Methods and apparatus for calibrating CT x-ray beam tracking...

Details Methods and apparatus for calibrating CT x-ray beam tracking... Methods and apparatus for calibrating CT x-ray beam tracking...

2007-08-14

2007-08-14

Glick, Edward J. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

Reexamination Certificate

active

11124331

ABSTRACT:
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.

REFERENCES:
patent: 6327331 (2001-12-01), Toth et al.
patent: 6359958 (2002-03-01), Toth
patent: 6370218 (2002-04-01), Toth et al.
patent: 6385279 (2002-05-01), Toth et al.
patent: 6411677 (2002-06-01), Toth et al.
patent: 6917665 (2005-07-01), Nakanishi et al.

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