field enhancing objects for magnetic resonance imaging
EP3428673A1 (en) * 2017-07-13 2019-01-16 Koninklijke Philips N.V. Passive rf shim resonator for field homogenization of an rf antenna device for tx mode and rx mode
WO2019071091A1 (en) * 2017-10-06 2019-04-11 Advanced Imaging Research, Inc. Optimized infant mri system with cryocooled rf coil
WO2019126936A1 (zh) * 2017-12-25 2019-07-04 深圳先进技术研究院 一种用于磁共振成像的高介电常数衬垫新型结构
CN109953759A (zh) * 2017-12-26 2019-07-02 深圳先进技术研究院 一种胎儿磁共振成像方法及其装置
EP3511727A1 (en) * 2018-01-11 2019-07-17 Koninklijke Philips N.V. Active b1+ shimming of transmission coils
US12191082B2 (en) 2020-06-29 2025-01-07 HyQ Research Solutions, LLC Matrix assembly having solid dielectric elements and a tailored bulk dielectric constant and method of manufacturing same
CN112816923B (zh) * 2020-12-29 2023-07-28 深圳市联影高端医疗装备创新研究院 一种超高场发射匀场线圈结构
NL2031618B1 (en) * 2022-04-19 2023-11-06 Univ Delft Tech Shim for mitigating effects of field inhomogeneities in magnetic resonance imaging and method thereof

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CN1875286A (zh) * 2003-10-31 2006-12-06 皇家飞利浦电子股份有限公司 磁共振成像中的b1场控制

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CN1875286A (zh) * 2003-10-31 2006-12-06 皇家飞利浦电子股份有限公司 磁共振成像中的b1场控制

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Also Published As

Publication number Publication date
RU2577172C2 (ru) 2016-03-10
JP6085567B2 (ja) 2017-02-22
US20130278262A1 (en) 2013-10-24
EP2652516B1 (en) 2019-11-27
US9689941B2 (en) 2017-06-27
BR112013014672A2 (pt) 2016-09-27
EP2652516A1 (en) 2013-10-23
RU2013132722A (ru) 2015-01-27
WO2012080898A1 (en) 2012-06-21
CN103261906A (zh) 2013-08-21
JP2013545573A (ja) 2013-12-26

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