JP7320145B2 - Ｔ１補償ｂ１マッピングによる磁気共鳴撮像 - Google Patents

Ｔ１補償ｂ１マッピングによる磁気共鳴撮像 Download PDF

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JP7320145B2
JP7320145B2 JP2022563884A JP2022563884A JP7320145B2 JP 7320145 B2 JP7320145 B2 JP 7320145B2 JP 2022563884 A JP2022563884 A JP 2022563884A JP 2022563884 A JP2022563884 A JP 2022563884A JP 7320145 B2 JP7320145 B2 JP 7320145B2
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excitation
echo
signals
pulses
fid
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JP2023515262A5 (https=
JP2023515262A (ja
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ケイ ネールク
ペーター ブールネルト
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Koninklijke Philips NV
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Koninklijke Philips 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
    • G01R33/24—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)
JP2022563884A 2020-04-23 2021-04-20 Ｔ１補償ｂ１マッピングによる磁気共鳴撮像 Active JP7320145B2 (ja)

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 (3)

Publication Number Publication Date
JP2023515262A JP2023515262A (ja) 2023-04-12
JP2023515262A5 JP2023515262A5 (https=) 2023-05-25
JP7320145B2 true JP7320145B2 (ja) 2023-08-02

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JP2022563884A Active JP7320145B2 (ja) 2020-04-23 2021-04-20 Ｔ１補償ｂ１マッピングによる磁気共鳴撮像

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121049814B (zh) * 2025-10-31 2026-01-27 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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050140369A1 (en) 2003-11-19 2005-06-30 Thorsten Feiweier RF transmitter arrangement for an MR system, and method for determining a setting parameter therefor
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
US20140218022A1 (en) 2013-02-01 2014-08-07 Michael Koehler Magnetic resonance system and method to acquire mr data and to determine a b1 magnetic field
JP2015503432A (ja) 2012-01-12 2015-02-02 コーニンクレッカ フィリップス エヌ ヴェ Ｂ１マッピングのあるｍｒ撮像

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
US10156625B2 (en) * 2013-08-12 2018-12-18 Koninklijke Philips N.V. MR imaging with B1 mapping
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050140369A1 (en) 2003-11-19 2005-06-30 Thorsten Feiweier RF transmitter arrangement for an MR system, and method for determining a setting parameter therefor
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
JP2015503432A (ja) 2012-01-12 2015-02-02 コーニンクレッカ フィリップス エヌ ヴェ Ｂ１マッピングのあるｍｒ撮像
US20140218022A1 (en) 2013-02-01 2014-08-07 Michael Koehler Magnetic resonance system and method to acquire mr data and to determine a b1 magnetic field

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Kay Nehrke and Peter Bornert，DREAM-A Novel Approach for Robust Ultrafast,Multislice B1 Mapping，Magnetic Resonance in Medicine，2012年01月17日，Vol.68, Issue 5，pp. 1517-1526
Lae Hoon Kang, Dong Eun Kim, and Soo Yeol Lee，Fast B1 mapping based on interleaved-three-flip-angle (ITFA) excitation，Med. Phys.，2013年11月，Vol. 40, Issue 11，112301

Also Published As

Publication number Publication date
EP4139699A1 (en) 2023-03-01
US20230145981A1 (en) 2023-05-11
JP2023515262A (ja) 2023-04-12
EP3901647A1 (en) 2021-10-27
CN115461639A (zh) 2022-12-09
EP4139699B1 (en) 2023-12-06
WO2021214003A1 (en) 2021-10-28
US12405325B2 (en) 2025-09-02

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