Title: Methods and apparatus for calibrating ct x-ray beam tracking loop
Application Number: 200610077842 Application Date: 2006.05.08
Publication Number: 1857163 Publication Date: 2006.11.08
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: A61B6/03,G01N23/04,G01T1/00
Applicant(s) Name: Gen Electric Address:
Inventor(s) Name: Chao Edward Henry, Toth Thomas Louis
Attorney & Agent: liu gong wang zhongzhong
Abstract:
     The present invention provides a method for determining tracking control parameters for positioning an x-ray beam of a computed tomography imaging system, the imaging system including a movable collimator positionable in steps and a detector array including a plurality of detector elements arranged in rows and channels, the rows extending from a detector A-side to a detector B-side. The method includes determining a detector A-side and a detector B-side target beam penumbra position, computing a plurality of Z-ratio curves corresponding to different detector rows and detector channels, and comparing the Z-ratio curves at the detector A-side and detector B-side target beam positions to determine the optimal Z-ratio curve and corresponding detector channels and rows for controlling the X-ray beam positioning.
Time: 9
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