Artifact reduction by z-dependent filtration of three-dimensiona

Details Artifact reduction by z-dependent filtration of three-dimensiona Artifact reduction by z-dependent filtration of three-dimensiona

1994-07-21

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

054736552

ABSTRACT:
A cone beam scanning apparatus reduces image artifacts incident to cone beam geometry by decomposing an acquired image into soft tissue and bone and air images based on the density of the pixels in that image The soft tissue image is filtered to remove image artifacts caused by zones of incomplete frequency space data in the original projection image and is recombined with the bone and air image. The filtering applied is dependent on the location of the reconstructed image along the z-axis.

REFERENCES:
patent: 5396528 (1995-03-01), Hu et al.
patent: 5400255 (1995-03-01), Hu
patent: 5400377 (1995-03-01), Hu et al.
patent: 5416815 (1995-05-01), Hsieh
Practical cone-Beam Algorithm, J. Opt. Soc. Am. A/vol. 1, No. 6/Jun. 1984, pp. 612-619, Feldkamp, et al.

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