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The introduction of flat-panel detectors into the cone-beam computed tomography (CBCT) has a lot of benefits. Metallic implants have higher attenuation coefficient and it form shadows in the raw projection data. This shadow will cause streak artifacts which influence image quality and it is still a challenge to reduce the metal artifacts. There are many algorithms to reduce the metal artifacts and...
In dental Cone-Beam CT reconstruction images, the metallic implants will cause apparent streak artifacts, which may seriously increase the difficulty of diagnosis. Here we present a new metal artifacts reducing method designed for our dental CBCT with a half-size detector. In our method, we first locate the positions of all the metallic implants in the three-dimensional space, and then the projection...
In dual energy computerized tomography (DECT) which is widely used in industrial areas and security inspection, metal artifact reduction (MAR) is a troublesome problem. Pronounced streaks appear in the atomic number reconstruction and the value appears to be highly inaccurate when metal objects are present. In this article, a practical MAR method for DECT is proposed. Firstly, sinogram segmentation...
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