JPH0362410B2 - - Google Patents

Info

Publication number
JPH0362410B2
JPH0362410B2 JP2205346A JP20534690A JPH0362410B2 JP H0362410 B2 JPH0362410 B2 JP H0362410B2 JP 2205346 A JP2205346 A JP 2205346A JP 20534690 A JP20534690 A JP 20534690A JP H0362410 B2 JPH0362410 B2 JP H0362410B2
Authority
JP
Japan
Prior art keywords
digital
frequency
phase
output
input
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 - Lifetime
Application number
JP2205346A
Other languages
English (en)
Japanese (ja)
Other versions
JPH03118044A (ja
Inventor
Suteiibun Sutoomonto Robaato
Fuiritsupu Nuunan Jefurii
Josefu Peruku Nooberuto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of JPH03118044A publication Critical patent/JPH03118044A/ja
Publication of JPH0362410B2 publication Critical patent/JPH0362410B2/ja
Granted legal-status Critical Current

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
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
    • G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency

Landscapes

  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
JP2205346A 1989-08-11 1990-08-03 Ｎｍｒ装置用のｒｆ合成器 Granted JPH03118044A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US392,692 1989-08-11
US07/392,692 US4952877A (en) 1989-08-11 1989-08-11 RF synthesizer or an NMR instrument

Publications (2)

Publication Number Publication Date
JPH03118044A JPH03118044A (ja) 1991-05-20
JPH0362410B2 true JPH0362410B2 (cg-RX-API-DMAC7.html) 1991-09-25

Family

ID=23551628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2205346A Granted JPH03118044A (ja) 1989-08-11 1990-08-03 Ｎｍｒ装置用のｒｆ合成器

Country Status (6)

Country Link
US (1) US4952877A (cg-RX-API-DMAC7.html)
EP (1) EP0412818A3 (cg-RX-API-DMAC7.html)
JP (1) JPH03118044A (cg-RX-API-DMAC7.html)
CA (1) CA2010679A1 (cg-RX-API-DMAC7.html)
FI (1) FI903969A7 (cg-RX-API-DMAC7.html)
IL (1) IL95180A (cg-RX-API-DMAC7.html)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170122A (en) * 1991-07-25 1992-12-08 General Electric NMR imaging using flow compensated SSFP pulse sequences
AU655079B2 (en) * 1991-10-25 1994-12-01 University Of Queensland, The Compensation of pulsed linear magnet field gradient inducted eddy currents in NMR systems
DE69211806T2 (de) * 1991-10-25 1996-10-31 Univ Queensland Korrektur von Signalverzerrungen in einem magnetischen Kernresonanzapparat
US5309104A (en) * 1992-05-22 1994-05-03 General Electric Company Asymmetric radio frequency coil for magnetic resonance imaging
US5367261A (en) * 1992-07-02 1994-11-22 General Electric Company Shield for a magnetic resonance imaging coil
US5309102A (en) * 1993-05-07 1994-05-03 General Electric Company Frequency calibration for MRI scanner
US6294914B1 (en) * 1993-06-02 2001-09-25 The Board Of Trustees Of The University Of Illinois Method of enhancing an MRI signal
US5592085A (en) * 1994-10-19 1997-01-07 Mayo Foundation For Medical Education And Research MR imaging of synchronous spin motion and strain waves
US5825186A (en) * 1994-10-19 1998-10-20 Mayo Foundation For Medical Education And Research Method for producing stiffness-weighted MR images
US5517992A (en) * 1994-12-27 1996-05-21 General Electric Company Magnetic resonance imaging of shear-rate within mechanically vibrated materials
FR2735865B1 (fr) * 1995-06-26 1997-08-22 Centre Nat Rech Scient Dispositif d'analyse quantitative par resonance magnetique nucleaire
JP2002034947A (ja) * 1997-10-24 2002-02-05 Hitachi Ltd マグネット装置、および、これを用いたｍｒｉ装置
US6008648A (en) * 1997-12-04 1999-12-28 General Electric Company Method for producing physical gradient waveforms in magnetic resonance imaging
US6144200A (en) * 1998-02-20 2000-11-07 General Electric Company Acquisition of segmented MRI cardiac data using an EPI pulse sequence
US6046591A (en) * 1998-03-16 2000-04-04 General Electric Company MRI system with fractional decimation of acquired data
US6141578A (en) 1998-04-08 2000-10-31 General Electric Company Method for calculating wave velocities in blood vessels
US6873156B2 (en) * 1998-05-06 2005-03-29 Insight Neuroimaging Systems, Llc Method and apparatus for performing neuroimaging
US6166544A (en) 1998-11-25 2000-12-26 General Electric Company MR imaging system with interactive image contrast control
US6195579B1 (en) 1998-12-18 2001-02-27 Wisconsin Alumni Research Foundation Contrast detection and guided reconstruction in contrast-enhanced magnetic resonance angiography
US6393314B1 (en) 1999-05-06 2002-05-21 General Electric Company RF driven resistive ablation system for use in MRI guided therapy
US6310477B1 (en) 1999-05-10 2001-10-30 General Electric Company MR imaging of lesions and detection of malignant tumors
US6310479B1 (en) 1999-08-20 2001-10-30 General Electric Company Magnetic resonance projection imaging of dynamic subjects
US6242915B1 (en) * 1999-08-27 2001-06-05 General Electric Company Field-frequency lock system for magnetic resonance system
US6490472B1 (en) 1999-09-03 2002-12-03 The Mcw Research Foundation, Inc. MRI system and method for producing an index indicative of alzheimer's disease
US6252405B1 (en) 1999-11-15 2001-06-26 General Electric Company Temperature compensated NMR magnet and method of operation therefor
US6493410B1 (en) * 1999-11-19 2002-12-10 Shiron Satellite Communications (1996) Ltd. Wide band high resolution synthesizer
US6647134B1 (en) * 2000-03-30 2003-11-11 Mayo Foundation For Medical Education And Research Autocorrection of MR projection images
US6529000B2 (en) * 2000-12-29 2003-03-04 Ge Medical Systems Global Technology Company, Llc Method and system for processing magnetic resonance signals to remove transient spike noise
EP1527733A1 (en) 2001-04-09 2005-05-04 Mayo Foundation For Medical Education And Research Of The State Of Minnesota Method for aquiring MRI data from a large field of view using continuous table motion
US6912415B2 (en) 2001-04-09 2005-06-28 Mayo Foundation For Medical Education And Research Method for acquiring MRI data from a large field of view using continuous table motion
JP3884244B2 (ja) * 2001-07-04 2007-02-21 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 Ｒｆ送信回路およびｍｒｉ装置
US6633162B2 (en) 2001-08-22 2003-10-14 Ge Medical Systems Global Technology Company, Llc System and method for filtering frequency encoded imaging signals
US7542793B2 (en) 2002-08-22 2009-06-02 Mayo Foundation For Medical Education And Research MR-guided breast tumor ablation and temperature imaging system
US20050063575A1 (en) * 2003-09-22 2005-03-24 Ge Medical Systems Global Technology, Llc System and method for enabling a software developer to introduce informational attributes for selective inclusion within image headers for medical imaging apparatus applications
JP4021402B2 (ja) * 2003-11-11 2007-12-12 株式会社日立製作所 制御可能な検波部を有する核磁気共鳴装置
EP1999480B1 (en) * 2006-03-24 2015-07-08 The Medical College of Wisconsin, Inc. System and method for direct digitization of nmr signals
US7557575B2 (en) * 2006-04-04 2009-07-07 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus and magnetic resonance imaging method
JP5184049B2 (ja) * 2007-10-30 2013-04-17 株式会社日立製作所 磁気共鳴検査装置及び高周波パルス波形算出方法
US8890528B2 (en) * 2009-09-18 2014-11-18 Analogic Corporation RF power transmitter
US8970217B1 (en) 2010-04-14 2015-03-03 Hypres, Inc. System and method for noise reduction in magnetic resonance imaging
WO2013078518A1 (en) * 2011-12-01 2013-06-06 Gauss Research Laboratory, Inc. Algebraic generators of sequences for communication signals
JP6672345B2 (ja) * 2018-01-24 2020-03-25 アンリツ株式会社 トリガ生成回路及びトリガ生成方法とサンプリングオシロスコープ及びサンプリング方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6096029A (ja) * 1983-10-31 1985-05-29 Anritsu Corp 信号発生器
JPS61745A (ja) * 1984-06-13 1986-01-06 Toshiba Corp 核磁気共鳴装置
FR2592244B1 (fr) * 1985-12-23 1994-05-13 Thomson Csf Synthetiseur numerique de frequences elevees a corrections aperiodiques optimalisant la purete spectrale.
NL8701195A (nl) * 1987-05-19 1988-12-16 Philips Nv M.r.i.-inrichting met digitale zender/ontvanger.
DE3821984A1 (de) * 1988-06-30 1990-04-12 Philips Patentverwaltung Schaltungsanordnung zur erzeugung von hochfrequenzsignalen fuer kernspinuntersuchungen

Also Published As

Publication number Publication date
JPH03118044A (ja) 1991-05-20
EP0412818A2 (en) 1991-02-13
EP0412818A3 (en) 1991-07-24
CA2010679A1 (en) 1991-02-11
US4952877A (en) 1990-08-28
FI903969A7 (fi) 1991-02-12
FI903969A0 (fi) 1990-08-10
IL95180A0 (en) 1991-06-10
IL95180A (en) 1992-12-01

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