X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1990-08-27
1991-11-26
Howell, Janice A.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378 9, 378 11, 378 15, G01B 1506
Patent
active
050688820
ABSTRACT:
A configuration of three-dimensional cone beam computerized tomography imaging which minimizes the incompleteness of the data set acquired, while providing fast data acquisition to minimize motion artifacts. An object within a field of view is scanned, preferably simultaneously, along a pair of circular source scanning trajectories spaced a distance selected to minimize the amount of missing data. A procedure is disclosed for calculating the spacing distance between the scanning trajectories which minimizes the amount of missing data. In one embodiment, a pair of cone beam x-ray sources are employed and a corresponding pair of two-dimensional array detectors. In order to reduce interference caused by x-rays from one source interacting with the detector corresponding to the other source, the cone beam x-ray sources are angularly offset, for example by 90.degree..
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Chu Kim-Kwok
Davis Jr. James C.
General Electric Company
Howell Janice A.
Webb II Paul R.
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