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:
Dec. 07, 1999
Filed:
Mar. 27, 1997
Matthew A Bernstein, Waukesha, WI (US);
Xiaohang Zhou, Pewaukee, WI (US);
Kevin F King, New Berlin, WI (US);
Alexander Ganin, Whitefish Bay, WI (US);
Gary H Glover, Stanford, CA (US);
Norbert J Pelc, Los Altos, CA (US);
Jason A Polzin, Lake Mills, WI (US);
General Electric Company, Waukesha, WI (US);
Abstract
A method is presented for correcting Maxwell term error artifacts produced by an NMR system during the production of either a phase contrast angiogram or a complex difference angiogram. Phase corrections are made to the reconstructed phase image to eliminate the artifacts. Correction coefficients calculated from the flow encoding magnetic gradient waveforms of the phase contrast pulse sequence are used in a polynomial to calculate a set of phase error corrections. These corrections are then used to adjust the phase at each pixel of the angiogram image.