Reduction of metal streak artifacts in X-ray computed tomography using a transmission maximum a posteriori algorithm

Author

De Man, B. ; Nuyts, J. ; Dupont, P. ; Marchal, G. ; Suetens, P.

Author_Institution

Med. Image Comput., Katholieke Univ., Leuven, Belgium

Volume

2

fYear

1999

fDate

1999

Firstpage

850

Abstract

A maximum a posteriori algorithm for reduction of metal streak artifacts in X-ray computed tomography is presented. The algorithm uses a Markov random field smoothness prior and applies increased sampling in the reconstructed image. Good results are obtained for simulations and phantom measurements: streak artifacts are reduced while small, line-shaped details are preserved

Keywords

Markov processes; Poisson distribution; computerised tomography; diagnostic radiography; gradient methods; image restoration; medical image processing; smoothing methods; Markov random field smoothness prior; Poisson distribution; X-ray computed tomography; gradient algorithm; image reconstruction; increased sampling; iterative method; metal streak artifacts reduction; phantom measurements; preserved line-shaped details; transmission maximum a posteriori algorithm; Computed tomography; Dentistry; Filling; Image reconstruction; Image resolution; Imaging phantoms; Iterative algorithms; Iterative methods; Markov random fields; X-ray imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE

Conference_Location

Seattle, WA

ISSN

1082-3654

Print_ISBN

0-7803-5696-9

Type

conf

DOI

10.1109/NSSMIC.1999.845798

Filename

845798