22 March 2010 Energy-discrimination x-ray computed tomography system utilizing a scanning cadmium-telluride detector
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Abstract
An energy-discrimination K-edge x-ray computed tomography (CT) system is useful for controlling the image contrast of a target region by selecting both the photon energy and the energy width. The CT system has an oscillation-type linear cadmium telluride (CdTe) detectror. CT is performed by repeated linear scans and rotations of an object. Penetrating x-ray photons from the object are detected by a CdTe detector, and event signals of x-ray photons are produced using charge-sensitive and shaping amplifiers. Both photon energy and energy width are selected out using a multichannel analyzer, and the number of photons is counted by a counter card. In energy-discrimination CT, the tube voltage and tube current were 80 kV and 20 μA, respectively, and the x-ray intensity was 1.92 μGy/s at a distance of 1.0 m from the source and a tube voltage of 80 kV. The energy-discrimination CT was carried out by selecting x-ray photon energies.
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Eiichi Sato, Ablajan Abduraxit, Toshiyuki Enomoto, Manabu Watanabe, Keitaro Hitomi, Kiyomi Takahashi, Shigehiro Sato, Akira Ogawa, Jun Onagawa, "Energy-discrimination x-ray computed tomography system utilizing a scanning cadmium-telluride detector", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76222Z (22 March 2010); doi: 10.1117/12.843993; https://doi.org/10.1117/12.843993
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