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1. (WO1991000529) NUCLEAR MAGNETIC RESONANCE IMAGING METHODS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/000529 International Application No.: PCT/GB1990/000967
Publication Date: 10.01.1991 International Filing Date: 22.06.1990
Chapter 2 Demand Filed: 07.01.1991
IPC:
G01R 33/54 (2006.01)
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
44
using nuclear magnetic resonance (NMR)
48
NMR imaging systems
54
Signal processing systems, e.g. using pulse sequences
Applicants:
NATIONAL RESEARCH DEVELOPMENT CORPORATION [GB/GB]; 101 Newington Causeway London SE1 6BU, GB (AllExceptUS)
McDONALD, Peter, John [GB/GB]; GB (UsOnly)
TOKARCZUK, Pawel, Franciszek [GB/GB]; GB (UsOnly)
Inventors:
McDONALD, Peter, John; GB
TOKARCZUK, Pawel, Franciszek; GB
Agent:
DAVIS, Norman, Norbridge; Patent Department National Research Development Corporation 101 Newington Causeway London SE1 6BU, GB
Priority Data:
8914467.923.06.1989GB
Title (EN) NUCLEAR MAGNETIC RESONANCE IMAGING METHODS
(FR) METHODES D'IMAGERIE PAR RESONANCE MAGNETIQUE NUCLEAIRE
Abstract:
(EN) To derive NMR imaging information an object is subjected to a static magnetic field on which is superimposed a sinusoidally time varying magnetic gradient field. A sequence of narrow 90° rf pulses are applied around the instants when the gradient field has a zero value. The rf pulses have relative phase quadrature such that excited nuclei precess with accumulated phase in each sequence.
(FR) Pour obtenir l'information relative à l'imagerie par RMN, un objet est soumis à un champ magnétique statique sur lequel on surimpose un champ de gradient magnétique variant de manière sinusoïdale avec le temps. Une séquence d'impulsions de fréquences radio étroites à 90° est émise aux moments où le champ de gradient a une valeur zéro. Les impulsions de fréquence radio ont une quadrature de phase relative de sorte que les noyaux excités présentent de la précession avec la phase accumulée dans chaque séquence.
Designated States: JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0478632US5254949DE000069030002GB2234594