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:
Jun. 26, 2001
Filed:
Aug. 13, 1999
Applicant:
Inventors:
Larry Y. L. Mo, Waukesha, WI (US);
Richard M. Kulakowski, Richfield, WI (US);
Assignee:
General Electric Company, Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B 8/06 ;
U.S. Cl.
CPC ...
A61B 8/06 ;
Abstract
A method and an apparatus for suppressing background noise in spectral Doppler imaging using adaptive noise-reduction low-pass filters. A pair of adaptive low-pass filters are arranged in the two audio Doppler channels for suppressing background noise in the audio Doppler data. The low-pass filtering can be implemented in the frequency domain, i.e., before the IFFT operation, or in the time domain, i.e., after the IFFT operation. Maximum frequency traces are fed into a filter selection block which prescribes the filter cutoffs of the low-pass filters.