JP2021519178A - チューニングシステムを有する無線周波数(rf)アンテナ素子 - Google Patents
チューニングシステムを有する無線周波数(rf)アンテナ素子 Download PDFInfo
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- 238000005401 electroluminescence Methods 0.000 claims abstract description 52
- 230000003287 optical effect Effects 0.000 claims description 28
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- 238000002592 echocardiography Methods 0.000 description 4
- 238000004020 luminiscence type Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000002595 magnetic resonance imaging Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 230000000903 blocking effect Effects 0.000 description 2
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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
- G01R33/3692—Electrical details, e.g. matching or coupling of the coil to the receiver involving signal transmission without using electrically conductive connections, e.g. wireless communication or optical communication of the MR signal or an auxiliary signal other than the MR signal
-
- 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
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- Condensed Matter Physics & Semiconductors (AREA)
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
Claims (8)
- チューニング/デチューニングシステムを有する無線周波数(RF)アンテナ素子であって、
前記RFアンテナ素子は、共振導電性ループを有し、
前記チューニング/デチューニングシステムは、前記共振導電性ループをチューニング又はデチューンするためのエレクトロルミネッセンススイッチング素子を有し、
前記エレクトロルミネッセントスイッチング素子は、前記共振導電性ループに結合されており
前記チューニング/デチューニングシステムは、前記エレクトロルミネセンススイッチング素子からのエレクトロルミネセンス信号を検出するための光電変換素子を有する、RFアンテナ素子。 - 前記エレクトロルミネセンススイッチング素子は、スイッチング素子と直列に接続された光検出器を有し、
前記チューニング/デチューニングシステムは、制御光放射ビームによって前記光検出器に光学的に結合される制御光源を有し、前記制御光源は、前記導電性ループの状態を共振と非共振との間で切り替えるように構成され、
前記光検出器は、前記光検出器からのエレクトロルミネセンス信号を電子フィードバック信号に変換するための光電変換素子に光学的に結合される、請求項1に記載のRFアンテナ素子。 - 前記チューニング/デチューニングシステムは、前記エレクトロルミネッセンススイッチング素子に光学的に結合される注入光源を有し、前記注入光源は、前記導電性ループの状態を共振と非共振との間で切り替えるように構成され、
前記エレクトロルミネッセンススイッチング素子は、前記エレクトロルミネッセンス素子からのエレクトロルミネセンス信号を電子フィードバック信号に変換するために、前記光電変換素子に光学的に結合される、請求項1に記載のRFアンテナ素子。 - 前記電子フィードバック信号が前記エレクトロルミネセンススイッチング素子の状態を表す、請求項2又は3に記載のRFアンテナ素子。
- 前記電子フィードバック信号が前記導電性ループの実際の負荷を表す、請求項2又は3に記載のRFアンテナ素子。
- 前記電子フィードバック信号が、前記導電性ループ内に誘導されるRF電圧を表す、請求項2乃至4のいずれか1項に記載のRFアンテナ素子。
- 光分離器又はダイクロイックミラーが、前記エレクトロルミネッセンス素子と前記制御光源との間の光路、及び前記光検出器と前記光電変換素子との間の光路に構成される、請求項2、4又は5に記載のRFアンテナ素子。
- 光分離器又はダイクロイックミラーが、前記エレクトロルミネセンススイッチング素子と前記注入光源との間の光路と、前記エレクトロルミネセンススイッチング素子と前記光電変換素子との間の光路内に設けられる、請求項3に記載のRFアンテナ素子。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18164905.4 | 2018-03-29 | ||
EP18164905.4A EP3546969A1 (en) | 2018-03-29 | 2018-03-29 | Radio frequency (rf) antenna element with a detuning system |
PCT/EP2019/057483 WO2019185568A1 (en) | 2018-03-29 | 2019-03-26 | Radio frequency (rf) antenna element with a detuning system |
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JP2021519178A true JP2021519178A (ja) | 2021-08-10 |
JPWO2019185568A5 JPWO2019185568A5 (ja) | 2022-01-26 |
JP7324223B2 JP7324223B2 (ja) | 2023-08-09 |
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JP2020552765A Active JP7324223B2 (ja) | 2018-03-29 | 2019-03-26 | チューニングシステムを有する無線周波数(rf)アンテナ素子 |
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US (1) | US11137459B2 (ja) |
EP (2) | EP3546969A1 (ja) |
JP (1) | JP7324223B2 (ja) |
CN (1) | CN111936877A (ja) |
WO (1) | WO2019185568A1 (ja) |
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JP2017131663A (ja) * | 2016-01-26 | 2017-08-03 | 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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2018
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2019
- 2019-03-26 CN CN201980023611.9A patent/CN111936877A/zh active Pending
- 2019-03-26 WO PCT/EP2019/057483 patent/WO2019185568A1/en active Application Filing
- 2019-03-26 JP JP2020552765A patent/JP7324223B2/ja active Active
- 2019-03-26 EP EP19712215.3A patent/EP3775953A1/en active Pending
- 2019-03-26 US US17/042,403 patent/US11137459B2/en active Active
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JP7324223B2 (ja) | 2023-08-09 |
WO2019185568A1 (en) | 2019-10-03 |
US20210141038A1 (en) | 2021-05-13 |
CN111936877A (zh) | 2020-11-13 |
EP3546969A1 (en) | 2019-10-02 |
EP3775953A1 (en) | 2021-02-17 |
US11137459B2 (en) | 2021-10-05 |
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