Title :
Metal streak artifacts in X-ray computed tomography: a simulation study
Author :
De Man, B. ; Nuyts, J. ; Dupont, P. ; Marchal, G. ; Suetens, P.
Author_Institution :
Med. Image Comput., Katholieke Univ., Leuven, Belgium
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 effect are identified as important causes of metal streak artifacts. Furthermore, also aliasing effects and object motion can be responsible for certain metal streak artifacts
Keywords :
computerised tomography; diagnostic radiography; image motion analysis; image reconstruction; medical image processing; X-ray computed tomography; aliasing effects; beam hardening; dental fillings; exponential edge-gradient effect; filtered backprojection; high-resolution 2D fan-beam CT simulator; metal streak artifacts; noise; object motion; parallel beam reconstruction; phantom measurements; scatter; Brain modeling; Computational modeling; Computed tomography; Detectors; Image reconstruction; Medical simulation; Sampling methods; Solid modeling; X-ray imaging; X-ray scattering;
Conference_Titel :
Nuclear Science Symposium, 1998. Conference Record. 1998 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-5021-9
DOI :
10.1109/NSSMIC.1998.773898
