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:
Nov. 09, 1993
Filed:
Mar. 31, 1992
David G Cory, Boston, MA (US);
Bruker Instruments, Inc., Billerica, MA (US);
Abstract
In an NMR solid-state imaging experiment, second averaging is carried out during the experiment to reduce the effects of unwanted interactions that obscure the results of an interaction of interest. The second averaging is arranged so that the second averaging interaction and the interaction of interest are along the same axis, but are separated in time. The second averaging interaction is further designed to introduce a multiple of .pi./2 phase offset between applications of the interaction of interest. In this way, even when the sum of the actual resonance frequency and the second averaging frequency are zero, the spin dynamics are still modulated and a second averaging takes place. An additional advantage is provided in that the resonance frequency can be sampled in such a fashion that the second averaging frequency does not appear in the observed resonance frequency.