JP6532657B2 - Ｍｒｉ装置 - Google Patents

Ｍｒｉ装置 Download PDF

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Publication number
JP6532657B2
JP6532657B2 JP2014156067A JP2014156067A JP6532657B2 JP 6532657 B2 JP6532657 B2 JP 6532657B2 JP 2014156067 A JP2014156067 A JP 2014156067A JP 2014156067 A JP2014156067 A JP 2014156067A JP 6532657 B2 JP6532657 B2 JP 6532657B2
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Japan
Prior art keywords
pulse
correction value
value
output value
unit
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JP2014156067A
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English (en)
Japanese (ja)
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JP2016032528A5 (enExample
JP2016032528A (ja
Inventor
正昭 山中
正昭 山中
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.)
Canon Medical Systems Corp
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Canon Medical Systems Corp
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Application filed by Canon Medical Systems Corp filed Critical Canon Medical Systems Corp
Priority to JP2014156067A priority Critical patent/JP6532657B2/ja
Priority to US14/793,964 priority patent/US10353042B2/en
Publication of JP2016032528A publication Critical patent/JP2016032528A/ja
Publication of JP2016032528A5 publication Critical patent/JP2016032528A5/ja
Application granted granted Critical
Publication of JP6532657B2 publication Critical patent/JP6532657B2/ja
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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
    • G01R33/5659—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
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3614—RF power amplifiers
    • 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
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3621—NMR receivers or demodulators, e.g. preamplifiers, means for frequency modulation of the MR signal using a digital down converter, means for analog to digital conversion [ADC] or for filtering or processing of the MR signal such as bandpass filtering, resampling, decimation or interpolation
    • 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
    • G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
    • G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency

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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)
JP2014156067A 2014-07-31 2014-07-31 Ｍｒｉ装置 Active JP6532657B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2014156067A JP6532657B2 (ja) 2014-07-31 2014-07-31 Ｍｒｉ装置
US14/793,964 US10353042B2 (en) 2014-07-31 2015-07-08 MRI apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014156067A JP6532657B2 (ja) 2014-07-31 2014-07-31 Ｍｒｉ装置

Publications (3)

Publication Number Publication Date
JP2016032528A JP2016032528A (ja) 2016-03-10
JP2016032528A5 JP2016032528A5 (enExample) 2017-08-03
JP6532657B2 true JP6532657B2 (ja) 2019-06-19

Family

ID=55179800

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014156067A Active JP6532657B2 (ja) 2014-07-31 2014-07-31 Ｍｒｉ装置

Country Status (2)

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US (1) US10353042B2 (enExample)
JP (1) JP6532657B2 (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6688638B2 (ja) * 2016-03-10 2020-04-28 キヤノンメディカルシステムズ株式会社 磁気共鳴イメージング装置
CN112285620B (zh) * 2019-07-24 2024-09-06 通用电气精准医疗有限责任公司 Rf发射系统和方法、mri系统及其预扫描方法以及存储介质

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739268A (en) * 1987-01-21 1988-04-19 Kabushiki Kaisha Toshiba RF pulse control system for a magnetic resonance imaging transmitter
JP3142613B2 (ja) * 1991-10-14 2001-03-07 ジーイー横河メディカルシステム株式会社 Ｍｒ装置におけるｒｆ駆動回路
JPH06319716A (ja) 1993-05-14 1994-11-22 Toshiba Corp Ｍｒｉ装置
JPH11290288A (ja) 1998-04-09 1999-10-26 Toshiba Corp 磁気共鳴診断装置
JP2006153461A (ja) * 2004-11-25 2006-06-15 Hitachi Ltd 核磁気共鳴計測装置
US20100141257A1 (en) * 2007-05-04 2010-06-10 Koninklijke Philips Electronics N.V. Rf transmitter with digital feedback for mri
JP5122864B2 (ja) * 2007-05-21 2013-01-16 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コイル駆動回路およびｍｒｉ装置
JP5535489B2 (ja) * 2009-01-30 2014-07-02 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 磁気共鳴イメージング装置
JP5542591B2 (ja) * 2009-11-12 2014-07-09 株式会社東芝 磁気共鳴イメージング装置、および、磁気共鳴イメージング方法
JP6042148B2 (ja) * 2011-11-22 2016-12-14 東芝メディカルシステムズ株式会社 磁気共鳴イメージング装置

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Publication number Publication date
JP2016032528A (ja) 2016-03-10
US20160033609A1 (en) 2016-02-04
US10353042B2 (en) 2019-07-16

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