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US 5,510,622 AGranted
X-ray detector array with reduced effective pitch
AssigneeGeneral Electric Company
InventorsHui Hu, Stanley Fox, Thomas L. Toth, Thaddeus Ulijasz, Armin H. Pfoh
Life of this patent
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Abstract
Image artifacts are reduced in a volumetric CT scanner system by decreasing the detector pitch along one or both dimensions of a 2D detector array. Four different embodiments for reducing detector pitch without reducing the size of each detector element are disclosed.
Claims5
A detector array for an x-ray volumetric CT system which produces a cone beam of x-rays, which comprises:
- a plurality of quadrilateral-shaped detector elements arranged in a two-dimensional array to simultaneously sense the x-rays in the cone beam and produce corresponding electrical signals, with the centers of the detector elements aligned along a plurality of adjacent straight lines to form a corresponding plurality of columns, and with the detector elements in alternate columns being positioned such that their centers are staggered midway between the centers of detector elements in adjacent columns.
A detector array for an x-ray volumetric CT system, which comprises:
- plurality of quadrilateral-shaped detector elements arranged with their centers aligned along a plurality of adjacent straight lines to form a corresponding plurality of columns, and with the detector elements in alternate columns being positioned such that their centers are staggered midway between the centers of detector elements in adjacent columns;
- in which the detector elements are square-shaped and their centers are also aligned along a plurality of adjacent straight lines to form a corresponding plurality of rows that are perpendicular to the columns.
A detector array for an x-ray volumetric CT system, which comprises:
- a plurality of quadrilateral-shaped detector elements arranged with their centers aligned along a plurality of adjacent straight lines to form a corresponding plurality of columns, and with the detector elements in alternate columns being positioned such that their centers are staggered midway between the centers of detector elements in adjacent columns;
- in which the detector elements are parallelogram-shaped and the centers of detector elements in alternate columns are staggered by skewing the detector elements.
Dependencies are inferred from the claim text.