Back to results
US 5,515,409 AGranted
Helical interpolative algorithm for image reconstruction in a CT system
AssigneeGeneral Electric Company
InventorJiang Hsieh
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeGeneral Electric Company
InventorJiang Hsieh
Estimating the term…
The present invention, in one form, is an apparatus for performing image reconstruction using data obtained by a helical scan. In reconstructing an image in accordance with the present invention, projection data arrays corresponding to data planes associated with the slice to be imaged are generated. Weighting factors are then applied to the data arrays to assign a weight to each particular data element thereby creating a weighted projection data array. The weighted projection data array is then filtered and back projected to create an image data array from which an image slice is generated. In accordance with the present invention, the weighting function used in creating the weighted projection data array is based upon a plane of reconstruction which is not necessarily perpendicular to the z-axis.
A method of producing a tomographic image of an image object from data acquired in a helical scan, the data collected in a series of fan beam projections at a plurality of gantry angles about a z axis and within an image plane, the fan beam projections including a plurality of data at fan beam angles, said method comprising the steps of:
A method of producing a tomographic image of an image object from data acquired in a helical scan, the data collected in a series of fan beam projections at a plurality of gantry angles about a z axis and within an image plane, the fan beam projections including a plurality of data at fan beam angles, comprising the steps of:
A system for of producing a tomographic image of an object, said system comprising means for performing a helical scan of the object and for collecting beam projection data during the helical scan from a series of fan beam projections at a plurality of gantry angles about an axis and within an image plane, said tomographic image system further comprising a data acquisition system configured to:
Dependencies are inferred from the claim text.