DE3852915T2 - NMR QD RF-Spule mit einem von Dioden eingeschalteten Verstimmungskreis, zur Reduktion von Störungen. - Google Patents
NMR QD RF-Spule mit einem von Dioden eingeschalteten Verstimmungskreis, zur Reduktion von Störungen.Info
- Publication number
- DE3852915T2 DE3852915T2 DE3852915T DE3852915T DE3852915T2 DE 3852915 T2 DE3852915 T2 DE 3852915T2 DE 3852915 T DE3852915 T DE 3852915T DE 3852915 T DE3852915 T DE 3852915T DE 3852915 T2 DE3852915 T2 DE 3852915T2
- Authority
- DE
- Germany
- Prior art keywords
- coil
- diodes
- current flowing
- nmr
- transmission line
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- G01R33/32—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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/091,916 US4782298A (en) | 1987-09-01 | 1987-09-01 | MRI QD RF coil having diode switched detuning circuit producing reduced artifact |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3852915D1 DE3852915D1 (de) | 1995-03-16 |
DE3852915T2 true DE3852915T2 (de) | 1995-06-14 |
Family
ID=22230289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3852915T Expired - Fee Related DE3852915T2 (de) | 1987-09-01 | 1988-08-20 | NMR QD RF-Spule mit einem von Dioden eingeschalteten Verstimmungskreis, zur Reduktion von Störungen. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4782298A (de) |
EP (1) | EP0305830B1 (de) |
JP (1) | JP2554364B2 (de) |
AT (1) | ATE118100T1 (de) |
DE (1) | DE3852915T2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004007632B4 (de) * | 2003-05-24 | 2011-02-10 | Nagy, Sándor | Katalysatorlaserantrieb mit Hochfrequenzresonanzanlage |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4812764A (en) * | 1988-03-31 | 1989-03-14 | Varian Associates, Inc. | Calibrated decoupling of tightly coupled concentric surface coils |
US4887039A (en) * | 1988-12-22 | 1989-12-12 | General Electric Company | Method for providing multiple coaxial cable connections to a radio-frequency antenna without baluns |
JPH02203839A (ja) * | 1989-02-03 | 1990-08-13 | Hitachi Ltd | 核磁気共鳴を用いた検査装置 |
US5256972A (en) * | 1990-01-30 | 1993-10-26 | Elscint, Ltd. | Body coil decoupling circuit |
US5049821A (en) * | 1990-02-15 | 1991-09-17 | University Of Florida | Continuously variable field of view surface coil for NMR imaging |
US5216367A (en) * | 1990-02-21 | 1993-06-01 | Kabushiki Kaisha Toshiba | MR imaging apparatus capable of automatically selecting multiple surface coils |
US5172061A (en) * | 1990-09-18 | 1992-12-15 | The Regents Of The University Of California | Q control for capacitively coupled MRI/MRSI RF coil |
DE4030878A1 (de) * | 1990-09-29 | 1992-04-02 | Siemens Ag | Doppel-oberflaechenspule fuer ein kernspinresonanzgeraet |
DE4030877A1 (de) * | 1990-09-29 | 1992-04-02 | Siemens Ag | Doppel-oberflaechenspule fuer ein kernspinresonanzgeraet |
US5510714A (en) * | 1991-08-09 | 1996-04-23 | Hitachi, Ltd. | Magnetic resonance imaging apparatus and RF coil employed therein |
US5621323A (en) * | 1991-11-29 | 1997-04-15 | Magnetic Research, Inc. | Surface coil elements |
US5278505A (en) * | 1991-12-17 | 1994-01-11 | The Regents Of The University Of California | Self-cancelling RF receive coil used to decouple MRI transmit/receive RF coils |
US5243287A (en) * | 1992-04-27 | 1993-09-07 | General Electric Company | Dynamically detuned NMR field coil |
US5483158A (en) * | 1993-10-21 | 1996-01-09 | The Regents Of The University Of California | Method and apparatus for tuning MRI RF coils |
US5461314A (en) * | 1993-10-21 | 1995-10-24 | The Regents Of The University Of California | MRI front end apparatus and method of operation |
JP3422560B2 (ja) * | 1994-05-19 | 2003-06-30 | ジーイー横河メディカルシステム株式会社 | Mri用rfコイル及びmri装置 |
US5543713A (en) * | 1994-12-01 | 1996-08-06 | The Regents Of The University Of California | Ground breaker for multiple control lines |
US6967547B2 (en) * | 2002-06-24 | 2005-11-22 | Signal Technology Corporation | RF switch including diodes with intrinsic regions |
JP2005045346A (ja) * | 2003-07-23 | 2005-02-17 | Toshiba Tec Corp | 平面アンテナ及びこれを用いた無線装置 |
US6989673B2 (en) * | 2003-11-26 | 2006-01-24 | General Electric Company | Method and apparatus to reduce RF power deposition during MR data acquisition |
DE10356274B4 (de) * | 2003-11-28 | 2007-06-14 | Siemens Ag | Verstimmschaltungseinheit |
WO2005086817A2 (en) * | 2004-03-08 | 2005-09-22 | New York University | Active radio frequency coil for high field magnetic resonance imaging |
JP4327119B2 (ja) * | 2005-04-22 | 2009-09-09 | 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 | 切換装置、rfコイル及び磁気共鳴撮像装置 |
EP2047732B1 (de) * | 2006-07-25 | 2010-12-29 | Koninklijke Philips Electronics N.V. | Geformte kabelhalter |
DE102007016312B4 (de) | 2007-04-04 | 2010-06-17 | Siemens Ag | Birdcage-ähnliche Sendeantenne für Magnetresonanzanwendungen mit verschieden voneinander ausgebildeten Abschlusselementen |
JP2009148552A (ja) * | 2007-11-27 | 2009-07-09 | Hoya Corp | 無線観測装置及び内視鏡システム |
US9864032B2 (en) * | 2010-01-05 | 2018-01-09 | National Health Research Institutes | Magnetic resonance imaging system |
CN102821685B (zh) | 2010-02-16 | 2016-08-03 | 杜克大学 | 用于使用全氟气体混合物的肺活体内磁共振成像的系统、方法、组成和设备 |
CN101819263A (zh) * | 2010-03-23 | 2010-09-01 | 苏州工业园区朗润科技有限公司 | 用于核磁共振系统中射频发射线圈的失谐电路和方法 |
DE102012211147B4 (de) * | 2012-06-28 | 2017-08-31 | Siemens Healthcare Gmbh | Automatische Verstimmung nicht angeschlossener Sende-Empfangsspulen für MRI |
JP6318236B2 (ja) * | 2013-04-23 | 2018-05-09 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | 磁気共鳴(mr)コイルのための単一の同軸インタフェース |
CN104166114B (zh) * | 2013-05-28 | 2015-09-30 | 上海联影医疗科技有限公司 | Fid和/或dc伪影校正方法及装置、mri采集与重建方法 |
US9827448B2 (en) * | 2014-03-21 | 2017-11-28 | Siemens Aktiengesellschaft | Hybrid ultrasound and magnetic resonance imaging device |
KR101909070B1 (ko) * | 2016-09-29 | 2018-12-10 | 삼성전자주식회사 | Rf 수신 코일 및 이를 포함하는 국부 코일 장치 |
US11156682B2 (en) * | 2017-03-24 | 2021-10-26 | Quality Electrodynamics, Llc | Single layer magnetic resonance imaging transmit/receive radio frequency coil for different anatomies |
WO2023049506A1 (en) * | 2021-09-27 | 2023-03-30 | Hyperfine Operations, Inc. | Counter rotating current coil for magnetic resonance imaging |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4093911A (en) * | 1977-02-22 | 1978-06-06 | Varian Associates, Inc. | Nuclear magnetic resonance spectrometer employing an improved resonance signal gating circuit |
NL8401671A (nl) * | 1984-05-25 | 1985-12-16 | Philips Nv | Kernspinresonantie apparaat met oppervlaktespoel detectie. |
US4620155A (en) * | 1984-08-16 | 1986-10-28 | General Electric Company | Nuclear magnetic resonance imaging antenna subsystem having a plurality of non-orthogonal surface coils |
US4649348A (en) * | 1984-08-20 | 1987-03-10 | Technicare Corporation | Radio frequency coils for nuclear magnetic resonance imaging systems |
US4793356A (en) * | 1985-08-14 | 1988-12-27 | Picker International, Inc. | Surface coil system for magnetic resonance imaging |
US4717881A (en) * | 1985-11-15 | 1988-01-05 | Technicare Corporation | Radio frequency coils for nuclear magnetic resonance imaging systems |
US4682125A (en) * | 1986-02-10 | 1987-07-21 | The Regents Of The University Of California | RF coil coupling for MRI with tuned RF rejection circuit using coax shield choke |
DE3771630D1 (de) * | 1986-09-22 | 1991-08-29 | Siemens Ag | Kernspin-resonanzgeraet zur ermittlung von spektren oder bildern eines untersuchungsobjektes. |
-
1987
- 1987-09-01 US US07/091,916 patent/US4782298A/en not_active Expired - Lifetime
-
1988
- 1988-08-20 EP EP88113555A patent/EP0305830B1/de not_active Expired - Lifetime
- 1988-08-20 DE DE3852915T patent/DE3852915T2/de not_active Expired - Fee Related
- 1988-08-20 AT AT88113555T patent/ATE118100T1/de not_active IP Right Cessation
- 1988-09-01 JP JP63216445A patent/JP2554364B2/ja not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004007632B4 (de) * | 2003-05-24 | 2011-02-10 | Nagy, Sándor | Katalysatorlaserantrieb mit Hochfrequenzresonanzanlage |
Also Published As
Publication number | Publication date |
---|---|
EP0305830B1 (de) | 1995-02-01 |
DE3852915D1 (de) | 1995-03-16 |
US4782298A (en) | 1988-11-01 |
JPH01164357A (ja) | 1989-06-28 |
JP2554364B2 (ja) | 1996-11-13 |
ATE118100T1 (de) | 1995-02-15 |
EP0305830A2 (de) | 1989-03-08 |
EP0305830A3 (en) | 1990-09-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |