FI92970B - Metod för att avbilda ett materials rörelse - Google Patents

Metod för att avbilda ett materials rörelse Download PDF

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Publication number
FI92970B
FI92970B FI925465A FI925465A FI92970B FI 92970 B FI92970 B FI 92970B FI 925465 A FI925465 A FI 925465A FI 925465 A FI925465 A FI 925465A FI 92970 B FI92970 B FI 92970B
Authority
FI
Finland
Prior art keywords
pulse
imaging
movement
area
field
Prior art date
Application number
FI925465A
Other languages
English (en)
Finnish (fi)
Other versions
FI92970C (sv
FI925465A (sv
FI925465A0 (sv
Inventor
Raimo Sepponen
Original Assignee
Picker Nordstar 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 Picker Nordstar Oy filed Critical Picker Nordstar Oy
Priority to FI925465A priority Critical patent/FI92970C/sv
Publication of FI925465A0 publication Critical patent/FI925465A0/sv
Priority to US08/158,990 priority patent/US5592084A/en
Publication of FI925465A publication Critical patent/FI925465A/sv
Application granted granted Critical
Publication of FI92970B publication Critical patent/FI92970B/sv
Publication of FI92970C publication Critical patent/FI92970C/sv

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/14—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electron or nuclear magnetic resonance
    • 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
    • G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Geology (AREA)
  • Vascular Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Radiology & Medical Imaging (AREA)
  • Signal Processing (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Claims (3)

1. Förfarande för undersöKning av en materialrörelse under an-vändning av magnetbildtagningsmetoder. kännetecknat därav, att över ett första omräde för objektet (P) bildas ett magnetfält, sedan ett tilläggsfält (B^), som kraftgast över det första omradet och minskande vid objektets förflyttning tili det andra omradet, sedan till undersökningsomradet och att del-vis samtidigt med tilläggsfältet (B^) underkastas objektet en radioirekvent (RF) strälningsimpuls, sedan en AHP-impuls vid en Larmorfrekvens (fQ) motsvararande det i undersökningsomradet rädande magnetfältet och att AHP-impulsens längd (T^p) motsva-rar den tid materialets rörelse frän det första omradet tili undersökningsomradet kräver.
2. Förfarande enligt patentkravet 1, kän netecknat därav, att efter SHP-impulsen underkastas objektet en annan ra-diofrekvent impuls, vilken vrider den transversella kärnmagne-tiseringen i undersökningsomradet för att bilda en longitudi-nell kärnmagnetisering.
3. Förfarande enligt patentkravet 1 eller 2, kännetecknat därav, att de av förfarandet krävda operationer-na synkroniserats med variationerna i materialets rörelsehas-tighet.
FI925465A 1992-12-01 1992-12-01 Metod för att avbilda ett materials rörelse FI92970C (sv)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI925465A FI92970C (sv) 1992-12-01 1992-12-01 Metod för att avbilda ett materials rörelse
US08/158,990 US5592084A (en) 1992-12-01 1993-11-30 Method for imaging of movement of material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI925465 1992-12-01
FI925465A FI92970C (sv) 1992-12-01 1992-12-01 Metod för att avbilda ett materials rörelse

Publications (4)

Publication Number Publication Date
FI925465A0 FI925465A0 (sv) 1992-12-01
FI925465A FI925465A (sv) 1994-06-02
FI92970B true FI92970B (sv) 1994-10-31
FI92970C FI92970C (sv) 1995-02-10

Family

ID=8536308

Family Applications (1)

Application Number Title Priority Date Filing Date
FI925465A FI92970C (sv) 1992-12-01 1992-12-01 Metod för att avbilda ett materials rörelse

Country Status (2)

Country Link
US (1) US5592084A (sv)
FI (1) FI92970C (sv)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3028220B2 (ja) * 1998-05-21 2000-04-04 ジーイー横河メディカルシステム株式会社 Ｍｒｉ装置
WO2023081228A1 (en) * 2021-11-08 2023-05-11 The Johns Hopkins University Balanced force shim coil array

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1052861A (en) * 1975-03-18 1979-04-17 Varian Associates Gyromagnetic resonance fourier transform zeugmatography
FI75701C (sv) * 1983-04-22 1988-07-11 Instrumentarium Oy Kontrollerad strömkälla.
DE3504734C2 (de) * 1985-02-12 1998-12-10 Max Planck Gesellschaft Verfahren und Vorrichtung zur Aufnahme von Spinresonanzdaten
GB8528357D0 (en) * 1985-11-18 1985-12-24 Picker Int Ltd Nuclear magnetic resonance imaging
US5151655A (en) * 1990-02-23 1992-09-29 Baylor Research Institute Magnetic resonance imaging using a back-to-back pulse sequence
US5262724A (en) * 1990-05-29 1993-11-16 Instrumentarium Corp. Examination method and apparatus
US5122748A (en) * 1990-08-13 1992-06-16 The Trustees Of Columbia University In The City Of New York Method and apparatus for spatial localization of magnetic resonance signals
JPH05228127A (ja) * 1992-02-26 1993-09-07 Toshiba Corp 磁気共鳴イメージング装置

Also Published As

Publication number Publication date
FI92970C (sv) 1995-02-10
FI925465A (sv) 1994-06-02
US5592084A (en) 1997-01-07
FI925465A0 (sv) 1992-12-01

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Legal Events

Date Code Title Description
GB Transfer or assigment of application

Owner name: PICKER NORDSTAR OY

BB Publication of examined application