JP4376791B2 - 複数の送信チャネルを有するmr機器用の高周波システム - Google Patents
複数の送信チャネルを有するmr機器用の高周波システム Download PDFInfo
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- JP4376791B2 JP4376791B2 JP2004564371A JP2004564371A JP4376791B2 JP 4376791 B2 JP4376791 B2 JP 4376791B2 JP 2004564371 A JP2004564371 A JP 2004564371A JP 2004564371 A JP2004564371 A JP 2004564371A JP 4376791 B2 JP4376791 B2 JP 4376791B2
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- 230000005540 biological transmission Effects 0.000 title claims description 78
- 238000005259 measurement Methods 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000000079 presaturation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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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
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
- G01R33/3415—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils comprising arrays of sub-coils, i.e. phased-array coils with flexible receiver channels
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Description
Claims (9)
- 複数の共振器素子を有する高周波コイル装置を有するMR機器用の高周波システムであって、前記コイル装置は、送信ユニットに結合され、前記送信ユニットの各送信チャネルは、前記共振器素子に割当てられる、高周波システムであって、
前記送信ユニットは、複数の高周波増幅器を有し、
前記高周波増幅器の入力は、第1の制御可能マルチプレクサ/分配器網を介して低電力送信信号を受信可能であり、
前記高周波増幅器の出力信号は、第2の制御可能マルチプレクサ/分配器網を介して前記送信チャネルに分配可能であることを特徴とする高周波システム。 - 前記マルチプレクサ/分配器網を作動させるために前記送信ユニットに割当てられる制御ユニットを有することを特徴とする請求項1記載の高周波システム。
- 前記送信ユニットの前記高周波増幅器のそれぞれの利得係数は、前記制御ユニットによって制御可能であることを特徴とする請求項2記載の高周波システム。
- 前記制御ユニットに結合され、前記個々の共振器素子によって生成される高周波磁場の強度を決定するよう作用する測定センサを有することを特徴とする請求項3記載の高周波システム。
- 前記低電力送信信号を生成する複数の制御可能高周波信号生成器を有することを特徴とする請求項1乃至4のうちいずれか一項記載の高周波システム。
- 前記送信チャネルを介して前記共振器素子に供給される前記高周波信号の振幅及び位相は、個別に事前に選択可能であることを特徴とする請求項1乃至5のうちいずれか一項記載の高周波システム。
- 各共振器素子に割当てられる複数の受信チャネルを有する受信ユニットを有することを特徴とする請求項1乃至6のうちいずれか一項記載の高周波システム。
- 前記高周波増幅器の出力と、前記第2の制御可能マルチプレクサ/分配器網の対応入力との間、及び/又は、前記第2の制御可能マルチプレクサ/分配器網の出力と、前記高周波コイル装置の対応共振器素子との間に接続される絶縁体を有することを特徴とする請求項1乃至7のうちいずれか一項記載の高周波システム。
- 検査容積内に均一な静磁場を生成する主磁場コイルと、
前記検査容積内に傾斜磁場を生成する多数の傾斜コイルと、
前記検査容積内に高周波磁場を生成し且つ前記検査容積からのMR信号を獲得する高周波システムと、
前記傾斜コイル及び前記高周波システムを作動させる中央制御ユニットと、
前記MR信号を処理及び表示する再構成及び表示ユニットと、
を有するMR機器であって、
前記高周波システムの設計は、請求項1乃至8のうちいずれか一項に記載した設計であることを特徴とするMR機器。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP03100012 | 2003-01-07 | ||
PCT/IB2003/006160 WO2004061469A1 (en) | 2003-01-07 | 2003-12-18 | High-frequency system for an mr apparatus with multiple transmit channels |
Publications (2)
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JP2006512949A JP2006512949A (ja) | 2006-04-20 |
JP4376791B2 true JP4376791B2 (ja) | 2009-12-02 |
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JP2004564371A Expired - Lifetime JP4376791B2 (ja) | 2003-01-07 | 2003-12-18 | 複数の送信チャネルを有するmr機器用の高周波システム |
Country Status (6)
Country | Link |
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US (1) | US7183770B2 (ja) |
EP (1) | EP1585990A1 (ja) |
JP (1) | JP4376791B2 (ja) |
CN (1) | CN1735814B (ja) |
AU (1) | AU2003285670A1 (ja) |
WO (1) | WO2004061469A1 (ja) |
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JP5455926B2 (ja) * | 2007-12-21 | 2014-03-26 | コーニンクレッカ フィリップス エヌ ヴェ | 磁気共鳴安全性監視システムおよび方法 |
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2003
- 2003-12-18 JP JP2004564371A patent/JP4376791B2/ja not_active Expired - Lifetime
- 2003-12-18 EP EP03778662A patent/EP1585990A1/en not_active Ceased
- 2003-12-18 CN CN2003801083919A patent/CN1735814B/zh not_active Expired - Lifetime
- 2003-12-18 AU AU2003285670A patent/AU2003285670A1/en not_active Abandoned
- 2003-12-18 US US10/541,449 patent/US7183770B2/en not_active Expired - Lifetime
- 2003-12-18 WO PCT/IB2003/006160 patent/WO2004061469A1/en active Application Filing
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Publication number | Publication date |
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AU2003285670A1 (en) | 2004-07-29 |
CN1735814B (zh) | 2010-06-16 |
CN1735814A (zh) | 2006-02-15 |
JP2006512949A (ja) | 2006-04-20 |
US20060054810A1 (en) | 2006-03-16 |
WO2004061469A1 (en) | 2004-07-22 |
US7183770B2 (en) | 2007-02-27 |
EP1585990A1 (en) | 2005-10-19 |
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