Title :
Metal streak artifacts in X-ray computed tomography: a simulation study
Author :
De Man, B. ; Nuyts, J. ; Dupont, P. ; Marchal, G. ; Suetens, Paul
Author_Institution :
Med. Image Comput., Katholieke Univ., Leuven, Belgium
fDate :
6/1/1999 12:00:00 AM
Abstract :
Metal streak artifacts are an important problem in X-ray computed tomography. A high-resolution 2D fan-beam computed tomography simulator is presented. Several potential causes of metal streak artifacts are studied using phantom measurements and simulations. Beam hardening, scatter, noise and exponential edge-gradient effects are identified as important causes of metal streak artifacts. Furthermore, aliasing effects and object motion can be also responsible for certain metal streak artifacts
Keywords :
computerised tomography; digital simulation; metals; virtual instrumentation; X-ray computed tomography; aliasing effects; beam hardening; beam scatter; exponential edge-gradient effects; high-resolution 2D fan-beam CT simulator; metal streak artifacts; noise; object motion; phantom measurements; simulation; Brain modeling; Computational modeling; Computed tomography; Filling; Image reconstruction; Imaging phantoms; Iron; Medical simulation; X-ray imaging; X-ray scattering;
Journal_Title :
Nuclear Science, IEEE Transactions on
