JP2015516255A - 磁気共鳴コイル系の複数のコイル要素に無線周波数信号を供給する給電回路装置 - Google Patents
磁気共鳴コイル系の複数のコイル要素に無線周波数信号を供給する給電回路装置 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
- G01R33/28—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
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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
- 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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- 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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- 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
- G01R33/3664—Switching for purposes other than coil coupling or decoupling, e.g. switching between a phased array mode and a quadrature mode, switching between surface coil modes of different geometrical shapes, switching from a whole body reception coil to a local reception coil or switching for automatic coil selection in moving table MR or for changing the field-of-view
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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
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/387—Compensation of inhomogeneities
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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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- 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
- G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
- G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency
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- Signal Processing (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
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Abstract
Description
Claims (15)
- 磁気共鳴コイル系の複数のコイル要素に無線周波数信号を供給する給電回路装置であって、
無線周波数信号源を接続する主ラインと、
各々が前記コイル系の対応するコイル要素を接続する複数の給電ラインと、
前記主ラインと前記複数の給電ラインとの間に配置され、前記主ライン上の信号を前記給電ラインの各々に分配するパワーディバイダとを有し、
前記給電ラインの少なくとも1つは、前記給電ラインの2つのラインセクションの接続/切断をする制御可能切り替え回路と、前記ディバイダ側の第1のラインセクションと、前記コイル要素に接続可能な側の第2のラインセクションとを有し、
前記切り替え回路が、さらに前記第1のラインセクションのライン終端をする、所定終端抵抗を有する少なくとも1つの接続可能終端要素を有し、または前記主ラインが終端手段に相互接続されたサーキュレータデバイスを有する、
給電回路装置。 - 前記少なくとも1つの終端要素は、前記終端要素を接続するさらに別の切り替え要素と直列に接続されている、請求項1に記載の給電回路装置。
- 前記終端要素は50オームまたは100オームの所定の終端抵抗を有する、
請求項1に記載の給電回路装置。 - 前記第2のラインセクションの少なくとも1つのライン終端をする終端要素は、ゼロオーム、または50オームまたは100オームまたは10キロオームより大きい所定の終端抵抗を有し、またはラムダ/4要素により追加的に変換されている、
請求項1に記載の給電回路装置。 - 前記切り替え要素はPINダイオードである、
請求項1に記載の給電回路装置。 - 前記さらに別の切り替え要素はPINダイオードである、
請求項2に記載の給電回路装置。 - 前記給電回路装置はさらに少なくとも1つの送受信切り替えデバイスを有する、
請求項1に記載の給電回路装置。 - 前記少なくとも1つの送受信切り替えデバイスは、前記少なくとも1つの切り替え回路とは独立な切り替えデバイスである、請求項7に記載の給電回路装置。
- 前記主ラインは前記1つの送受信切り替えデバイスを有し、または前記給電ラインの各々は前記送受信切り替えデバイスのうちの1つを有する、
請求項7に記載の給電回路装置。 - 前記パワーディバイダは、少なくとも1つの給電ラインの位相をシフトする少なくとも1つの位相シフタ要素を有する、請求項1に記載の給電回路装置。
- 前記給電回路装置の、前記少なくとも1つの切り替え要素以外のすべての電気的コンポーネントは、受動コンポーネントである、請求項1に記載の給電回路装置。
- 磁気共鳴コイル系を有する磁気共鳴システムの並列送信器システム、好ましくは送受信器システムであって、
複数のコイル要素と、
無線周波数信号源と、
請求項1に記載の給電回路装置と、
前記切り替え回路の切り替え要素を制御するコントローラを有するコントローラシステムとを有する、
並列送信器システム。 - 請求項12に記載の並列送信器システムのコイル要素を切り替える方法であって、
校正データ及び/またはユーザ入力に応じて、前記コントローラシステムと、前記切り替え要素及び/またはさらに別の切り替え要素により、前記切り替えが実行される、
方法。 - 前記校正データは前記コイル要素の感度プロファイルのデータ及び/または前記コイル要素の位置のデータである、請求項13に記載の方法。
- 前記ユーザ入力は視野の選択及び/またはスキャンタイプの選択である、請求項13に記載の方法。
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US201261646392P | 2012-05-14 | 2012-05-14 | |
US61/646,392 | 2012-05-14 | ||
PCT/IB2013/053511 WO2013171611A1 (en) | 2012-05-14 | 2013-05-03 | Feeding circuit arrangement for supplying a radio frequency signal to a plurality of coil elements of a magnetic resonance coil system |
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JP2015516255A true JP2015516255A (ja) | 2015-06-11 |
JP6220384B2 JP6220384B2 (ja) | 2017-10-25 |
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JP2015512154A Active JP6220384B2 (ja) | 2012-05-14 | 2013-05-03 | 磁気共鳴コイル系の複数のコイル要素に無線周波数信号を供給する給電回路装置 |
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US (1) | US9989600B2 (ja) |
EP (1) | EP2850446B1 (ja) |
JP (1) | JP6220384B2 (ja) |
CN (1) | CN104303069B (ja) |
BR (1) | BR112014028136A2 (ja) |
RU (1) | RU2620861C2 (ja) |
WO (1) | WO2013171611A1 (ja) |
Families Citing this family (5)
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US10564238B2 (en) | 2014-12-17 | 2020-02-18 | General Electric Company | Systems and methods for energizing magnets of magnetic resonance imaging (MRI) systems |
WO2017174552A1 (en) | 2016-04-04 | 2017-10-12 | Koninklijke Philips N.V. | Rf transmit system with selectable drive ports for magnetic resonance imaging apparatuses |
EP3470864A1 (en) | 2017-10-12 | 2019-04-17 | Koninklijke Philips N.V. | Feeding a coil for magnetic resonance imaging |
CN110133551B (zh) * | 2019-05-14 | 2021-12-21 | 上海联影医疗科技股份有限公司 | 射频发射装置及磁共振成像系统 |
US11133957B2 (en) * | 2019-05-29 | 2021-09-28 | Trane International Inc. | HVAC controller area network hybrid network topology |
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- 2013-05-03 WO PCT/IB2013/053511 patent/WO2013171611A1/en active Application Filing
- 2013-05-03 BR BR112014028136A patent/BR112014028136A2/pt not_active Application Discontinuation
- 2013-05-03 CN CN201380025443.XA patent/CN104303069B/zh active Active
- 2013-05-03 US US14/401,008 patent/US9989600B2/en active Active
- 2013-05-03 JP JP2015512154A patent/JP6220384B2/ja active Active
- 2013-05-03 RU RU2014150515A patent/RU2620861C2/ru active
- 2013-05-03 EP EP13732243.4A patent/EP2850446B1/en active Active
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CN104303069A (zh) | 2015-01-21 |
EP2850446B1 (en) | 2023-07-12 |
RU2620861C2 (ru) | 2017-05-30 |
BR112014028136A2 (pt) | 2017-06-27 |
US9989600B2 (en) | 2018-06-05 |
CN104303069B (zh) | 2017-08-15 |
RU2014150515A (ru) | 2016-07-10 |
EP2850446A1 (en) | 2015-03-25 |
US20150177342A1 (en) | 2015-06-25 |
WO2013171611A1 (en) | 2013-11-21 |
JP6220384B2 (ja) | 2017-10-25 |
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