FI911421A - Gradientfoerstaerkarsystem vari foerstaerkarna anvaends flexibelt. - Google Patents
Gradientfoerstaerkarsystem vari foerstaerkarna anvaends flexibelt. Download PDFInfo
- Publication number
- FI911421A FI911421A FI911421A FI911421A FI911421A FI 911421 A FI911421 A FI 911421A FI 911421 A FI911421 A FI 911421A FI 911421 A FI911421 A FI 911421A FI 911421 A FI911421 A FI 911421A
- Authority
- FI
- Finland
- Prior art keywords
- gradientfoerstaerkarsystem
- foerstaerkarna
- flexibelt
- anvaends
- vari
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/217—Class D power amplifiers; Switching amplifiers
- H03F3/2178—Class D power amplifiers; Switching amplifiers using more than one switch or switching amplifier in parallel or in series
-
- 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
- G01R33/3852—Gradient amplifiers; means for controlling the application of a gradient magnetic field to the sample, e.g. a gradient signal synthesizer
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/261—Amplifier which being suitable for instrumentation applications
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/498,731 US5066914A (en) | 1990-03-26 | 1990-03-26 | Gradient amplifier system with flexible amplifier allocation |
Publications (2)
Publication Number | Publication Date |
---|---|
FI911421A0 FI911421A0 (fi) | 1991-03-25 |
FI911421A true FI911421A (fi) | 1991-09-27 |
Family
ID=23982272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI911421A FI911421A (fi) | 1990-03-26 | 1991-03-25 | Gradientfoerstaerkarsystem vari foerstaerkarna anvaends flexibelt. |
Country Status (6)
Country | Link |
---|---|
US (1) | US5066914A (fi) |
EP (1) | EP0454298A3 (fi) |
JP (1) | JPH0618563B2 (fi) |
CA (1) | CA2034477A1 (fi) |
FI (1) | FI911421A (fi) |
IL (1) | IL97518A0 (fi) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0533786A4 (en) | 1990-06-13 | 1993-07-21 | Advanced Nmr Systems, Inc. | Circuitry for driving field-generating coil of magnetic resonance imaging system |
US5569266A (en) * | 1991-03-11 | 1996-10-29 | Fischer Imaging Corporation | Magnetic resonance imaging device useful for guiding a medical instrument |
JP3431654B2 (ja) * | 1992-03-23 | 2003-07-28 | ゼネラル・エレクトリック・カンパニイ | 線形増幅器と直流電源の組み合わせを用いる勾配増幅システム |
US5270657A (en) * | 1992-03-23 | 1993-12-14 | General Electric Company | Split gradient amplifier for an MRI system |
US5442290A (en) * | 1992-08-04 | 1995-08-15 | The Regents Of The University Of California | MRI gradient drive current control using all digital controller |
DE4304517C2 (de) * | 1993-02-15 | 2002-12-19 | Siemens Ag | Stromversorgung für vorwiegend induktive Lasten |
US5399969A (en) * | 1993-08-05 | 1995-03-21 | General Electric Company | Analyzer of gradient power usage for oblique MRI imaging |
US5721490A (en) * | 1995-02-09 | 1998-02-24 | Hitachi Medical Corporation | Power source apparatus including a plurality of output current amplifiers connected in parallel and MRI apparatus using the same |
DE19527150A1 (de) * | 1995-07-25 | 1997-01-30 | Siemens Ag | Magnetresonanzgerät mit einer supraleitenden Spulenanordnung |
DE19706756C2 (de) * | 1997-02-20 | 2001-08-09 | Siemens Ag | Gradientenverstärker für einen Kernspintomographen und Kernspintomograph |
JP3595153B2 (ja) * | 1998-03-03 | 2004-12-02 | 株式会社 日立ディスプレイズ | 液晶表示装置および映像信号線駆動手段 |
DE19928428C2 (de) * | 1999-06-23 | 2001-07-26 | Siemens Ag | Hochfrequenzempfangsanordnung für ein Magnetresonanzgerät |
US6552448B1 (en) * | 1999-09-08 | 2003-04-22 | Harman International Industries, Incorporated | Energy management system for series connected amplifiers |
US6323649B1 (en) * | 1999-09-14 | 2001-11-27 | Picker International, Inc. | Modular MRI gradient amplifier using unipolar PWM drive |
US6920312B1 (en) | 2001-05-31 | 2005-07-19 | Lam Research Corporation | RF generating system with fast loop control |
US7112963B2 (en) * | 2003-04-11 | 2006-09-26 | Jeol Ltd. | NMR measurement method |
ITBO20050260A1 (it) * | 2005-04-20 | 2006-10-21 | Ocem Spa | Metodo per la modulazione di una tensione |
US7600634B2 (en) * | 2006-04-03 | 2009-10-13 | Tyco Healthcare Group Lp | Packaging for surgical sutures |
JP4773264B2 (ja) * | 2006-05-10 | 2011-09-14 | パナソニック株式会社 | モータ駆動装置 |
US7535230B2 (en) * | 2007-03-08 | 2009-05-19 | Kabushiki Kaisha Toshiba | Magnetic resonance imaging apparatus and magnetic resonance imaging method |
JP5379997B2 (ja) * | 2007-05-01 | 2013-12-25 | 株式会社東芝 | 磁気共鳴撮像装置および磁気共鳴撮像方法 |
WO2010025114A1 (en) | 2008-08-25 | 2010-03-04 | Applied Magnetics, Llc | Systems and methods for providing a magnetic resonance treatment to a subject |
KR20130020422A (ko) * | 2011-08-19 | 2013-02-27 | 삼성전자주식회사 | 자기공명영상장치, 자기공명영상장치용 증폭기 및 이를 제어하는 방법 |
JP6427582B2 (ja) * | 2014-01-03 | 2018-11-21 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | 環境データを用いた勾配磁場コイル増幅器故障の確率の計算 |
DE102015202670B4 (de) * | 2015-02-13 | 2018-11-22 | Siemens Healthcare Gmbh | Magnetresonanzvorrichtung mit einer Schaltmatrixeinheit und ein Verfahren zur Pulssequenzoptimierung sowie ein Computerprogrammprodukt |
US10361554B1 (en) * | 2016-09-27 | 2019-07-23 | Altera Corporation | Techniques for determining inductances |
US10571538B2 (en) | 2018-06-01 | 2020-02-25 | General Electric Company | Diagnostic device and method for diagnosing a faulty condition in a gradient amplifier system |
EP3779495B1 (de) * | 2019-08-16 | 2023-10-11 | Siemens Healthcare GmbH | Bildgebungssystem umfassend ein gradientensystem mit flexibler gradientenverstärkereinheit |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3808545A (en) * | 1972-10-04 | 1974-04-30 | Int Radio & Electronics Corp | High power bridge audio amplifier |
US4322684A (en) * | 1978-11-16 | 1982-03-30 | E M I Limited | Imaging systems |
NL8105371A (nl) * | 1981-11-27 | 1983-06-16 | Philips Nv | Inrichting voor het aansturen van een of meer omzeteenheden. |
US4613949A (en) * | 1984-02-17 | 1986-09-23 | General Electric Company | Composite pulses for time reversal in NMR imaging |
US4710716A (en) * | 1985-09-20 | 1987-12-01 | Elscint Ltd. | Slice orientation selection arrangement |
US4680545A (en) * | 1985-01-04 | 1987-07-14 | General Electric Company | Method for reduction of acoustical noise generated by magnetic field gradient pulses |
US4680547A (en) * | 1985-06-10 | 1987-07-14 | General Electric Company | Gradient field switch for improved magnetic resonance imaging/spectroscopy system |
DE3530637A1 (de) * | 1985-08-28 | 1987-03-12 | Philips Patentverwaltung | Schaltungsanordnung mit einer an den ausgang eines verstaerkers angeschlossenen last |
EP0250718A1 (de) * | 1986-06-30 | 1988-01-07 | Siemens Aktiengesellschaft | Stromversorgung für einen induktiven Verbraucher, insbesondere eine Gradientenspule, mit Steuer- und Regeleinrichtung |
IL82030A (en) * | 1987-03-27 | 1990-11-05 | Elscint Ltd | Separation of spectral components |
JP2646627B2 (ja) * | 1988-03-08 | 1997-08-27 | 株式会社日立製作所 | 核磁気共鳴を用いた検査装置 |
US4901020A (en) * | 1988-05-30 | 1990-02-13 | Siemens Aktiengesellschaft | Pulse sequence for operating a nuclear magnetic resonance tomography apparatus for producing images with different T2 contrast |
US4933639A (en) * | 1989-02-13 | 1990-06-12 | The Board Of Regents, The University Of Texas System | Axis translator for magnetic resonance imaging |
-
1990
- 1990-03-26 US US07/498,731 patent/US5066914A/en not_active Expired - Fee Related
-
1991
- 1991-01-17 CA CA002034477A patent/CA2034477A1/en not_active Abandoned
- 1991-03-12 IL IL97518A patent/IL97518A0/xx not_active IP Right Cessation
- 1991-03-15 EP EP19910302248 patent/EP0454298A3/en not_active Withdrawn
- 1991-03-25 JP JP3082919A patent/JPH0618563B2/ja not_active Expired - Lifetime
- 1991-03-25 FI FI911421A patent/FI911421A/fi not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
JPH0618563B2 (ja) | 1994-03-16 |
FI911421A0 (fi) | 1991-03-25 |
EP0454298A3 (en) | 1992-03-11 |
JPH04297230A (ja) | 1992-10-21 |
IL97518A0 (en) | 1992-06-21 |
US5066914A (en) | 1991-11-19 |
CA2034477A1 (en) | 1991-09-27 |
EP0454298A2 (en) | 1991-10-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD | Application lapsed |