JP6590992B2 - アンテナコイルを検出する装置及び方法 - Google Patents
アンテナコイルを検出する装置及び方法 Download PDFInfo
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- JP6590992B2 JP6590992B2 JP2018092224A JP2018092224A JP6590992B2 JP 6590992 B2 JP6590992 B2 JP 6590992B2 JP 2018092224 A JP2018092224 A JP 2018092224A JP 2018092224 A JP2018092224 A JP 2018092224A JP 6590992 B2 JP6590992 B2 JP 6590992B2
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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
- G01R33/3628—Tuning/matching of the transmit/receive coil
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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
- G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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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
-
- 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
- G01R33/3642—Mutual coupling or decoupling of multiple coils, e.g. decoupling of a receive coil from a transmission coil, or intentional coupling of RF coils, e.g. for RF magnetic field amplification
- G01R33/3657—Decoupling of multiple RF coils wherein the multiple RF coils do not have the same function in MR, e.g. decoupling of a transmission coil from a receive coil
-
- 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
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
-
- 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
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
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- Condensed Matter Physics & Semiconductors (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Heart & Thoracic Surgery (AREA)
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- Power Engineering (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Description
10 磁石ユニット
11 界磁
12 傾斜磁場コイル
14 ボディコイル
16 被検体トンネル
20 制御ユニット
21 傾斜磁場制御装置
22 高周波ユニット
23 制御器
24 送信器
25 振幅測定器
26 信号バス
50 局所コイル
Claims (10)
- 作動しない離調装置をもつアンテナコイルを検出する装置であって、
送信器(24)と、送信アンテナと、振幅測定器(25)と、制御器(23)とを有し、
前記制御器(23)が、
種々の既定振幅で前記送信アンテナから高周波信号を送出するように前記送信器(24)を制御し、
前記送出した高周波信号に応じて検査振幅を前記振幅測定器(25)により取得し、
前記既定振幅と前記取得した検査振幅との間の検査関係を判定し、
該判定した検査関係が既定の基準関係から逸脱する場合に、前記送信器(24)による高周波信号の送出を制御するように構成され、
前記制御器(23)における前記既定の基準関係が線形関係である、装置。 - 前記振幅測定器(25)が方向性結合器を有し、反射された電力に応じて前記検査振幅を取得するように構成されている、請求項1に記載の装置。
- 前記制御器(23)が、前記振幅測定器(25)により取得した前記検査振幅の位相に基づいて前記検査関係を判定するように構成されている、請求項1又は2に記載の装置。
- 前記制御器(23)が、前記送信アンテナから送出した電力に基づいて前記検査関係を判定するように構成されている、請求項1〜3のいずれか1項に記載の装置。
- 前記送信アンテナから複数の異種既定モードを送出し、複数の前記振幅測定器(25)により複数の検査振幅を取得し、該取得した検査振幅に基づいて1つ以上の検査関係を判定するように構成されている、請求項1〜4のいずれか1項に記載の装置。
- 請求項1〜5のいずれか1項に記載の装置を有する磁気共鳴断層撮影装置であって、
前記送信器(24)が核スピンのための励起パルスを生成するように構成されている、磁気共鳴断層撮影装置。 - 請求項1〜5のいずれか1項に記載の装置を用いて作動しない離調装置をもつアンテナコイルを検出する方法であって、
前記送信器(24)が種々の既定振幅を有する高周波信号を前記送信アンテナから送出するように前記制御器(23)によって前記送信器(24)を制御するステップ(S20)と、
前記送出した高周波信号に応じて前記振幅測定器(25)により検査振幅を取得するステップ(S30)と、
前記既定振幅と前記取得した検査振幅との間の検査関係を判定するステップ(S40)と、
前記判定した検査関係が既定の基準関係から逸脱する場合に、前記送信器(24)による高周波信号の送出を制御するステップ(S50)と、を含み、
前記制御器(23)における前記既定の基準関係が線形関係である、方法。 - アンテナコイルの離調装置を停止させるステップ(S10)をさらに含み、
該アンテナコイルは、前記送信器(24)を制御するステップ(S20)において前記高周波信号の適切な電磁場強度を有する領域に配置されている、請求項7に記載の方法。 - プログラミング可能な制御器(23)のプロセッサに直接的にロード可能であるコンピュータプログラムであって、
前記制御器(23)で実行されたときに請求項7又は8に記載の方法の全ステップを実行するためのプログラムコード手段を有する、コンピュータプログラム。 - 電子的に読取可能な制御情報を記憶したコンピュータ読取可能な記憶媒体であって、
請求項6に記載の磁気共鳴断層撮影装置(1)の制御器(23)において当該記憶媒体を使用することにより請求項7又は8に記載の方法が実行されるように前記制御情報が構成されている、記憶媒体。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP17170596.5A EP3287805B1 (de) | 2017-05-11 | 2017-05-11 | Sar sicherheits-vorrichtung und -verfahren zum erkennen von ent-verstimmung von mr antennenspulen. |
EP17170596.5 | 2017-05-11 |
Publications (3)
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JP2018187397A JP2018187397A (ja) | 2018-11-29 |
JP2018187397A5 JP2018187397A5 (ja) | 2019-05-16 |
JP6590992B2 true JP6590992B2 (ja) | 2019-10-16 |
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US (1) | US10345401B2 (ja) |
EP (1) | EP3287805B1 (ja) |
JP (1) | JP6590992B2 (ja) |
KR (1) | KR101932104B1 (ja) |
CN (1) | CN108872895B (ja) |
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EP3796019B1 (de) * | 2019-09-23 | 2023-11-15 | Siemens Healthcare GmbH | Verfahren und vorrichtung zum erkennen von defekten verstimmschaltungen bei einem magnetresonanztomographen |
CA3076973C (en) * | 2019-03-29 | 2023-10-31 | Neptune Technology Group Inc. | Antenna detection using antenna return loss |
DE102019220054A1 (de) | 2019-12-18 | 2021-06-24 | Siemens Healthcare Gmbh | Vorrichtung und Verfahren zur Echtzeitüberwachung und Kontrolle von Lokalspulen |
EP3945332A1 (en) * | 2020-07-28 | 2022-02-02 | Koninklijke Philips N.V. | Detection of unconnected mr coils and localization of misplaced coils |
EP4001944A1 (en) * | 2020-11-12 | 2022-05-25 | Koninklijke Philips N.V. | Radio frequency receiver with detection of a malfunction of a detune circuit |
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JP3842783B2 (ja) * | 2001-06-26 | 2006-11-08 | シーメンス アクチエンゲゼルシヤフト | 磁気共鳴装置 |
CN101171761B (zh) * | 2005-04-29 | 2012-06-20 | 皇家飞利浦电子股份有限公司 | 在多通道发送/接收天线设备中用于功率监视的方法和电路装置 |
DE102006061740A1 (de) * | 2006-12-28 | 2008-07-10 | Siemens Ag | Verfahren und Kontrolleinrichtung zur Kontrolle der Hochfrequenzbelastung bei einer Magnetresonanzmessung |
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 |
JP5558737B2 (ja) * | 2008-06-26 | 2014-07-23 | 株式会社東芝 | 磁気共鳴イメージング装置 |
US8102177B2 (en) * | 2009-03-31 | 2012-01-24 | General Electric Company | Using S-parameter measurements to manage SAR and transmit gain in MRI |
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 |
US10215818B2 (en) * | 2013-04-23 | 2019-02-26 | Koninklijke Philips N.V. | Single coaxial interface for magnetic resonace (MR) coils |
US20160313419A1 (en) * | 2013-12-20 | 2016-10-27 | Koninklijke Philips N.V. | Radio frequency safety switch with adjustable switching level for mri systems |
DE102015217723B4 (de) | 2015-09-16 | 2018-08-02 | Siemens Healthcare Gmbh | Lokale Sendespule mit integrierter Sicherheitseinrichtung |
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2017
- 2017-05-11 EP EP17170596.5A patent/EP3287805B1/de active Active
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2018
- 2018-05-08 KR KR1020180052447A patent/KR101932104B1/ko active IP Right Grant
- 2018-05-10 CN CN201810442228.4A patent/CN108872895B/zh active Active
- 2018-05-11 JP JP2018092224A patent/JP6590992B2/ja active Active
- 2018-05-11 US US15/977,207 patent/US10345401B2/en active Active
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Publication number | Publication date |
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JP2018187397A (ja) | 2018-11-29 |
KR101932104B1 (ko) | 2018-12-24 |
US20180329003A1 (en) | 2018-11-15 |
KR20180124743A (ko) | 2018-11-21 |
CN108872895B (zh) | 2020-08-07 |
US10345401B2 (en) | 2019-07-09 |
EP3287805A1 (de) | 2018-02-28 |
CN108872895A (zh) | 2018-11-23 |
EP3287805B1 (de) | 2019-06-26 |
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