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In the reconstruction, the misaligned geometry will cause streak artifacts which influence image quality. Here we propose a method to calibrate all the parameters simultaneously with the matrix form. In some cases, the relative position between the X-ray source and the detector is known and invariant, and then we can build a Cartesian coordinate system for the source and the detector. At the same...
Dual-energy Computed Tomography (DECT) is a useful tool that has been used widely in the security field and clinical diagnosis, because of its outstanding capability of material identification. One of the widely used pre-reconstruction methods for DECT is dual effect decomposition method. But the method only takes the compton scattering and photoelectric effect into consideration and ignores other...
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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