WO2012117350A1 - Magnetic resonance using quasi-continuous rf irradiation - Google Patents
Magnetic resonance using quasi-continuous rf irradiation Download PDFInfo
- Publication number
- WO2012117350A1 WO2012117350A1 PCT/IB2012/050929 IB2012050929W WO2012117350A1 WO 2012117350 A1 WO2012117350 A1 WO 2012117350A1 IB 2012050929 W IB2012050929 W IB 2012050929W WO 2012117350 A1 WO2012117350 A1 WO 2012117350A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pulse
- power amplifiers
- signals
- power
- imaging
- Prior art date
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Classifications
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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
-
- 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
-
- 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
- G01R33/3614—RF power amplifiers
-
- 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
- G01R33/5605—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by transferring coherence or polarization from a spin species to another, e.g. creating magnetization transfer contrast [MTC], polarization transfer using nuclear Overhauser enhancement [NOE]
-
- 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
- G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
- G01R33/5611—Parallel magnetic resonance imaging, e.g. sensitivity encoding [SENSE], simultaneous acquisition of spatial harmonics [SMASH], unaliasing by Fourier encoding of the overlaps using the temporal dimension [UNFOLD], k-t-broad-use linear acquisition speed-up technique [k-t-BLAST], k-t-SENSE
- G01R33/5612—Parallel RF transmission, i.e. RF pulse transmission using a plurality of independent transmission channels
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- High Energy & Nuclear Physics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2013144324/28A RU2577254C2 (en) | 2011-03-03 | 2012-02-28 | Quasi-continuous rf magnetic resonance imaging |
EP12708952.2A EP2681578B1 (en) | 2011-03-03 | 2012-02-28 | Magnetic resonance using quasi-continuous rf irradiation |
US14/002,549 US9547060B2 (en) | 2011-03-03 | 2012-02-28 | Magnetic resonance using quazi-continuous RF irradiation |
BR112013022100A BR112013022100A2 (en) | 2011-03-03 | 2012-02-28 | rm image method of at least a part of a body, rm spectroscopy method of an object, rm device for performing the method and computer program to be performed on an rm device |
CN201280011610.0A CN103443644B (en) | 2011-03-03 | 2012-02-28 | Use the magnetic resonance of quasi-continuous RF irradiation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11156742.6 | 2011-03-03 | ||
EP11156742 | 2011-03-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012117350A1 true WO2012117350A1 (en) | 2012-09-07 |
Family
ID=45833488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2012/050929 WO2012117350A1 (en) | 2011-03-03 | 2012-02-28 | Magnetic resonance using quasi-continuous rf irradiation |
Country Status (6)
Country | Link |
---|---|
US (1) | US9547060B2 (en) |
EP (1) | EP2681578B1 (en) |
CN (1) | CN103443644B (en) |
BR (1) | BR112013022100A2 (en) |
RU (1) | RU2577254C2 (en) |
WO (1) | WO2012117350A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014098628A1 (en) * | 2012-12-21 | 2014-06-26 | Board & Batten International Inc | Method and system of measuring an activity of a person on a flexible mat of a trampoline |
CN104142484A (en) * | 2013-05-08 | 2014-11-12 | 西门子公司 | Method for rf excitation with two resonance frequencies to detect the cest effect |
WO2017032696A1 (en) * | 2015-08-21 | 2017-03-02 | Koninklijke Philips N.V. | Generation of rf signals for excitation of nuclei in magnetic resonance systems |
WO2017108874A1 (en) * | 2015-12-24 | 2017-06-29 | Koninklijke Philips N.V. | A device and method for driving a transmit coil in a magnetic resonance imaging system |
US20220326326A1 (en) * | 2020-09-25 | 2022-10-13 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for magnetic resonance imaging |
Families Citing this family (10)
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---|---|---|---|---|
CN103282789B (en) * | 2011-01-06 | 2016-09-14 | 皇家飞利浦电子股份有限公司 | Multichannel launches MR imaging |
EP2515138A1 (en) * | 2011-04-19 | 2012-10-24 | Koninklijke Philips Electronics N.V. | Motion triggered MR imaging using APT/CEST |
CN102565733B (en) * | 2011-12-12 | 2014-07-16 | 中国科学院深圳先进技术研究院 | Magnetic resonance multi-core array radio frequency device and magnetic resonance signal receiving method |
US9335393B2 (en) * | 2012-09-13 | 2016-05-10 | Siemens Medical Solutions Usa, Inc. | MR parallel imaging system reducing imaging time |
JP6618988B2 (en) * | 2015-03-06 | 2019-12-11 | 株式会社日立製作所 | Magnetic resonance imaging apparatus and RF shimming parameter setting method |
US10718841B2 (en) | 2016-01-14 | 2020-07-21 | Beth Israel Deaconess Medical Center, Inc. | System and method for improved homogeneous and inhomogeneous magnetization transfer magnetic resonance imaging |
US10794971B2 (en) * | 2017-03-27 | 2020-10-06 | Waveguide Corporation | Duty-cycle control for power-level adjustment in switch-mode power amplifiers |
JP6867857B2 (en) * | 2017-04-24 | 2021-05-12 | 株式会社日立製作所 | Magnetic resonance imaging device |
EP4016104A1 (en) * | 2020-12-16 | 2022-06-22 | Siemens Healthcare GmbH | Method and system for controlling a magnetic resonance imaging system using overlapping rf pulses |
WO2023101796A1 (en) * | 2021-12-01 | 2023-06-08 | The Johns Hopkins University | Quantification of fluid-tissue exchange using phase alternate labeling with null recovery mri |
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US6962769B2 (en) | 2001-04-17 | 2005-11-08 | Brewer Science Inc. | Anti-reflective coating composition with improved spin bowl compatibility |
US6975114B1 (en) * | 2002-11-20 | 2005-12-13 | Nova Medical, Inc. | Methods for transmit excitation in magnetic resonance imaging using a transmit pulse with time varying spatial characteristics |
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2012
- 2012-02-28 WO PCT/IB2012/050929 patent/WO2012117350A1/en active Application Filing
- 2012-02-28 BR BR112013022100A patent/BR112013022100A2/en not_active IP Right Cessation
- 2012-02-28 US US14/002,549 patent/US9547060B2/en active Active
- 2012-02-28 RU RU2013144324/28A patent/RU2577254C2/en active
- 2012-02-28 CN CN201280011610.0A patent/CN103443644B/en active Active
- 2012-02-28 EP EP12708952.2A patent/EP2681578B1/en active Active
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014098628A1 (en) * | 2012-12-21 | 2014-06-26 | Board & Batten International Inc | Method and system of measuring an activity of a person on a flexible mat of a trampoline |
CN104142484A (en) * | 2013-05-08 | 2014-11-12 | 西门子公司 | Method for rf excitation with two resonance frequencies to detect the cest effect |
DE102013208475A1 (en) * | 2013-05-08 | 2014-11-13 | Siemens Aktiengesellschaft | RF excitation with two resonance frequencies for the detection of the CEST effect by means of a magnetic resonance system |
DE102013208475B4 (en) * | 2013-05-08 | 2014-11-27 | Siemens Aktiengesellschaft | RF excitation with two resonance frequencies for the detection of the CEST effect by means of a magnetic resonance system |
US9599691B2 (en) | 2013-05-08 | 2017-03-21 | Siemens Aktiengesellschaft | Magnetic resonance apparatus and method for RF excitation with two resonance frequencies to detect the CEST effect |
CN104142484B (en) * | 2013-05-08 | 2017-06-09 | 西门子公司 | With two HF motivational techniques of resonant frequency, the method and apparatus of collection MR data |
WO2017032696A1 (en) * | 2015-08-21 | 2017-03-02 | Koninklijke Philips N.V. | Generation of rf signals for excitation of nuclei in magnetic resonance systems |
WO2017108874A1 (en) * | 2015-12-24 | 2017-06-29 | Koninklijke Philips N.V. | A device and method for driving a transmit coil in a magnetic resonance imaging system |
US20220326326A1 (en) * | 2020-09-25 | 2022-10-13 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for magnetic resonance imaging |
Also Published As
Publication number | Publication date |
---|---|
EP2681578A1 (en) | 2014-01-08 |
US9547060B2 (en) | 2017-01-17 |
US20130342207A1 (en) | 2013-12-26 |
RU2013144324A (en) | 2015-04-10 |
BR112013022100A2 (en) | 2016-12-06 |
EP2681578B1 (en) | 2020-01-08 |
RU2577254C2 (en) | 2016-03-10 |
CN103443644B (en) | 2016-03-30 |
CN103443644A (en) | 2013-12-11 |
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