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:
Aug. 07, 2001
Filed:
May. 21, 1999
Anton M. Linz, Mukwonago, WI (US);
Kevin F. King, New Berlin, WI (US);
General Electric Company, Schnectady, NY (US);
Abstract
The present invention, in one form, provides compensation for the effects of an oscillatory B0 eddy current B,(t) in an NMR apparatus. In an NMR apparatus having a transmitter generating a spin excitation signal and a receiver detecting an NMR signal, applied gradient signals are analyzed to estimate a resulting oscillatory B0 eddy current B,(t). The frequency of either the transmitter or the receiver of the NMR apparatus, or both, is shifted in frequency by an amount proportional to B,(t) to achieve compensation. The applied gradient signals are digitized and filtered using a recursive filter that is based upon an oscillatory model of the oscillatory B0 eddy current B,(t)