Patent Number: 6,298,117

Title: Variable aperture z-axis tracking collimator for a computed tomograph system

Abstract: Methods and apparatus for dose reduction in a computed tomography (CT) system are described. In one embodiment, the CT system includes a pre-patient collimator and a configurable multislice detector array. The pre-patient collimator includes a plurality of eccentric cams and a filtration device for altering the x-ray beam radiated from a x-ray source. The eccentric cams are positioned to collimate the x-ray beam and may be independently positioned to provide z-axis correction of the x-ray beam. The filtration device includes a plurality of filters for altering the x-ray beam. In operation, an operator selects the type of test and the quantity and thickness of the slices. After altering the detector and collimator configuration, slice data for each slice is gathered.

Inventors: Hampel; Willi W. (St. Francis, WI), Hum; Russell W. (Waukesha, WI), Vara, Jr.; Carmine F. (New Berlin, WI), Woloschek; Steven J. (Franklin, WI)

Assignee: General Electric Company

International Classification: A61B 6/06 (20060101); A61B 6/03 (20060101); A61B 006/03 ()

Expiration Date: 10/02/2018