JP2017213384A - 磁気共鳴イメージング装置および送信制御方法 - Google Patents
磁気共鳴イメージング装置および送信制御方法 Download PDFInfo
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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
- G01R33/543—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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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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
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
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- G—PHYSICS
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- 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
- G01R33/3607—RF waveform generators, e.g. frequency generators, amplitude-, frequency- or phase modulators or shifters, pulse programmers, digital to analog converters for the RF signal, means for filtering or attenuating of the RF signal
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- A—HUMAN NECESSITIES
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- A61B5/0033—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room
- A61B5/0037—Performing a preliminary scan, e.g. a prescan for identifying a region of interest
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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
- G01R33/561—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
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Abstract
【解決手段】磁気共鳴イメージング装置は、送信コイルから発生させられた高周波磁場を、デカップリングした状態で受信する受信コイル16と、デカップリングした状態における受信コイルからの出力に基づいて、高周波磁場の位相と振幅のうち少なくとも1つを測定する測定部と、を備える。
【選択図】図2
Description
13 送信部
14 受信部
15 シーケンス制御部
16 受信コイル
31 振幅位相制御部
33 送信パルス生成部
34 管理部
41 MR信号処理部
42 検波用信号生成部
44 振幅位相測定部
130 RFコイル
141 寝台装置
161a、162a フェーズドアレイコイル
161b、162b コイル要素
200 計算機システム
Claims (6)
- 送信コイルから発生させられた高周波磁場を、デカップリングした状態で受信する受信コイルと、
デカップリングした状態における前記受信コイルからの出力に基づいて、前記高周波磁場の位相と振幅のうち少なくとも1つを測定する測定部と、
を備えた磁気共鳴イメージング装置。 - 前記受信コイルは、前記送信コイルへのRFパルスの入力と同時に前記高周波磁場の受信を行う、
請求項1記載の磁気共鳴イメージング装置。 - 前記測定部により測定された前記位相と前記振幅のうちの少なくとも1つに基づいて、前記送信コイルに供給されるRFパルスの位相と振幅のうち少なくとも1つを制御する制御部をさらに備えた、
請求項1または2に記載の磁気共鳴イメージング装置。 - 前記制御部は、前記送信コイルが高周波磁場を発生してから所定の時間経過後に、前記受信コイルが被検体からのMR信号を受信する際に、前記受信コイルをカップリングした状態にする、
請求項3記載の磁気共鳴イメージング装置。 - 送信コイルから発生させられた高周波磁場を受信コイルがデカップリングした状態で受信するステップと、
デカップリングした状態における前記受信コイルからの出力に基づいて、前記高周波磁場の位相と振幅のうち少なくとも1つを測定するステップと、
を含む送信制御方法。 - 測定された前記高周波磁場の位相と振幅のうちの少なくとも1つに基づいて、前記送信コイルに供給されるRFパルスの位相と振幅のうち少なくとも1つを制御するステップをさらに含む、
請求項5に記載の送信制御方法。
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KR20230116480A (ko) * | 2022-01-28 | 2023-08-04 | 가천대학교 산학협력단 | 다중 소동물 자기공명영상용 rf 코일 |
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CN103841887B (zh) * | 2012-09-25 | 2016-06-08 | 株式会社东芝 | 磁共振成像装置以及发送控制程序 |
DE102013206570B3 (de) | 2013-04-12 | 2014-05-22 | Siemens Aktiengesellschaft | Verfahren zum Betrieb einer zur unabhängigen Ansteuerung mehrerer Spulenelemente ausgebildeten Sendeeinrichtung einer Magnetresonanzeinrichtung und Sendeeinrichtung |
JP6212442B2 (ja) * | 2014-06-30 | 2017-10-11 | 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 | 磁気共鳴信号処理方法、磁気共鳴信号処理装置及び磁気共鳴装置並びにプログラム |
JP6618988B2 (ja) * | 2015-03-06 | 2019-12-11 | 株式会社日立製作所 | 磁気共鳴イメージング装置およびrfシミングパラメータの設定方法 |
CN107479014B (zh) * | 2016-06-03 | 2020-09-29 | 西门子(深圳)磁共振有限公司 | 磁共振线圈的选择方法和装置 |
JP7325940B2 (ja) | 2018-09-14 | 2023-08-15 | キヤノンメディカルシステムズ株式会社 | 高周波増幅装置および磁気共鳴イメージング装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62268542A (ja) * | 1986-05-15 | 1987-11-21 | 三菱電機株式会社 | 磁気共鳴装置 |
JPH0523315A (ja) * | 1991-07-17 | 1993-02-02 | Toshiba Corp | Rfプローブ |
JPH06254071A (ja) * | 1993-03-10 | 1994-09-13 | Toshiba Corp | 磁気共鳴映像装置及び磁気共鳴映像装置用プローブ |
JP2004526547A (ja) * | 2001-05-19 | 2004-09-02 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Mr装置用の送信及び受信コイル |
JP2012024306A (ja) * | 2010-07-22 | 2012-02-09 | Toshiba Corp | 磁気共鳴イメージング装置 |
US20120238861A1 (en) * | 2011-03-11 | 2012-09-20 | Matthias Gebhardt | Method and high-frequency check device for checking a high-frequency transmit device of a magnetic resonance tomography system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4685468A (en) | 1983-03-18 | 1987-08-11 | Albert Macovski | NMR imaging system using field compensation |
JP4739735B2 (ja) * | 2004-11-22 | 2011-08-03 | 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 | Mri装置 |
US7336074B2 (en) * | 2006-05-05 | 2008-02-26 | Quality Electrodynamics | Active decoupling of MRI RF transmit coils |
JP5670159B2 (ja) | 2009-11-26 | 2015-02-18 | 株式会社東芝 | 磁気共鳴イメージング装置 |
DE102010038775B4 (de) * | 2010-08-02 | 2012-10-31 | Siemens Aktiengesellschaft | Dynamische Phasenkorrektur bei einem Mehrkanal-HF-Sendemodul |
JP5868025B2 (ja) * | 2011-05-23 | 2016-02-24 | 株式会社東芝 | 磁気共鳴イメージング装置 |
WO2013008116A1 (en) * | 2011-07-04 | 2013-01-17 | Koninklijke Philips Electronics N.V. | Magnetic resonance imaging system with a multi-channel impedance matching network |
CN103841887B (zh) * | 2012-09-25 | 2016-06-08 | 株式会社东芝 | 磁共振成像装置以及发送控制程序 |
US9625541B2 (en) * | 2013-07-01 | 2017-04-18 | Siemens Aktiengesellschaft | Safety tests for systems monitoring local SAR |
DE102014223878B4 (de) * | 2014-11-24 | 2016-06-16 | Siemens Healthcare Gmbh | Phasenüberwachung für mehrkanalige MR-Sendesysteme |
-
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62268542A (ja) * | 1986-05-15 | 1987-11-21 | 三菱電機株式会社 | 磁気共鳴装置 |
JPH0523315A (ja) * | 1991-07-17 | 1993-02-02 | Toshiba Corp | Rfプローブ |
JPH06254071A (ja) * | 1993-03-10 | 1994-09-13 | Toshiba Corp | 磁気共鳴映像装置及び磁気共鳴映像装置用プローブ |
JP2004526547A (ja) * | 2001-05-19 | 2004-09-02 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Mr装置用の送信及び受信コイル |
JP2012024306A (ja) * | 2010-07-22 | 2012-02-09 | Toshiba Corp | 磁気共鳴イメージング装置 |
US20120238861A1 (en) * | 2011-03-11 | 2012-09-20 | Matthias Gebhardt | Method and high-frequency check device for checking a high-frequency transmit device of a magnetic resonance tomography system |
Non-Patent Citations (2)
Title |
---|
M. G. ZANCHI ET AL.: "Frequency Offset Cartesian Feedback Control System for MRI Power Amplifier", PROC. INTL. SOC. MAG. RESON. MED. 17, JPN6017022096, April 2009 (2009-04-01), pages #399 * |
P. P. STANG ET AL.: "Vector Iterative Pre-Distortion: An Auto-calibration Method for Transmit Arrays", PROC. INTL. SOC. MAG. RESON. MED. 17, JPN6017022094, April 2009 (2009-04-01), pages #396 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20230116480A (ko) * | 2022-01-28 | 2023-08-04 | 가천대학교 산학협력단 | 다중 소동물 자기공명영상용 rf 코일 |
KR102674224B1 (ko) * | 2022-01-28 | 2024-06-12 | 가천대학교 산학협력단 | 다중 소동물 자기공명영상용 rf 코일 |
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WO2014050640A1 (ja) | 2014-04-03 |
US20140132266A1 (en) | 2014-05-15 |
JP2014079572A (ja) | 2014-05-08 |
US20180106878A1 (en) | 2018-04-19 |
CN103841887B (zh) | 2016-06-08 |
JP6524153B2 (ja) | 2019-06-05 |
CN103841887A (zh) | 2014-06-04 |
US9857445B2 (en) | 2018-01-02 |
JP6181488B2 (ja) | 2017-08-16 |
US10408905B2 (en) | 2019-09-10 |
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