DE4092430T1 - - Google Patents
Info
- Publication number
- DE4092430T1 DE4092430T1 DE19904092430 DE4092430T DE4092430T1 DE 4092430 T1 DE4092430 T1 DE 4092430T1 DE 19904092430 DE19904092430 DE 19904092430 DE 4092430 T DE4092430 T DE 4092430T DE 4092430 T1 DE4092430 T1 DE 4092430T1
- Authority
- DE
- Germany
- 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.)
- Ceased
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
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
- G01R33/34076—Birdcage coils
-
- 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
- G01R33/42—Screening
- G01R33/422—Screening of the radio frequency field
-
- 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
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/565—Correction of image distortions, e.g. due to magnetic field inhomogeneities
- G01R33/5659—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of the RF magnetic field, e.g. spatial inhomogeneities of the RF magnetic field
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/467,475 US5017872A (en) | 1990-01-19 | 1990-01-19 | NMR radio frequency coil with dielectric loading for improved field homogeneity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4092430T1 true DE4092430T1 (US07413550-20080819-C00001.png) | 1993-06-03 |
Family
ID=23855852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19904092430 Ceased DE4092430T1 (US07413550-20080819-C00001.png) | 1990-01-19 | 1990-12-07 |
Country Status (5)
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220302A (en) * | 1990-01-22 | 1993-06-15 | The University Of Texas System Board Of Regents | Nmr clinical chemistry analyzer and method of forming a shield |
| JPH0816694B2 (ja) * | 1991-02-05 | 1996-02-21 | ゼネラル・エレクトリック・カンパニイ | 動作効率向上のために誘電体をそなえたｎｍｒ無線周波コイル |
| DE69227096T2 (de) * | 1991-08-07 | 1999-02-25 | Varian Associates | Magnetische Kernresonanz-Sonde mit Hochfrequenz-Abschirmung der Sonde. |
| US5367261A (en) * | 1992-07-02 | 1994-11-22 | General Electric Company | Shield for a magnetic resonance imaging coil |
| US5453692A (en) * | 1992-08-06 | 1995-09-26 | Hitachi, Ltd. | RF probe for nuclear magnetic resonance imaging (MRI) devices |
| US5412322A (en) * | 1993-06-24 | 1995-05-02 | Wollin Ventures, Inc. | Apparatus and method for spatially ordered phase encoding and for determining complex permittivity in magnetic resonance by using superimposed time-varying electric fields |
| US5483163A (en) * | 1993-08-12 | 1996-01-09 | The United States Of America As Represented By The Department Of Health And Human Services | MRI coil using inductively coupled individually tuned elements arranged as free-pivoting components |
| US5744957A (en) * | 1995-08-15 | 1998-04-28 | Uab Research Foundation | Cavity resonator for NMR systems |
| US6049206A (en) * | 1996-08-19 | 2000-04-11 | National Research Council Of Canada | Compensation for inhomogeneity of the field generated by the RF coil in a nuclear magnetic resonance system |
| US6633161B1 (en) | 1999-05-21 | 2003-10-14 | The General Hospital Corporation | RF coil for imaging system |
| US7598739B2 (en) * | 1999-05-21 | 2009-10-06 | Regents Of The University Of Minnesota | Radio frequency gradient, shim and parallel imaging coil |
| EP1305649A2 (en) * | 2000-07-31 | 2003-05-02 | Regents Of The University Of Minnesota | Open tem resonators for mri |
| JP3926111B2 (ja) * | 2001-03-26 | 2007-06-06 | 日本電子株式会社 | 共鳴信号検出器 |
| US6771070B2 (en) * | 2001-03-30 | 2004-08-03 | Johns Hopkins University | Apparatus for magnetic resonance imaging having a planar strip array antenna including systems and methods related thereto |
| US6822448B2 (en) | 2001-04-20 | 2004-11-23 | General Electric Company | RF coil for very high field magnetic resonance imaging |
| WO2003058283A1 (en) * | 2001-12-31 | 2003-07-17 | The Johns Hopkins University School Of Medicine | Mri tunable antenna and system |
| DE10345176B4 (de) * | 2003-09-29 | 2007-07-26 | Siemens Ag | Lokalspuleneinheit eines Magnetresonanzgeräts |
| DE602005006772D1 (de) * | 2004-03-29 | 2008-06-26 | Koninkl Philips Electronics Nv | System zur magnetresonanzabbildung |
| AU2005242783A1 (en) * | 2004-05-07 | 2005-11-24 | Regents Of The University Of Minnesota | Multi-current elements for magnetic resonance radio frequency coils |
| JPWO2008075614A1 (ja) * | 2006-12-21 | 2010-04-08 | 株式会社日立製作所 | 核磁気共鳴計測装置およびコイルユニット |
| DE102007004812B4 (de) * | 2007-01-31 | 2012-04-26 | Siemens Ag | Anordnung zur Einstrahlung eines Hochfrequenzfelds |
| US7816918B2 (en) * | 2007-05-24 | 2010-10-19 | The Johns Hopkins University | Optimized MRI strip array detectors and apparatus, systems and methods related thereto |
| US8049501B2 (en) * | 2008-04-11 | 2011-11-01 | General Electric Company | Multi-frequency RF coil |
| EP2283375B1 (en) * | 2008-04-18 | 2014-11-12 | Eidgenössische Technische Hochschule (ETH) | Travelling-wave nuclear magnetic resonance method |
| CN103261906B (zh) * | 2010-12-16 | 2016-03-16 | 皇家飞利浦电子股份有限公司 | 无源b1场匀场 |
| US9041397B2 (en) * | 2012-02-01 | 2015-05-26 | General Electric Company | Radio frequency (RF) body coil assembly for dual-modality imaging |
| US9146293B2 (en) | 2012-02-27 | 2015-09-29 | Ohio State Innovation Foundation | Methods and apparatus for accurate characterization of signal coil receiver sensitivity in magnetic resonance imaging (MRI) |
| KR102145001B1 (ko) | 2014-01-03 | 2020-08-14 | 삼성전자주식회사 | 알에프 코일 구조물 |
| WO2015102434A1 (ko) | 2014-01-03 | 2015-07-09 | 삼성전자 주식회사 | 알에프 코일 |
| EP3096153A1 (en) | 2015-05-22 | 2016-11-23 | MRI.Tools GmbH | Rf coil with dielectric material |
| KR101864992B1 (ko) * | 2017-03-09 | 2018-07-04 | 국립암센터 | Mri 노이즈 제거용 조성물 및 이를 이용한 패드 |
| US11275132B2 (en) | 2019-04-08 | 2022-03-15 | Regents Of The University Of Minnesota | Apparatus and method for tuning the permittivity of ultrahigh dielectric constant materials in an RF coil for MR imaging |
| US11543475B2 (en) * | 2019-04-25 | 2023-01-03 | Regents Of The University Of Minnesota | Antenna apparatus including high permittivity materials (HPM) for radio frequency (RF) coils |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151791A (en) * | 1983-12-23 | 1985-07-24 | Gen Electric | RF Field coils for NMR apparatus |
| US4636730A (en) * | 1984-08-16 | 1987-01-13 | General Electric Company | NMR spectroscopy body probes with at least one surface coil |
| US4879515A (en) * | 1988-12-22 | 1989-11-07 | General Electric Company | Double-sided RF shield for RF coil contained within gradient coils of NMR imaging device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3133432A1 (de) * | 1981-08-24 | 1983-03-03 | Siemens AG, 1000 Berlin und 8000 München | Hochfrequenzfeld-einrichtung in einer kernspinresonanz-apparatur |
| US4680548A (en) * | 1984-10-09 | 1987-07-14 | General Electric Company | Radio frequency field coil for NMR |
| DE3616706A1 (de) * | 1986-05-20 | 1987-11-26 | Siemens Ag | Antenneneinrichtung einer kernspintomographie-apparatur zum anregen und/oder empfangen hochfrequenter felder |
| US4751464A (en) * | 1987-05-04 | 1988-06-14 | Advanced Nmr Systems, Inc. | Cavity resonator with improved magnetic field uniformity for high frequency operation and reduced dielectric heating in NMR imaging devices |
| US4799016A (en) * | 1987-07-31 | 1989-01-17 | General Electric Company | Dual frequency NMR surface coil |
| US4820985A (en) * | 1988-04-06 | 1989-04-11 | General Electric Company | Apparatus for tuning an NMR field coil |
| DE3839046A1 (de) * | 1988-11-18 | 1990-05-23 | Bruker Medizintech | Probenkopf fuer die nmr-tomographie |
| 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 |
-
1990
- 1990-01-19 US US07/467,475 patent/US5017872A/en not_active Expired - Fee Related
- 1990-12-07 DE DE19904092430 patent/DE4092430T1/de not_active Ceased
- 1990-12-07 WO PCT/US1990/007208 patent/WO1991010915A1/en active Application Filing
- 1990-12-07 JP JP3502728A patent/JPH0693009B2/ja not_active Expired - Lifetime
-
1992
- 1992-06-15 GB GB9212689A patent/GB2258921A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151791A (en) * | 1983-12-23 | 1985-07-24 | Gen Electric | RF Field coils for NMR apparatus |
| US4636730A (en) * | 1984-08-16 | 1987-01-13 | General Electric Company | NMR spectroscopy body probes with at least one surface coil |
| US4879515A (en) * | 1988-12-22 | 1989-11-07 | General Electric Company | Double-sided RF shield for RF coil contained within gradient coils of NMR imaging device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0693009B2 (ja) | 1994-11-16 |
| JPH04507004A (ja) | 1992-12-03 |
| GB9212689D0 (en) | 1992-11-18 |
| US5017872A (en) | 1991-05-21 |
| WO1991010915A1 (en) | 1991-07-25 |
| GB2258921A (en) | 1993-02-24 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8131 | Rejection |