Computed tomography system with translatable focal spot

Details Computed tomography system with translatable focal spot Computed tomography system with translatable focal spot

G - Physics

01

N

G01N 23/00 (2006.01) A61B 6/03 (2006.01)

Patent

CA 2042230

15CT03187 Abstract of the Disclosure A CT apparatus for reducing aliasing in reconstructed images uses an x-ray tube with a translatable focal spot to double the spatial sampling rate, over that achieved by a conventional CT machine, by acquiring a first and second projection corresponding to two different focal spot positions. The amount of gantry rotation and the translation distance of the focal spot are coordination so that the projections are interlaced and the resulting combined projection is geometrically indistinguishable from a conventional projection with twice the spatial sampling rate. The distance the focal spot is translated is further adjusted to eliminate redundant projections and provide adequate data acquisition time.

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