CN115461639A - 具有t1补偿的b1映射的mr成像 - Google Patents

具有t1补偿的b1映射的mr成像 Download PDF

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Publication number
CN115461639A
CN115461639A CN202180030191.4A CN202180030191A CN115461639A CN 115461639 A CN115461639 A CN 115461639A CN 202180030191 A CN202180030191 A CN 202180030191A CN 115461639 A CN115461639 A CN 115461639A
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CN
China
Prior art keywords
fid
stimulated echo
signals
ste
preparation
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Pending
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CN202180030191.4A
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English (en)
Chinese (zh)
Inventor
K·内尔克
P·博尔纳特
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Koninklijke Philips NV
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Koninklijke Philips NV
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Publication of CN115461639A publication Critical patent/CN115461639A/zh
Pending legal-status Critical Current

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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
    • G01R33/24—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
    • G01R33/50—NMR imaging systems based on the determination of relaxation times, e.g. T1 measurement by IR sequences; T2 measurement by multiple-echo sequences
    • 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
    • G01R33/5602—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by filtering or weighting based on different relaxation times within the sample, e.g. T1 weighting using an inversion pulse
    • 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
    • G01R33/5615—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE]
    • G01R33/5617—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE] using RF refocusing, e.g. RARE

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (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)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
CN202180030191.4A 2020-04-23 2021-04-20 具有t1补偿的b1映射的mr成像 Pending CN115461639A (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20171014.2A EP3901647A1 (en) 2020-04-23 2020-04-23 Mr imaging with t1 compensated b1 mapping
EP20171014.2 2020-04-23
PCT/EP2021/060142 WO2021214003A1 (en) 2020-04-23 2021-04-20 Mr imaging with t1 compensated b1 mapping

Publications (1)

Publication Number Publication Date
CN115461639A true CN115461639A (zh) 2022-12-09

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Family Applications (1)

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CN202180030191.4A Pending CN115461639A (zh) 2020-04-23 2021-04-20 具有t1补偿的b1映射的mr成像

Country Status (5)

Country Link
US (1) US12405325B2 (https=)
EP (2) EP3901647A1 (https=)
JP (1) JP7320145B2 (https=)
CN (1) CN115461639A (https=)
WO (1) WO2021214003A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121049814A (zh) * 2025-10-31 2025-12-02 安徽福晴医疗装备有限公司 校准射频功率获取方法和系统及其射频功率-翻转角映射函数建立方法和系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104081219A (zh) * 2012-01-12 2014-10-01 皇家飞利浦有限公司 具有b1映射的mr成像
WO2018050777A1 (en) * 2016-09-14 2018-03-22 Institut National De La Sante Et De La Recherche Medicale (Inserm) A method for characterizing the radio-frequency transmit field in nmr

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004053777B4 (de) * 2003-11-19 2010-09-02 Siemens Ag Verfahren zum Bestimmen eines Einstellparameters einer Hochfrequenzsendeanordnung für eine Magnetresonanzanlage
US8143889B2 (en) * 2009-02-24 2012-03-27 University Of Utah Research Foundation Simultaneous acquisitions of spin- and stimulated-echo planar imaging
US8077955B2 (en) * 2009-03-19 2011-12-13 Kabushiki Kaisha Toshiba B1 mapping in MRI system using k-space spatial frequency domain filtering
WO2011155461A1 (ja) * 2010-06-09 2011-12-15 株式会社 日立メディコ 磁気共鳴イメージング装置および送信感度分布算出方法
DE102013201670B3 (de) * 2013-02-01 2014-07-03 Siemens Aktiengesellschaft Verfahren zum Erfassen von MR-Daten und zur Bestimmung eines B1-Magnetfelds sowie entsprechend ausgestaltete Magnetresonanzanlage
DE102013201671B3 (de) * 2013-02-01 2014-07-31 Siemens Aktiengesellschaft Verfahren zum Erfassen von MR-Daten und zur Bestimmung eines B1-Magnetfelds sowie entsprechend ausgestaltete Magnetresonanzanlage
US10156625B2 (en) * 2013-08-12 2018-12-18 Koninklijke Philips N.V. MR imaging with B1 mapping

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104081219A (zh) * 2012-01-12 2014-10-01 皇家飞利浦有限公司 具有b1映射的mr成像
WO2018050777A1 (en) * 2016-09-14 2018-03-22 Institut National De La Sante Et De La Recherche Medicale (Inserm) A method for characterizing the radio-frequency transmit field in nmr

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王雷 等: "一种在永磁MRI系统上利用混合PRF/T_1的改进测温方法", 中国生物医学工程学报, no. 02, 20 April 2013 (2013-04-20), pages 36 - 43 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121049814A (zh) * 2025-10-31 2025-12-02 安徽福晴医疗装备有限公司 校准射频功率获取方法和系统及其射频功率-翻转角映射函数建立方法和系统

Also Published As

Publication number Publication date
EP4139699A1 (en) 2023-03-01
US20230145981A1 (en) 2023-05-11
JP2023515262A (ja) 2023-04-12
JP7320145B2 (ja) 2023-08-02
EP3901647A1 (en) 2021-10-27
EP4139699B1 (en) 2023-12-06
WO2021214003A1 (en) 2021-10-28
US12405325B2 (en) 2025-09-02

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