FI83820B - Bildtagningsfoerfarande. - Google Patents

Bildtagningsfoerfarande. Download PDF

Info

Publication number
FI83820B
FI83820B FI895651A FI895651A FI83820B FI 83820 B FI83820 B FI 83820B FI 895651 A FI895651 A FI 895651A FI 895651 A FI895651 A FI 895651A FI 83820 B FI83820 B FI 83820B
Authority
FI
Finland
Prior art keywords
magnetization
nmr
imaging
magnetic resonance
pat
Prior art date
Application number
FI895651A
Other languages
English (en)
Finnish (fi)
Other versions
FI895651A0 (fi
FI83820C (sv
Inventor
Raimo Sepponen
Original Assignee
Instrumentarium Oy
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 Instrumentarium Oy filed Critical Instrumentarium Oy
Priority to FI895651A priority Critical patent/FI83820C/sv
Publication of FI895651A0 publication Critical patent/FI895651A0/fi
Priority to US07/574,445 priority patent/US5159270A/en
Priority to DE4032583A priority patent/DE4032583A1/de
Priority to JP2281692A priority patent/JP3015447B2/ja
Application granted granted Critical
Publication of FI83820B publication Critical patent/FI83820B/fi
Publication of FI83820C publication Critical patent/FI83820C/sv

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]
    • G01R33/446—Multifrequency selective RF pulses, e.g. multinuclear acquisition mode
    • 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
    • G01R33/483—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
    • G01R33/4833—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices

Landscapes

  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Claims (2)

1. Förfarande för undersökning av ett objekt sasom en männis-kokropp, ett djur eller en trädstam pa basen av NMR-fenomenet och magnetbildförfarandena, kännetecknat därav, att för astadkommande av NMR-signalen har amplituden för de använda magnetiseringsimpulserna valts sa, att den s.k. maqnetiseringsvinkeln är mindre än 90°' vilken är i och för siq känd, och att mellan dessa maqnetiseringsimoulser underkastas objektet en elektromaqnetisk straining (MTRF) vid en frekvens, som avviker fran resonansfrekvensen för den i obiektets magnet-bild reqistrerade NMR-signalen.
2. Förfarande enligt patentkravet 1, kännetecknat därav, att nämnda magnetiseringsvinkel, nämnda frän den i mag-netbilden registrerande NMR-signalens resonansfrekvens avvikan-de strälningens amplitud, atergivningsavstandet (TR) och eko- fördröjningen (TE) väljes sa, att kontrasten mellan de valda bestandsdelarna i objektet som skall undersökas är i sitt maximum i den uppstaende magnetbilden.
FI895651A 1989-11-27 1989-11-27 Bildtagningsförfarande FI83820C (sv)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FI895651A FI83820C (sv) 1989-11-27 1989-11-27 Bildtagningsförfarande
US07/574,445 US5159270A (en) 1989-11-27 1990-08-28 Imaging method
DE4032583A DE4032583A1 (de) 1989-11-27 1990-10-13 Aufnahmeverfahren
JP2281692A JP3015447B2 (ja) 1989-11-27 1990-10-19 物体組織の検査システム

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI895651A FI83820C (sv) 1989-11-27 1989-11-27 Bildtagningsförfarande
FI895651 1989-11-27

Publications (3)

Publication Number Publication Date
FI895651A0 FI895651A0 (fi) 1989-11-27
FI83820B true FI83820B (fi) 1991-05-15
FI83820C FI83820C (sv) 1991-08-26

Family

ID=8529422

Family Applications (1)

Application Number Title Priority Date Filing Date
FI895651A FI83820C (sv) 1989-11-27 1989-11-27 Bildtagningsförfarande

Country Status (4)

Country Link
US (1) US5159270A (sv)
JP (1) JP3015447B2 (sv)
DE (1) DE4032583A1 (sv)
FI (1) FI83820C (sv)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5304931A (en) * 1991-08-09 1994-04-19 Flamig Duane P Magnetic resonance imaging techniques
US5202631A (en) * 1991-08-09 1993-04-13 Steven E. Harms Magnetic resonance imaging techniques utilizing multiple shaped radiofrequency pulse sequences
US5270652A (en) * 1992-05-20 1993-12-14 North American Philips Corporation MR method and apparatus employing magnetization transfer contrast inducing fat-selective RF pulse
FI95625C (sv) * 1993-03-10 1996-02-26 Picker Nordstar Oy Avbildningsförfarande
US5345175A (en) * 1993-03-16 1994-09-06 Picker International, Inc. Dipolar weighted MR imaging in-vivo
EP0628836B1 (en) * 1993-06-02 1998-09-09 Koninklijke Philips Electronics N.V. Device and a method for magnetic resonance imaging
JP2737608B2 (ja) * 1993-07-31 1998-04-08 株式会社島津製作所 Ｍｒイメージング装置
US8457711B2 (en) * 2007-02-01 2013-06-04 Beth Israel Deaconess Medical Center, Inc. Magnetic resonance imaging of coronary venous structures

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587489A (en) * 1983-10-07 1986-05-06 General Electric Company Method for rapid acquisition of NMR data
DE3504734C2 (de) * 1985-02-12 1998-12-10 Max Planck Gesellschaft Verfahren und Vorrichtung zur Aufnahme von Spinresonanzdaten
NL8502249A (nl) * 1985-06-12 1987-01-02 Koninkl Philips Electronics Nv Mri werkwijze met kleine excitatiepulsen.
DE3538464A1 (de) * 1985-10-29 1987-04-30 Siemens Ag Verfahren zum betrieb eines kernspinresonanzgeraetes fuer die schnelle bestimmung der laengsrelaxationszeit t(pfeil abwaerts)1(pfeil abwaerts)
GB8528357D0 (en) * 1985-11-18 1985-12-24 Picker Int Ltd Nuclear magnetic resonance imaging
DE3637998A1 (de) * 1986-11-07 1988-05-11 Max Planck Gesellschaft Verfahren zur schnellen akquisition von spinresonanzdaten fuer eine ortsaufgeloeste untersuchung eines objekts

Also Published As

Publication number Publication date
FI895651A0 (fi) 1989-11-27
DE4032583A1 (de) 1991-05-29
JP3015447B2 (ja) 2000-03-06
US5159270A (en) 1992-10-27
FI83820C (sv) 1991-08-26
JPH03173529A (ja) 1991-07-26

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Legal Events

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PC Transfer of assignment of patent

Owner name: PICKER NORDSTAR OY

MM Patent lapsed

Owner name: PICKER NORDSTAR OY