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. 27, 1996
Filed:
Nov. 28, 1994
Applicant:
Inventors:
Michael F Gard, Perry, OK (US);
Stephen W Gravelle, Mequon, WI (US);
Jiang Hsieh, Waukesha, WI (US);
Quan N Lu, Milwaukee, WI (US);
John W Newman, Naperville, IL (US);
Thomas L Toth, Brookfield, WI (US);
Michael A Wu, Oro Valley, AZ (US);
Assignee:
General Electric, Waukesha, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
378113 ; 378121 ; 378137 ;
Abstract
Precise alignment of the focal spot position on an x-ray CT system is achieved using a deflection coil that produces a magnetic field which acts on the electron beam path in the x-ray tube. A variable current power supply drives the deflection coil and is controlled by input signals to align the focal spot at a static reference position, to correct for focal spot drift between scans, and to wobble the focal spot position during a scan or between scans.