Helical interpolative algorithm for image reconstruction in a CT

Details Helical interpolative algorithm for image reconstruction in a CT Helical interpolative algorithm for image reconstruction in a CT

1994-12-22

1996-05-07

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

36441316, A61B 603

Patent

active

055154093

ABSTRACT:
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.

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C. R. Crawford, K. F. King, Computed Temography Scanning with Simultaneous Patient Translation, Med. Phy. 17(6) Nov./Dec. 1990.

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