Title :
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
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;
Conference_Titel :
Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5696-9
DOI :
10.1109/NSSMIC.1999.845798
