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Metal streak artifacts in X-ray computed tomography: a simulation study

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5 Author(s)
B. De Man ; Med. Image Comput., Katholieke Univ., Leuven, Belgium ; J. Nuyts ; P. Dupont ; G. Marchal
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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

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IEEE Transactions on Nuclear Science  (Volume:46 ,  Issue: 3 )