JP5426590B2 - Mri装置 - Google Patents
Mri装置 Download PDFInfo
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- JP5426590B2 JP5426590B2 JP2011048948A JP2011048948A JP5426590B2 JP 5426590 B2 JP5426590 B2 JP 5426590B2 JP 2011048948 A JP2011048948 A JP 2011048948A JP 2011048948 A JP2011048948 A JP 2011048948A JP 5426590 B2 JP5426590 B2 JP 5426590B2
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- coils
- magnetic field
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- coil
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- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003068 static effect Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 description 17
- 230000005284 excitation Effects 0.000 description 16
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 15
- 238000013480 data collection Methods 0.000 description 13
- 238000002595 magnetic resonance imaging Methods 0.000 description 13
- 238000003384 imaging method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000002592 echocardiography Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000002847 impedance measurement Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
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- Magnetic Resonance Imaging Apparatus (AREA)
Description
出力電力は、コイル802に無負荷時と同一強度のRF磁場を発生させるRF電力となる。これによって、コイル802に無負荷時と同一強度のRF磁場を発生させるRF電力を供給するための、パワーアンプ402のゲインが定まる。
100 マグネットシステム
102 主磁場コイル部
106 勾配コイル部
108 RFコイル部
110 受信コイル部
130 勾配駆動部
140 RF駆動部
150 データ収集部
160 シーケンス制御部
170 データ処理部
180 表示部
190 操作部
500 クレードル
802−808 コイル
402−408 パワーアンプ
412−418 送受切換器
420−428 センサ
430 調節部
440 信号測定部
450 インピーダンス測定部
Claims (3)
- 静磁場、勾配磁場、および複数のRFコイルによるRF磁場を対象に印加して発生させた磁気共鳴信号に基づいて画像を再構成するMRI装置であって、
複数のRFコイルにより対象にそれぞれ印加されるRF磁場の強度が均等になるように複数のRFコイルの供給電力の比を調節する調節手段と、
複数のRFコイルの各々のインピーダンスを測定するインピーダンス測定部と、
を具備し、
前記調節手段は、
前記インピーダンス測定部により測定されたインピーダンスに基づいて前記比を調節することを特徴とする記載のMRI装置。 - 前記比は、前記インピーダンスの逆数の比である、
ことを特徴とする請求項1に記載のMRI装置。 - 前記複数のRFコイルは対象を円筒状に取り囲む、
ことを特徴とする請求項1又は2に記載のMRI装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011048948A JP5426590B2 (ja) | 2011-03-07 | 2011-03-07 | Mri装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011048948A JP5426590B2 (ja) | 2011-03-07 | 2011-03-07 | Mri装置 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004337268A Division JP4739735B2 (ja) | 2004-11-22 | 2004-11-22 | Mri装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011104429A JP2011104429A (ja) | 2011-06-02 |
JP5426590B2 true JP5426590B2 (ja) | 2014-02-26 |
Family
ID=44228567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011048948A Active JP5426590B2 (ja) | 2011-03-07 | 2011-03-07 | Mri装置 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5426590B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7220883B2 (ja) | 2017-03-24 | 2023-02-13 | 敷島金属工業株式会社 | 錠前装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8802608A (nl) * | 1988-10-24 | 1990-05-16 | Philips Nv | Magnetisch resonantie apparaat met verbeterde rf spoel. |
JPH09262220A (ja) * | 1996-03-29 | 1997-10-07 | Hitachi Medical Corp | 磁気共鳴イメージング装置 |
DE10124465A1 (de) * | 2001-05-19 | 2002-11-21 | Philips Corp Intellectual Pty | Sende- und Empfangsspule für MR-Gerät |
US6411090B1 (en) * | 2001-07-02 | 2002-06-25 | Ge Medical Systems Global Technology Company, Llc | Magnetic resonance imaging transmit coil |
JP2004097606A (ja) * | 2002-09-11 | 2004-04-02 | Ge Medical Systems Global Technology Co Llc | Rfコイル及びそれを用いた磁気共鳴撮像装置 |
CN1720463A (zh) * | 2002-12-06 | 2006-01-11 | 皇家飞利浦电子股份有限公司 | 具有多个发射线圈的磁共振成像系统 |
JP4376791B2 (ja) * | 2003-01-07 | 2009-12-02 | 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 | 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 |
US7053618B2 (en) * | 2003-11-26 | 2006-05-30 | General Electric Company | Method and apparatus to generate an RF excitation consistent with a desired excitation profile using a transmit coil array |
-
2011
- 2011-03-07 JP JP2011048948A patent/JP5426590B2/ja active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7220883B2 (ja) | 2017-03-24 | 2023-02-13 | 敷島金属工業株式会社 | 錠前装置 |
Also Published As
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JP2011104429A (ja) | 2011-06-02 |
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