FI903407A0 - Accelerationskrets foer gradientstroem vid ett snabbt nmr-avbildningssystem. - Google Patents
Accelerationskrets foer gradientstroem vid ett snabbt nmr-avbildningssystem.Info
- Publication number
- FI903407A0 FI903407A0 FI903407A FI903407A FI903407A0 FI 903407 A0 FI903407 A0 FI 903407A0 FI 903407 A FI903407 A FI 903407A FI 903407 A FI903407 A FI 903407A FI 903407 A0 FI903407 A0 FI 903407A0
- Authority
- FI
- Finland
- Prior art keywords
- gradientstroem
- avbildningssystem
- accelerationskrets
- snabbt
- foer
- Prior art date
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
- G01R33/38—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
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/376,074 US4961054A (en) | 1989-07-06 | 1989-07-06 | Gradient current speed-up circuit for high-speed NMR imaging system |
Publications (1)
Publication Number | Publication Date |
---|---|
FI903407A0 true FI903407A0 (fi) | 1990-07-05 |
Family
ID=23483603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI903407A FI903407A0 (fi) | 1989-07-06 | 1990-07-05 | Accelerationskrets foer gradientstroem vid ett snabbt nmr-avbildningssystem. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4961054A (fi) |
EP (1) | EP0407195A3 (fi) |
JP (1) | JPH03106334A (fi) |
FI (1) | FI903407A0 (fi) |
IL (1) | IL94814A0 (fi) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5451875A (en) * | 1989-06-16 | 1995-09-19 | Picker International, Inc. | Technique for reducing aliasing artifacts wtih insertable gradient coils |
US5406205A (en) * | 1989-11-08 | 1995-04-11 | Bruker Analytische Messtechnik Gmbh | Gradient-generation system, nuclear spin tomograph, and process for the generation of images with a nuclear-spin tomograph |
US5105153A (en) * | 1990-06-04 | 1992-04-14 | General Electric Company | Gradient speed-up circuit for nmr system |
US5063349A (en) * | 1990-06-04 | 1991-11-05 | General Electric Company | Transformer-coupled gradient speed-up circuit |
DE4127529C2 (de) * | 1991-08-20 | 1995-06-08 | Siemens Ag | Verfahren zum Betrieb eines Kernspintomographiegeräts mit einem Resonanzkreis zur Erzeugung von Gradientenfeldern |
US5291890A (en) * | 1991-08-29 | 1994-03-08 | General Electric Company | Magnetic resonance surgery using heat waves produced with focussed ultrasound |
JPH05269102A (ja) * | 1991-11-28 | 1993-10-19 | Toshiba Corp | 傾斜磁場アンプ装置 |
US5368031A (en) * | 1993-08-29 | 1994-11-29 | General Electric Company | Magnetic resonance surgery using heat waves produced with a laser fiber |
US6552448B1 (en) | 1999-09-08 | 2003-04-22 | Harman International Industries, Incorporated | Energy management system for series connected amplifiers |
DE10030566C2 (de) * | 2000-06-21 | 2002-09-12 | Rossendorf Forschzent | Schaltungsanordnung zur Erzeugung positiver und negativer pulsförmiger Magnetfelder |
US6920312B1 (en) | 2001-05-31 | 2005-07-19 | Lam Research Corporation | RF generating system with fast loop control |
US9389288B2 (en) * | 2012-09-14 | 2016-07-12 | General Electric Company | System and method for maintaining soft switching condition in a gradient coil driver circuit |
DE102017213197B3 (de) | 2017-07-31 | 2018-10-31 | Bruker Biospin Gmbh | Endstufe zur Erzeugung variabler, rechteckförmiger Ströme in einer induktiven Last ohne Hochspannungsversorgung |
WO2019226624A1 (en) | 2018-05-21 | 2019-11-28 | Hyperfine Research, Inc. | Radio-frequency coil signal chain for a low-field mri system |
CN112684392A (zh) * | 2019-10-19 | 2021-04-20 | 惠仁望都医疗设备科技有限公司 | 一种非平面梯度线圈的设计方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI75701C (fi) * | 1983-04-22 | 1988-07-11 | Instrumentarium Oy | Kontrollerad stroemkaella. |
JPS6046786A (ja) * | 1983-08-22 | 1985-03-13 | Secoh Giken Inc | 直流電動機のソフト加減速装置 |
DE3336286A1 (de) * | 1983-10-05 | 1985-04-18 | Siemens AG, 1000 Berlin und 8000 München | Geraet zur erzeugung von bildern eines untersuchungsobjektes mit magnetischer kernresonanz |
DE3614155C2 (de) * | 1985-05-03 | 1994-09-01 | British Tech Group | Funktionsgenerator für NMR-Geräte |
US4667159A (en) * | 1985-06-10 | 1987-05-19 | General Electric Company | Method of, and apparatus for, minimizing magnetic resonance imaging artifacts due to power line interference |
GB8530930D0 (en) * | 1985-12-16 | 1986-01-29 | Mansfield P | Inductive circuit arrangements |
EP0250718A1 (de) * | 1986-06-30 | 1988-01-07 | Siemens Aktiengesellschaft | Stromversorgung für einen induktiven Verbraucher, insbesondere eine Gradientenspule, mit Steuer- und Regeleinrichtung |
-
1989
- 1989-07-06 US US07/376,074 patent/US4961054A/en not_active Expired - Fee Related
-
1990
- 1990-06-21 IL IL94814A patent/IL94814A0/xx not_active IP Right Cessation
- 1990-07-05 EP EP19900307360 patent/EP0407195A3/en not_active Withdrawn
- 1990-07-05 FI FI903407A patent/FI903407A0/fi not_active IP Right Cessation
- 1990-07-06 JP JP2177637A patent/JPH03106334A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH03106334A (ja) | 1991-05-02 |
US4961054A (en) | 1990-10-02 |
JPH0419853B2 (fi) | 1992-03-31 |
IL94814A0 (en) | 1991-04-15 |
EP0407195A2 (en) | 1991-01-09 |
EP0407195A3 (en) | 1991-05-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD | Application lapsed | ||
MM | Patent lapsed |
Owner name: GENERAL ELECTRIC COMPANY |