Normalizing projection data in a computed tomography system

Details Normalizing projection data in a computed tomography system Normalizing projection data in a computed tomography system

1996-12-02

1998-06-02

Wong, Don

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, G01N 2300

Patent

active

057612579

ABSTRACT:
The present invention, in one form, is a method for detecting reference channel blockage in a computed tomography system. The system includes an x-ray source, a detector and a reference channel. When scanning an object of interest, the x-ray source is supplied with an x-ray source current and projects an x-ray beam toward the detector and the reference channel. The detector, when impinged by the x-ray beam, generates projection data for reconstructing an image of the object of interest. The reference channel is configured to generate an actual reference channel signal when impinged by the x-ray beam. An expected reference signal is determined in accordance with the x-ray source current. The expected reference signal is then utilized to normalize the projection data.

REFERENCES:
patent: 5430785 (1995-07-01), Pfoh et al.

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