Methods and apparatus for reducing z-axis non-uniformity artifac

Details Methods and apparatus for reducing z-axis non-uniformity artifac Methods and apparatus for reducing z-axis non-uniformity artifac

1998-07-13

2000-10-17

Bruce, David V.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 19, 378901, A61B 603

Patent

active

061342920

ABSTRACT:
Methods and apparatus of correcting image data for z-axis non-uniformity in a computed tomography (CT) system are described. In one embodiment, the CT system includes a configurable multislice detector array and a calibration algorithm. In accordance with one embodiment of the algorithm, output signals from a plurality of detector cells are sampled to generate an x-ray beam z-axis non-uniformity profile. The x-ray beam z-axis profile is then used to determine a detector z-axis non-uniformity profile for the detector array. Utilizing the z-axis profiles, the output signals from the detector cells may be calibrated to reduce z-axis non-uniformity errors.

REFERENCES:
patent: 5473656 (1995-12-01), Hsieh et al.
patent: 5734691 (1998-03-01), Hu et al.
patent: 5867553 (1999-02-01), Gordon et al.

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