The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1992
Filed:
Aug. 07, 1990
Jurgen Hennig, Freiburg, DE;
Spectrospin AG, , CH;
Abstract
In a method for the simultaneous measurement of spin resonance signals, in particular NMR signals, from layers located at different depths in a test volume, simultaneous excitation of the different layers is effected by a multiple-component rf excitation pulse P.sub.n, consisting of n individual components P.sub.m with the frequencies .omega..sub.m, which act selectively on defined layers m of the test volume, in the presence of a layer-selective gradient, the individual components P.sub.m having a phase displacement .phi..sub.m which is varied from one sequence to the next by successive addition of a constant phase increment .DELTA..phi..sub.m modulo 360 fixed individually for each individual component P.sub.m. If phase coding is effected according to the 'Fast Fourier Flow Technique' with the aid of a bipolar gradient pulse, then the flow velocity of a medium moving through the test volume can be measured directly in a multi-dimensional Fourier transformation experiment, simultaneous for several flow cross-sections, in a single recording cycle.