Backprojection for x-ray CT system

Details Backprojection for x-ray CT system Backprojection for x-ray CT system

1994-06-24

1995-12-05

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378901, A61B 603, G01N 23083

Patent

active

054736544

ABSTRACT:
An x-ray CT system acquires a series of views during a scan and reconstructs a slice image by backprojecting the filtered projection data from each acquired view. Backprojection is facilitated by employing a Cordic processor that produces the angle (.gamma.) and distance (L) of each pixel location from the x-ray source. The angle (.gamma.) selects the proper value from the filtered projection data, and this value is divided by the square of the distance (L) to arrive at a value used to update the slice image pixel value.

REFERENCES:
patent: 4365339 (1982-12-01), Parkovich et al.
patent: 4896287 (1990-01-01), O'Donnell et al.
patent: 5241576 (1993-08-01), Lonn
patent: 5359638 (1994-10-01), Hsieh et al.

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